[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 | // File name: G4PiMinusStopC |
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| 27 | // |
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| 28 | // Author: Maria Grazia Pia (pia@genova.infn.it) |
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| 29 | // |
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| 30 | // Creation date: 8 May 1998 |
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| 31 | // |
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| 32 | // ------------------------------------------------------------------- |
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| 33 | |
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| 34 | #include "G4ios.hh" |
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| 35 | |
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| 36 | #include "G4PiMinusStopC.hh" |
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| 37 | |
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| 38 | #include <vector> |
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| 39 | |
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| 40 | #include "globals.hh" |
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| 41 | #include "Randomize.hh" |
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| 42 | #include "G4Proton.hh" |
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| 43 | #include "G4Neutron.hh" |
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| 44 | #include "G4ParticleTypes.hh" |
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| 45 | #include "G4ReactionKinematics.hh" |
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| 46 | #include "G4DynamicParticleVector.hh" |
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| 47 | #include "G4LorentzVector.hh" |
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| 48 | #include "G4NucleiPropertiesTable.hh" |
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| 49 | #include "G4PiMinusStopMaterial.hh" |
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| 50 | #include "G4DistributionGenerator.hh" |
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| 51 | |
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| 52 | // np/pp production ratio |
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| 53 | // Experimental values: |
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| 54 | // R(np/pp) = 6.3 +- 1.4 (P. Heusi et al. (Nucl. Phys. A407, 429 [1983]) |
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| 55 | // R = 5.0 +- 1.5 (Ozaki et al.) |
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| 56 | // R = 8.8 +- 1.3 (Lee et al.) |
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| 57 | // R = 2.4 +- 1.0 (Nordberg et al.) |
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| 58 | // Use average value of the first three ones |
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| 59 | G4double G4PiMinusStopC::npRatio = 6.7; |
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| 60 | |
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| 61 | // Average numbers of final nucleons detected, for N-pair absorption |
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| 62 | // R. Madey et al., Phys. Rev. C25(1982) 3050 |
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| 63 | G4double G4PiMinusStopC::nFinalNucleons = 1.77; |
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| 64 | |
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| 65 | // Kinetic energy (MeV) distributions measured for coincident nucleon |
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| 66 | // emission |
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| 67 | // P. Heusi et al., Nucl. Phys. A407(1983) 429 |
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| 68 | |
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| 69 | G4int G4PiