[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // neutron_hp -- source file |
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| 27 | // J.P. Wellisch, Nov-1996 |
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| 28 | // A prototype of the low energy neutron transport model. |
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| 29 | // |
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| 30 | // 070523 bug fix for G4FPE_DEBUG on by A. Howard ( and T. Koi) |
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| 31 | // 070606 bug fix and migrate to enable to Partial cases by T. Koi |
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[962] | 32 | // 080603 bug fix for Hadron Hyper News #932 by T. Koi |
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| 33 | // 080612 bug fix contribution from Benoit Pirard and Laurent Desorgher (Univ. Bern) #4,6 |
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| 34 | // 080717 bug fix of calculation of residual momentum by T. Koi |
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| 35 | // 080801 protect negative avalable energy by T. Koi |
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| 36 | // introduce theNDLDataA,Z which has A and Z of NDL data by T. Koi |
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| 37 | // 081024 G4NucleiPropertiesTable:: to G4NucleiProperties:: |
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[1055] | 38 | // 090514 Fix bug in IC electron emission case |
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| 39 | // Contribution from Chao Zhang (Chao.Zhang@usd.edu) and Dongming Mei(Dongming.Mei@usd.edu) |
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[1315] | 40 | // 100406 "nothingWasKnownOnHadron=1" then sample mu isotropic in CM |
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| 41 | // add two_body_reaction |
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[819] | 42 | // |
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| 43 | #include "G4NeutronHPInelasticCompFS.hh" |
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| 44 | #include "G4Nucleus.hh" |
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[962] | 45 | #include "G4NucleiProperties.hh" |
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[819] | 46 | #include "G4He3.hh" |
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| 47 | #include "G4Alpha.hh" |
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| 48 | #include "G4Electron.hh" |
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| 49 | #include "G4NeutronHPDataUsed.hh" |
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| 50 | #include "G4ParticleTable.hh" |
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| 51 | |
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| 52 | void G4NeutronHPInelasticCompFS::InitGammas(G4double AR, G4double ZR) |
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| 53 | { |
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| 54 | // char the[100] = {""}; |
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| 55 | // std::ostrstream ost(the, 100, std::ios::out); |
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| 56 | // ost <<gammaPath<<"z"<<ZR<<".a"<<AR; |
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| 57 | // G4String * aName = new G4String(the); |
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| 58 | // std::ifstream from(*aName, std::ios::in); |
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| 59 | |
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| 60 | std::ostringstream ost; |
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| 61 | ost <<gammaPath<<"z"<<ZR<<".a"<<AR; |
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| 62 | G4String aName = ost.str(); |
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| 63 | std::ifstream from(aName, std::ios::in); |
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| 64 | |
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| 65 | if(!from) return; // no data found for this isotope |
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| 66 | // std::ifstream theGammaData(*aName, std::ios::in); |
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| 67 | std::ifstream theGammaData(aName, std::ios::in); |
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| 68 | |
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| 69 | theGammas.Init(theGammaData); |
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| 70 | // delete aName; |
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| 71 | } |
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| 72 | |
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| 73 | void G4NeutronHPInelasticCompFS::Init (G4double A, G4double Z, G4String & dirName, G4String & aFSType) |
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| 74 | { |
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[1055] | 75 | |
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[819] | 76 | gammaPath = "/Inelastic/Gammas/"; |
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| 77 | if(!getenv("G4NEUTRONHPDATA")) |
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| 78 | throw G4HadronicException(__FILE__, __LINE__, "Please setenv G4NEUTRONHPDATA to point to the neutron cross-section files."); |
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| 79 | G4String tBase = getenv("G4NEUTRONHPDATA"); |
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| 80 | gammaPath = tBase+gammaPath; |
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| 81 | G4String tString = dirName; |
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| 82 | G4bool dbool; |
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| 83 | G4NeutronHPDataUsed aFile = theNames.GetName(static_cast<G4int>(A), static_cast<G4int>(Z), tString, aFSType, dbool); |
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| 84 | G4String filename = aFile.GetName(); |
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| 85 | theBaseA = aFile.GetA(); |
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| 86 | theBaseZ = aFile.GetZ(); |
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[962] | 87 | theNDLDataA = (int)aFile.GetA(); |
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| 88 | theNDLDataZ = aFile.GetZ(); |
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[819] | 89 | if(!dbool || ( Z<2.5 && ( std::abs(theBaseZ - Z)>0.0001 || std::abs(theBaseA - A)>0.0001))) |
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| 90 | { |
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| 91 | if(getenv("NeutronHPNamesLogging")) G4cout << "Skipped = "<< filename <<" "<<A<<" "<<Z<<G4endl; |
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| 92 | hasAnyData = false; |
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| 93 | hasFSData = false; |
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| 94 | hasXsec = false; |
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| 95 | return; |
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| 96 | } |
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| 97 | theBaseA = A; |
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| 98 | theBaseZ = G4int(Z+.5); |
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| 99 | std::ifstream theData(filename, std::ios::in); |
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| 100 | if(!theData) |
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| 101 | { |
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| 102 | hasAnyData = false; |
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| 103 | hasFSData = false; |
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| 104 | hasXsec = false; |
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| 105 | theData.close(); |
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| 106 | return; |
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| 107 | } |
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| 108 | // here we go |
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| 109 | G4int infoType, dataType, dummy; |
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| 110 | G4int sfType, it; |
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| 111 | hasFSData = false; |
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| 112 | while (theData >> infoType) |
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| 113 | { |
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| 114 | hasFSData = true; |
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| 115 | theData >> dataType; |
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| 116 | theData >> sfType >> dummy; |
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| 117 | it = 50; |
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| 118 | if(sfType>=600||(sfType<100&&sfType>=50)) it = sfType%50; |
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| 119 | if(dataType==3) |
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| 120 | { |
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| 121 | theData >> dummy >> dummy; |
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| 122 | theXsection[it] = new G4NeutronHPVector; |
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| 123 | G4int total; |
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| 124 | theData >> total; |
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| 125 | theXsection[it]->Init(theData, total, eV); |
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| 126 | //std::cout << theXsection[it]->GetXsec(1*MeV) << std::endl; |
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| 127 | } |
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| 128 | else if(dataType==4) |
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| 129 | { |
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| 130 | theAngularDistribution[it] = new G4NeutronHPAngular; |
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| 131 | theAngularDistribution[it]->Init(theData); |
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| 132 | } |
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| 133 | else if(dataType==5) |
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| 134 | { |
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| 135 | theEnergyDistribution[it] = new G4NeutronHPEnergyDistribution; |
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| 136 | theEnergyDistribution[it]->Init(theData); |
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| 137 | } |
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| 138 | else if(dataType==6) |
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| 139 | { |
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| 140 | theEnergyAngData[it] = new G4NeutronHPEnAngCorrelation; |
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| 141 | theEnergyAngData[it]->Init(theData); |
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| 142 | } |
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| 143 | else if(dataType==12) |
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| 144 | { |
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| 145 | theFinalStatePhotons[it] = new G4NeutronHPPhotonDist; |
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| 146 | theFinalStatePhotons[it]->InitMean(theData); |
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| 147 | } |
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| 148 | else if(dataType==13) |
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| 149 | { |
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| 150 | theFinalStatePhotons[it] = new G4NeutronHPPhotonDist; |
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| 151 | theFinalStatePhotons[it]->InitPartials(theData); |
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| 152 | } |
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| 153 | else if(dataType==14) |
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| 154 | { |
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| 155 | theFinalStatePhotons[it]->InitAngular(theData); |
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| 156 | } |
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| 157 | else if(dataType==15) |
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| 158 | { |
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| 159 | theFinalStatePhotons[it]->InitEnergies(theData); |
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| 160 | } |
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| 161 | else |
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| 162 | { |
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| 163 | throw G4HadronicException(__FILE__, __LINE__, "Data-type unknown to G4NeutronHPInelasticCompFS"); |
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| 164 | } |
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| 165 | } |
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| 166 | theData.close(); |
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| 167 | } |
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| 168 | |
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| 169 | G4int G4NeutronHPInelasticCompFS::SelectExitChannel(G4double eKinetic) |
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| 170 | { |
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| 171 | |
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| 172 | // it = 0 has without Photon |
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| 173 | G4double running[50]; |
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| 174 | running[0] = 0; |
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| 175 | unsigned int i; |
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| 176 | for(i=0; i<50; i++) |
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| 177 | { |
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| 178 | if(i!=0) running[i]=running[i-1]; |
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| 179 | if(theXsection[i] != 0) |
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| 180 | { |
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| 181 | running[i] += std::max(0., theXsection[i]->GetXsec(eKinetic)); |
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| 182 | } |
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| 183 | } |
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| 184 | G4double random = G4UniformRand(); |
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| 185 | G4double sum = running[49]; |
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| 186 | G4int it = 50; |
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| 187 | if(0!=sum) |
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| 188 | { |
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| 189 | G4int i0; |
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| 190 | for(i0=0; i0<50; i0++) |
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| 191 | { |
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| 192 | it = i0; |
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| 193 | if(random < running[i0]/sum) break; |
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| 194 | } |
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| 195 | } |
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| 196 | //debug: it = 1; |
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| 197 | return it; |
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| 198 | } |
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| 199 | |
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[962] | 200 | |
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| 201 | //n,p,d,t,he3,a |
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[819] | 202 | void G4NeutronHPInelasticCompFS::CompositeApply(const G4HadProjectile & theTrack, G4ParticleDefinition * aDefinition) |
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| 203 | { |
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| 204 | |
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| 205 | // prepare neutron |
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| 206 | theResult.Clear(); |
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| 207 | G4double eKinetic = theTrack.GetKineticEnergy(); |
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| 208 | const G4HadProjectile *incidentParticle = &theTrack; |
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| 209 | G4ReactionProduct theNeutron( const_cast<G4ParticleDefinition *>(incidentParticle->GetDefinition()) ); |
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| 210 | theNeutron.SetMomentum( incidentParticle->Get4Momentum().vect() ); |
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| 211 | theNeutron.SetKineticEnergy( eKinetic ); |
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| 212 | |
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| 213 | // prepare target |
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| 214 | G4int i; |
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| 215 | for(i=0; i<50; i++) |
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| 216 | { if(theXsection[i] != 0) { break; } } |
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[962] | 217 | |
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[819] | 218 | G4double targetMass=0; |
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| 219 | G4double eps = 0.0001; |
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[962] | 220 | targetMass = ( G4NucleiProperties::GetNuclearMass(static_cast<G4int>(theBaseA+eps), static_cast<G4int>(theBaseZ+eps))) / |
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[819] | 221 | G4Neutron::Neutron()->GetPDGMass(); |
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| 222 | // if(theEnergyAngData[i]!=0) |
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| 223 | // targetMass = theEnergyAngData[i]->GetTargetMass(); |
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| 224 | // else if(theAngularDistribution[i]!=0) |
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| 225 | // targetMass = theAngularDistribution[i]->GetTargetMass(); |
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| 226 | // else if(theFinalStatePhotons[50]!=0) |
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| 227 | // targetMass = theFinalStatePhotons[50]->GetTargetMass(); |
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| 228 | G4Nucleus aNucleus; |
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| 229 | G4ReactionProduct theTarget; |
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| 230 | G4ThreeVector neuVelo = (1./incidentParticle->GetDefinition()->GetPDGMass())*theNeutron.GetMomentum(); |
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| 231 | theTarget = aNucleus.GetBiasedThermalNucleus( targetMass, neuVelo, theTrack.GetMaterial()->GetTemperature()); |
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| 232 | |
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| 233 | // prepare the residual mass |
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| 234 | G4double residualMass=0; |
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| 235 | G4double residualZ = theBaseZ - aDefinition->GetPDGCharge(); |
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| 236 | G4double residualA = theBaseA - aDefinition->GetBaryonNumber()+1; |
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[962] | 237 | residualMass = ( G4NucleiProperties::GetNuclearMass(static_cast<G4int>(residualA+eps), static_cast<G4int>(residualZ+eps)) ) / |
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[819] | 238 | G4Neutron::Neutron()->GetPDGMass(); |
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| 239 | |
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| 240 | // prepare energy in target rest frame |
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| 241 | G4ReactionProduct boosted; |
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| 242 | boosted.Lorentz(theNeutron, theTarget); |
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| 243 | eKinetic = boosted.GetKineticEnergy(); |
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| 244 | // G4double momentumInCMS = boosted.GetTotalMomentum(); |
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| 245 | |
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| 246 | // select exit channel for composite FS class. |
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[962] | 247 | G4int it = SelectExitChannel( eKinetic ); |
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[819] | 248 | |
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| 249 | // set target and neutron in the relevant exit channel |
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| 250 | InitDistributionInitialState(theNeutron, theTarget, it); |
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| 251 | |
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| 252 | G4ReactionProductVector * thePhotons = 0; |
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| 253 | G4ReactionProductVector * theParticles = 0; |
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| 254 | G4ReactionProduct aHadron; |
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| 255 | aHadron.SetDefinition(aDefinition); // what if only cross-sections exist ==> Na 23 11 @@@@ |
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| 256 | G4double availableEnergy = theNeutron.GetKineticEnergy() + theNeutron.GetMass() - aHadron.GetMass() + |
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| 257 | (targetMass - residualMass)*G4Neutron::Neutron()->GetPDGMass(); |
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[962] | 258 | //080730c |
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| 259 | if ( availableEnergy < 0 ) |
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| 260 | { |
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| 261 | //G4cout << "080730c Adjust availavleEnergy " << G4endl; |
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| 262 | availableEnergy = 0; |
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| 263 | } |
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[819] | 264 | G4int nothingWasKnownOnHadron = 0; |
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| 265 | G4int dummy; |
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| 266 | G4double eGamm = 0; |
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| 267 | G4int iLevel=it-1; |
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[962] | 268 | |
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| 269 | // TK without photon has it = 0 |
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| 270 | if( 50 == it ) |
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[819] | 271 | { |
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[962] | 272 | |
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| 273 | // TK Excitation level is not determined |
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[819] | 274 | iLevel=-1; |
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| 275 | aHadron.SetKineticEnergy(availableEnergy*residualMass*G4Neutron::Neutron()->GetPDGMass()/ |
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| 276 | (aHadron.GetMass()+residualMass*G4Neutron::Neutron()->GetPDGMass())); |
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| 277 | |
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[962] | 278 | aHadron.SetMomentum(theNeutron.GetMomentum()*(1./theNeutron.GetTotalMomentum())* |
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| 279 | std::sqrt(aHadron.GetTotalEnergy()*aHadron.GetTotalEnergy()- |
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| 280 | aHadron.GetMass()*aHadron.GetMass())); |
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[819] | 281 | |
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[962] | 282 | /* |
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[819] | 283 | G4double p2 = ( aHadron.GetTotalEnergy()*aHadron.GetTotalEnergy()-aHadron.GetMass()*aHadron.GetMass() ); |
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| 284 | G4double p = 0.0; |
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| 285 | if ( p2 > 0.0 ) |
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| 286 | { |
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| 287 | p = std::sqrt( p ); |
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| 288 | } |
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| 289 | aHadron.SetMomentum(theNeutron.GetMomentum()*(1./theNeutron.GetTotalMomentum())*p ); |
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[962] | 290 | */ |
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[819] | 291 | |
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| 292 | } |
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| 293 | else |
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| 294 | { |
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| 295 | while( iLevel!=-1 && theGammas.GetLevel(iLevel)==0 ) { iLevel--; } |
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| 296 | } |
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[962] | 297 | |
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| 298 | |
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| 299 | if ( theAngularDistribution[it] != 0 ) // MF4 |
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[819] | 300 | { |
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[962] | 301 | if(theEnergyDistribution[it]!=0) // MF5 |
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[819] | 302 | { |
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| 303 | aHadron.SetKineticEnergy(theEnergyDistribution[it]->Sample(eKinetic, dummy)); |
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| 304 | G4double eSecN = aHadron.GetKineticEnergy(); |
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| 305 | eGamm = eKinetic-eSecN; |
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| 306 | for(iLevel=theGammas.GetNumberOfLevels()-1; iLevel>=0; iLevel--) |
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| 307 | { |
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| 308 | if(theGammas.GetLevelEnergy(iLevel)<eGamm) break; |
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| 309 | } |
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| 310 | G4double random = 2*G4UniformRand(); |
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| 311 | iLevel+=G4int(random); |
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| 312 | if(iLevel>theGammas.GetNumberOfLevels()-1)iLevel = theGammas.GetNumberOfLevels()-1; |
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| 313 | } |
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| 314 | else |
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| 315 | { |
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| 316 | G4double eExcitation = 0; |
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| 317 | if(iLevel>=0) eExcitation = theGammas.GetLevel(iLevel)->GetLevelEnergy(); |
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| 318 | while (eKinetic-eExcitation < 0 && iLevel>0) |
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| 319 | { |
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| 320 | iLevel--; |
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| 321 | eExcitation = theGammas.GetLevel(iLevel)->GetLevelEnergy(); |
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| 322 | } |
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| 323 | |
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| 324 | if(getenv("InelasticCompFSLogging") && eKinetic-eExcitation < 0) |
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| 325 | { |
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| 326 | throw G4HadronicException(__FILE__, __LINE__, "SEVERE: InelasticCompFS: Consistency of data not good enough, please file report"); |
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| 327 | } |
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| 328 | if(eKinetic-eExcitation < 0) eExcitation = 0; |
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| 329 | if(iLevel!= -1) aHadron.SetKineticEnergy(eKinetic - eExcitation); |
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| 330 | |
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| 331 | } |
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| 332 | theAngularDistribution[it]->SampleAndUpdate(aHadron); |
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[962] | 333 | |
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| 334 | if( theFinalStatePhotons[it] == 0 ) |
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[819] | 335 | { |
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| 336 | // TK comment Most n,n* eneter to this |
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| 337 | thePhotons = theGammas.GetDecayGammas(iLevel); |
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| 338 | eGamm -= theGammas.GetLevelEnergy(iLevel); |
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| 339 | if(eGamm>0) // @ ok for now, but really needs an efficient way of correllated sampling @ |
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| 340 | { |
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| 341 | G4ReactionProduct * theRestEnergy = new G4ReactionProduct; |
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| 342 | theRestEnergy->SetDefinition(G4Gamma::Gamma()); |
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| 343 | theRestEnergy->SetKineticEnergy(eGamm); |
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| 344 | G4double costh = 2.*G4UniformRand()-1.; |
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| 345 | G4double phi = twopi*G4UniformRand(); |
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| 346 | theRestEnergy->SetMomentum(eGamm*std::sin(std::acos(costh))*std::cos(phi), |
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| 347 | eGamm*std::sin(std::acos(costh))*std::sin(phi), |
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| 348 | eGamm*costh); |
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| 349 | if(thePhotons == 0) { thePhotons = new G4ReactionProductVector; } |
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| 350 | thePhotons->push_back(theRestEnergy); |
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| 351 | } |
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| 352 | } |
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| 353 | } |
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[962] | 354 | else if(theEnergyAngData[it] != 0) // MF6 |
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[819] | 355 | { |
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| 356 | theParticles = theEnergyAngData[it]->Sample(eKinetic); |
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| 357 | } |
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| 358 | else |
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| 359 | { |
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| 360 | // @@@ what to do, if we have photon data, but no info on the hadron itself |
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| 361 | nothingWasKnownOnHadron = 1; |
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| 362 | } |
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[962] | 363 | |
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[819] | 364 | //G4cout << "theFinalStatePhotons it " << it << G4endl; |
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| 365 | //G4cout << "theFinalStatePhotons[it] " << theFinalStatePhotons[it] << G4endl; |
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| 366 | //G4cout << "theFinalStatePhotons it " << it << G4endl; |
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| 367 | //G4cout << "theFinalStatePhotons[it] " << theFinalStatePhotons[it] << G4endl; |
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| 368 | //G4cout << "thePhotons " << thePhotons << G4endl; |
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[962] | 369 | |
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| 370 | if ( theFinalStatePhotons[it] != 0 ) |
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[819] | 371 | { |
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[962] | 372 | // the photon distributions are in the Nucleus rest frame. |
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| 373 | // TK residual rest frame |
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[819] | 374 | G4ReactionProduct boosted; |
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| 375 | boosted.Lorentz(theNeutron, theTarget); |
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| 376 | G4double anEnergy = boosted.GetKineticEnergy(); |
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| 377 | thePhotons = theFinalStatePhotons[it]->GetPhotons(anEnergy); |
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| 378 | G4double aBaseEnergy = theFinalStatePhotons[it]->GetLevelEnergy(); |
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| 379 | G4double testEnergy = 0; |
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| 380 | if(thePhotons!=0 && thePhotons->size()!=0) |
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| 381 | { aBaseEnergy-=thePhotons->operator[](0)->GetTotalEnergy(); } |
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| 382 | if(theFinalStatePhotons[it]->NeedsCascade()) |
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| 383 | { |
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| 384 | while(aBaseEnergy>0.01*keV) |
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| 385 | { |
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| 386 | // cascade down the levels |
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| 387 | G4bool foundMatchingLevel = false; |
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| 388 | G4int closest = 2; |
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| 389 | G4double deltaEold = -1; |
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| 390 | for(G4int i=1; i<it; i++) |
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| 391 | { |
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| 392 | if(theFinalStatePhotons[i]!=0) |
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| 393 | { |
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| 394 | testEnergy = theFinalStatePhotons[i]->GetLevelEnergy(); |
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| 395 | } |
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| 396 | else |
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| 397 | { |
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| 398 | testEnergy = 0; |
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| 399 | } |
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| 400 | G4double deltaE = std::abs(testEnergy-aBaseEnergy); |
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| 401 | if(deltaE<0.1*keV) |
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| 402 | { |
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| 403 | G4ReactionProductVector * theNext = |
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| 404 | theFinalStatePhotons[i]->GetPhotons(anEnergy); |
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| 405 | thePhotons->push_back(theNext->operator[](0)); |
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| 406 | aBaseEnergy = testEnergy-theNext->operator[](0)->GetTotalEnergy(); |
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| 407 | delete theNext; |
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| 408 | foundMatchingLevel = true; |
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| 409 | break; // ===> |
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| 410 | } |
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| 411 | if(theFinalStatePhotons[i]!=0 && ( deltaE<deltaEold||deltaEold<0.) ) |
---|
| 412 | { |
---|
| 413 | closest = i; |
---|
| 414 | deltaEold = deltaE; |
---|
| 415 | } |
---|
| 416 | } // <=== the break goes here. |
---|
| 417 | if(!foundMatchingLevel) |
---|
| 418 | { |
---|
| 419 | G4ReactionProductVector * theNext = |
---|
| 420 | theFinalStatePhotons[closest]->GetPhotons(anEnergy); |
---|
| 421 | thePhotons->push_back(theNext->operator[](0)); |
---|
| 422 | aBaseEnergy = aBaseEnergy-theNext->operator[](0)->GetTotalEnergy(); |
---|
| 423 | delete theNext; |
---|
| 424 | } |
---|
| 425 | } |
---|
| 426 | } |
---|
| 427 | } |
---|
| 428 | unsigned int i0; |
---|
| 429 | if(thePhotons!=0) |
---|
| 430 | { |
---|
| 431 | for(i0=0; i0<thePhotons->size(); i0++) |
---|
| 432 | { |
---|
| 433 | // back to lab |
---|
| 434 | thePhotons->operator[](i0)->Lorentz(*(thePhotons->operator[](i0)), -1.*theTarget); |
---|
| 435 | } |
---|
| 436 | } |
---|
| 437 | //G4cout << "nothingWasKnownOnHadron " << nothingWasKnownOnHadron << G4endl; |
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| 438 | if(nothingWasKnownOnHadron) |
---|
| 439 | { |
---|
[1315] | 440 | // TKDB 100405 |
---|
| 441 | // In this case, hadron should be isotropic in CM |
---|
| 442 | // mu and p should be correlated |
---|
| 443 | // |
---|
| 444 | G4double totalPhotonEnergy = 0.0; |
---|
| 445 | if ( thePhotons != 0 ) |
---|
| 446 | { |
---|
| 447 | unsigned int nPhotons = thePhotons->size(); |
---|
| 448 | unsigned int i0; |
---|
| 449 | for ( i0=0; i0<nPhotons; i0++) |
---|
| 450 | { |
---|
| 451 | //thePhotons has energies at LAB system |
---|
| 452 | totalPhotonEnergy += thePhotons->operator[](i0)->GetTotalEnergy(); |
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| 453 | } |
---|
| 454 | } |
---|
| 455 | |
---|
| 456 | //isotropic distribution in CM |
---|
| 457 | G4double mu = 1.0 - 2 * G4UniformRand(); |
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| 458 | |
---|
| 459 | // need momentums in target rest frame; |
---|
| 460 | G4LorentzVector target_in_LAB ( theTarget.GetMomentum() , theTarget.GetTotalEnergy() ); |
---|
| 461 | G4ThreeVector boostToTargetRest = -target_in_LAB.boostVector(); |
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| 462 | G4LorentzVector proj_in_LAB = incidentParticle->Get4Momentum(); |
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| 463 | |
---|
| 464 | G4DynamicParticle* proj = new G4DynamicParticle( G4Neutron::Neutron() , proj_in_LAB.boost( boostToTargetRest ) ); |
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| 465 | G4DynamicParticle* targ = new G4DynamicParticle( G4ParticleTable::GetParticleTable()->GetIon ( (G4int)theBaseZ , (G4int)theBaseA , totalPhotonEnergy ) , G4ThreeVector(0) ); |
---|
| 466 | G4DynamicParticle* hadron = new G4DynamicParticle( aHadron.GetDefinition() , G4ThreeVector(0) ); // will be fill momentum |
---|
| 467 | |
---|
| 468 | two_body_reaction ( proj , targ , hadron , mu ); |
---|
| 469 | |
---|
| 470 | G4LorentzVector hadron_in_trag_rest = hadron->Get4Momentum(); |
---|
| 471 | G4LorentzVector hadron_in_LAB = hadron_in_trag_rest.boost ( -boostToTargetRest ); |
---|
| 472 | aHadron.SetMomentum( hadron_in_LAB.v() ); |
---|
| 473 | aHadron.SetKineticEnergy ( hadron_in_LAB.e() - hadron_in_LAB.m() ); |
---|
| 474 | |
---|
| 475 | delete proj; |
---|
| 476 | delete targ; |
---|
| 477 | delete hadron; |
---|
| 478 | |
---|
| 479 | //TKDB 100405 |
---|
| 480 | /* |
---|
[819] | 481 | G4double totalPhotonEnergy = 0; |
---|
| 482 | if(thePhotons!=0) |
---|
| 483 | { |
---|
| 484 | unsigned int nPhotons = thePhotons->size(); |
---|
| 485 | unsigned int i0; |
---|
| 486 | for(i0=0; i0<nPhotons; i0++) |
---|
| 487 | { |
---|
| 488 | totalPhotonEnergy += thePhotons->operator[](i0)->GetTotalEnergy(); |
---|
| 489 | } |
---|
| 490 | } |
---|
| 491 | availableEnergy -= totalPhotonEnergy; |
---|
| 492 | residualMass += totalPhotonEnergy/G4Neutron::Neutron()->GetPDGMass(); |
---|
| 493 | aHadron.SetKineticEnergy(availableEnergy*residualMass*G4Neutron::Neutron()->GetPDGMass()/ |
---|
| 494 | (aHadron.GetMass()+residualMass*G4Neutron::Neutron()->GetPDGMass())); |
---|
| 495 | G4double CosTheta = 1.0 - 2.0*G4UniformRand(); |
---|
| 496 | G4double SinTheta = std::sqrt(1.0 - CosTheta*CosTheta); |
---|
| 497 | G4double Phi = twopi*G4UniformRand(); |
---|
| 498 | G4ThreeVector Vector(std::cos(Phi)*SinTheta, std::sin(Phi)*SinTheta, CosTheta); |
---|
| 499 | //aHadron.SetMomentum(Vector* std::sqrt(aHadron.GetTotalEnergy()*aHadron.GetTotalEnergy()- |
---|
| 500 | // aHadron.GetMass()*aHadron.GetMass())); |
---|
| 501 | G4double p2 = aHadron.GetTotalEnergy()*aHadron.GetTotalEnergy()- aHadron.GetMass()*aHadron.GetMass(); |
---|
| 502 | |
---|
| 503 | G4double p = 0.0; |
---|
| 504 | if ( p2 > 0.0 ) |
---|
| 505 | p = std::sqrt ( p2 ); |
---|
| 506 | |
---|
| 507 | aHadron.SetMomentum( Vector*p ); |
---|
[1315] | 508 | */ |
---|
[1055] | 509 | |
---|
[819] | 510 | } |
---|
| 511 | |
---|
| 512 | // fill the result |
---|
| 513 | // Beware - the recoil is not necessarily in the particles... |
---|
| 514 | // Can be calculated from momentum conservation? |
---|
| 515 | // The idea is that the particles ar emitted forst, and the gammas only once the |
---|
| 516 | // recoil is on the residual; assumption is that gammas do not contribute to |
---|
| 517 | // the recoil. |
---|
| 518 | // This needs more design @@@ |
---|
| 519 | |
---|
| 520 | G4int nSecondaries = 2; // the hadron and the recoil |
---|
| 521 | G4bool needsSeparateRecoil = false; |
---|
| 522 | G4int totalBaryonNumber = 0; |
---|
| 523 | G4int totalCharge = 0; |
---|
| 524 | G4ThreeVector totalMomentum(0); |
---|
| 525 | if(theParticles != 0) |
---|
| 526 | { |
---|
| 527 | nSecondaries = theParticles->size(); |
---|
| 528 | G4ParticleDefinition * aDef; |
---|
| 529 | unsigned int i0; |
---|
| 530 | for(i0=0; i0<theParticles->size(); i0++) |
---|
| 531 | { |
---|
| 532 | aDef = theParticles->operator[](i0)->GetDefinition(); |
---|
| 533 | totalBaryonNumber+=aDef->GetBaryonNumber(); |
---|
| 534 | totalCharge+=G4int(aDef->GetPDGCharge()+eps); |
---|
| 535 | totalMomentum += theParticles->operator[](i0)->GetMomentum(); |
---|
| 536 | } |
---|
| 537 | if(totalBaryonNumber!=G4int(theBaseA+eps+incidentParticle->GetDefinition()->GetBaryonNumber())) |
---|
| 538 | { |
---|
| 539 | needsSeparateRecoil = true; |
---|
| 540 | nSecondaries++; |
---|
| 541 | residualA = G4int(theBaseA+eps+incidentParticle->GetDefinition()->GetBaryonNumber() |
---|
| 542 | -totalBaryonNumber); |
---|
| 543 | residualZ = G4int(theBaseZ+eps+incidentParticle->GetDefinition()->GetPDGCharge() |
---|
| 544 | -totalCharge); |
---|
| 545 | } |
---|
| 546 | } |
---|
| 547 | |
---|
| 548 | G4int nPhotons = 0; |
---|
| 549 | if(thePhotons!=0) { nPhotons = thePhotons->size(); } |
---|
| 550 | nSecondaries += nPhotons; |
---|
| 551 | |
---|
| 552 | G4DynamicParticle * theSec; |
---|
| 553 | |
---|
| 554 | if( theParticles==0 ) |
---|
| 555 | { |
---|
| 556 | theSec = new G4DynamicParticle; |
---|
| 557 | theSec->SetDefinition(aHadron.GetDefinition()); |
---|
| 558 | theSec->SetMomentum(aHadron.GetMomentum()); |
---|
| 559 | theResult.AddSecondary(theSec); |
---|
| 560 | |
---|
| 561 | aHadron.Lorentz(aHadron, theTarget); |
---|
| 562 | G4ReactionProduct theResidual; |
---|
| 563 | theResidual.SetDefinition(G4ParticleTable::GetParticleTable() |
---|
| 564 | ->GetIon(static_cast<G4int>(residualZ), static_cast<G4int>(residualA), 0)); |
---|
| 565 | theResidual.SetKineticEnergy(aHadron.GetKineticEnergy()*aHadron.GetMass()/theResidual.GetMass()); |
---|
[962] | 566 | |
---|
| 567 | //080612TK contribution from Benoit Pirard and Laurent Desorgher (Univ. Bern) #6 |
---|
| 568 | //theResidual.SetMomentum(-1.*aHadron.GetMomentum()); |
---|
| 569 | G4ThreeVector incidentNeutronMomentum = theNeutron.GetMomentum(); |
---|
| 570 | theResidual.SetMomentum(incidentNeutronMomentum - aHadron.GetMomentum()); |
---|
| 571 | |
---|
[819] | 572 | theResidual.Lorentz(theResidual, -1.*theTarget); |
---|
| 573 | G4ThreeVector totalPhotonMomentum(0,0,0); |
---|
| 574 | if(thePhotons!=0) |
---|
| 575 | { |
---|
| 576 | for(i=0; i<nPhotons; i++) |
---|
| 577 | { |
---|
| 578 | totalPhotonMomentum += thePhotons->operator[](i)->GetMomentum(); |
---|
| 579 | } |
---|
| 580 | } |
---|
| 581 | theSec = new G4DynamicParticle; |
---|
| 582 | theSec->SetDefinition(theResidual.GetDefinition()); |
---|
| 583 | theSec->SetMomentum(theResidual.GetMomentum()-totalPhotonMomentum); |
---|
| 584 | theResult.AddSecondary(theSec); |
---|
| 585 | } |
---|
| 586 | else |
---|
| 587 | { |
---|
| 588 | for(i0=0; i0<theParticles->size(); i0++) |
---|
| 589 | { |
---|
| 590 | theSec = new G4DynamicParticle; |
---|
| 591 | theSec->SetDefinition(theParticles->operator[](i0)->GetDefinition()); |
---|
| 592 | theSec->SetMomentum(theParticles->operator[](i0)->GetMomentum()); |
---|
| 593 | theResult.AddSecondary(theSec); |
---|
| 594 | delete theParticles->operator[](i0); |
---|
| 595 | } |
---|
| 596 | delete theParticles; |
---|
| 597 | if(needsSeparateRecoil && residualZ!=0) |
---|
| 598 | { |
---|
| 599 | G4ReactionProduct theResidual; |
---|
| 600 | theResidual.SetDefinition(G4ParticleTable::GetParticleTable() |
---|
| 601 | ->GetIon(static_cast<G4int>(residualZ), static_cast<G4int>(residualA), 0)); |
---|
| 602 | G4double resiualKineticEnergy = theResidual.GetMass()*theResidual.GetMass(); |
---|
| 603 | resiualKineticEnergy += totalMomentum*totalMomentum; |
---|
| 604 | resiualKineticEnergy = std::sqrt(resiualKineticEnergy) - theResidual.GetMass(); |
---|
| 605 | // cout << "Kinetic energy of the residual = "<<resiualKineticEnergy<<endl; |
---|
| 606 | theResidual.SetKineticEnergy(resiualKineticEnergy); |
---|
[962] | 607 | |
---|
| 608 | //080612TK contribution from Benoit Pirard and Laurent Desorgher (Univ. Bern) #4 |
---|
| 609 | //theResidual.SetMomentum(-1.*totalMomentum); |
---|
| 610 | //G4ThreeVector incidentNeutronMomentum = theNeutron.GetMomentum(); |
---|
| 611 | //theResidual.SetMomentum(incidentNeutronMomentum - aHadron.GetMomentum()); |
---|
| 612 | //080717 TK Comment still do NOT include photon's mometum which produce by thePhotons |
---|
| 613 | theResidual.SetMomentum( theNeutron.GetMomentum() + theTarget.GetMomentum() - totalMomentum ); |
---|
| 614 | |
---|
[819] | 615 | theSec = new G4DynamicParticle; |
---|
| 616 | theSec->SetDefinition(theResidual.GetDefinition()); |
---|
| 617 | theSec->SetMomentum(theResidual.GetMomentum()); |
---|
| 618 | theResult.AddSecondary(theSec); |
---|
| 619 | } |
---|
| 620 | } |
---|
| 621 | if(thePhotons!=0) |
---|
| 622 | { |
---|
| 623 | for(i=0; i<nPhotons; i++) |
---|
| 624 | { |
---|
| 625 | theSec = new G4DynamicParticle; |
---|
[1055] | 626 | //Bug reported Chao Zhang (Chao.Zhang@usd.edu), Dongming Mei(Dongming.Mei@usd.edu) Feb. 25, 2009 |
---|
| 627 | //theSec->SetDefinition(G4Gamma::Gamma()); |
---|
| 628 | theSec->SetDefinition( thePhotons->operator[](i)->GetDefinition() ); |
---|
| 629 | //But never cause real effect at least with G4NDL3.13 TK |
---|
[819] | 630 | theSec->SetMomentum(thePhotons->operator[](i)->GetMomentum()); |
---|
| 631 | theResult.AddSecondary(theSec); |
---|
| 632 | delete thePhotons->operator[](i); |
---|
| 633 | } |
---|
| 634 | // some garbage collection |
---|
| 635 | delete thePhotons; |
---|
| 636 | } |
---|
[962] | 637 | |
---|
| 638 | //080721 |
---|
| 639 | G4ParticleDefinition* targ_pd = G4ParticleTable::GetParticleTable()->GetIon ( (G4int)theBaseZ , (G4int)theBaseA , 0.0 ); |
---|
| 640 | G4LorentzVector targ_4p_lab ( theTarget.GetMomentum() , std::sqrt( targ_pd->GetPDGMass()*targ_pd->GetPDGMass() + theTarget.GetMomentum().mag2() ) ); |
---|
| 641 | G4LorentzVector proj_4p_lab = theTrack.Get4Momentum(); |
---|
| 642 | G4LorentzVector init_4p_lab = proj_4p_lab + targ_4p_lab; |
---|
| 643 | adjust_final_state ( init_4p_lab ); |
---|
| 644 | |
---|
[819] | 645 | // clean up the primary neutron |
---|
| 646 | theResult.SetStatusChange(stopAndKill); |
---|
| 647 | } |
---|
[1315] | 648 | |
---|
| 649 | |
---|
| 650 | |
---|
| 651 | #include "G4RotationMatrix.hh" |
---|
| 652 | void G4NeutronHPInelasticCompFS::two_body_reaction ( G4DynamicParticle* proj, G4DynamicParticle* targ, G4DynamicParticle* hadron, G4double mu ) |
---|
| 653 | { |
---|
| 654 | |
---|
| 655 | // Target rest flame |
---|
| 656 | // 4vector in targ rest frame; |
---|
| 657 | // targ could have excitation energy (photon energy will be emiited) tricky but,,, |
---|
| 658 | |
---|
| 659 | G4LorentzVector before = proj->Get4Momentum() + targ->Get4Momentum(); |
---|
| 660 | |
---|
| 661 | G4ThreeVector p3_proj = proj->GetMomentum(); |
---|
| 662 | G4ThreeVector d = p3_proj.unit(); |
---|
| 663 | G4RotationMatrix rot; |
---|
| 664 | G4RotationMatrix rot1; |
---|
| 665 | rot1.setPhi( pi/2 + d.phi() ); |
---|
| 666 | G4RotationMatrix rot2; |
---|
| 667 | rot2.setTheta( d.theta() ); |
---|
| 668 | rot=rot2*rot1; |
---|
| 669 | proj->SetMomentum( rot*p3_proj ); |
---|
| 670 | |
---|
| 671 | // Now proj only has pz component; |
---|
| 672 | |
---|
| 673 | // mu in CM system |
---|
| 674 | |
---|
| 675 | //Valid only for neutron incidence |
---|
| 676 | G4DynamicParticle* residual = new G4DynamicParticle ( G4ParticleTable::GetParticleTable()->GetIon ( (G4int)( targ->GetDefinition()->GetPDGCharge() - hadron->GetDefinition()->GetPDGCharge() ) , (G4int)(targ->GetDefinition()->GetBaryonNumber() - hadron->GetDefinition()->GetBaryonNumber()+1) , 0 ) , G4ThreeVector(0) ); |
---|
| 677 | |
---|
| 678 | G4double Q = proj->GetDefinition()->GetPDGMass() + targ->GetDefinition()->GetPDGMass() |
---|
| 679 | - ( hadron->GetDefinition()->GetPDGMass() + residual->GetDefinition()->GetPDGMass() ); |
---|
| 680 | |
---|
| 681 | // Non Relativistic Case |
---|
| 682 | G4double A = targ->GetDefinition()->GetPDGMass() / proj->GetDefinition()->GetPDGMass(); |
---|
| 683 | G4double AA = hadron->GetDefinition()->GetPDGMass() / proj->GetDefinition()->GetPDGMass(); |
---|
| 684 | G4double E1 = proj->GetKineticEnergy(); |
---|
| 685 | G4double beta = std::sqrt ( A*(A+1-AA)/AA*(1+(1+A)/A*Q/E1) ); |
---|
| 686 | G4double gamma = AA/(A+1-AA)*beta; |
---|
| 687 | G4double E3 = AA/std::pow((1+A),2)*(beta*beta+1+2*beta*mu)*E1; |
---|
| 688 | G4double omega3 = (1+beta*mu)/std::sqrt(beta*beta+1+2*beta*mu); |
---|
| 689 | |
---|
| 690 | G4double E4 = (A+1-AA)/std::pow((1+A),2)*(gamma*gamma+1-2*gamma*mu)*E1; |
---|
| 691 | G4double omega4 = (1-gamma*mu)/std::sqrt(gamma*gamma+1-2*gamma*mu); |
---|
| 692 | |
---|
| 693 | hadron->SetKineticEnergy ( E3 ); |
---|
| 694 | |
---|
| 695 | G4double M = hadron->GetDefinition()->GetPDGMass(); |
---|
| 696 | G4double pmag = std::sqrt ((E3+M)*(E3+M)-M*M) ; |
---|
[1337] | 697 | G4ThreeVector p ( 0 , pmag*std::sqrt(1-omega3*omega3), pmag*omega3 ); |
---|
[1315] | 698 | |
---|
| 699 | G4double M4 = residual->GetDefinition()->GetPDGMass(); |
---|
| 700 | G4double pmag4 = std::sqrt ((E4+M4)*(E4+M4)-M4*M4) ; |
---|
[1337] | 701 | G4ThreeVector p4 ( 0 , -pmag4*std::sqrt(1-omega4*omega4), pmag4*omega4 ); |
---|
[1315] | 702 | |
---|
| 703 | // Rotate to orginal target rest flame. |
---|
| 704 | p *= rot.inverse(); |
---|
| 705 | hadron->SetMomentum( p ); |
---|
| 706 | // Now hadron had 4 momentum in target rest flame |
---|
| 707 | |
---|
| 708 | // TypeA |
---|
| 709 | p4 *= rot.inverse(); |
---|
| 710 | residual->SetMomentum ( p4 ); |
---|
| 711 | |
---|
| 712 | //TypeB1 |
---|
| 713 | //residual->Set4Momentum ( p4_residual ); |
---|
| 714 | //TypeB2 |
---|
| 715 | //residual->SetMomentum ( p4_residual.v() ); |
---|
| 716 | |
---|
| 717 | // Type A make difference in Momenutum |
---|
| 718 | // Type B1 make difference in Mass of residual |
---|
| 719 | // Type B2 make difference in total energy. |
---|
| 720 | |
---|
| 721 | delete residual; |
---|
| 722 | |
---|
| 723 | } |
---|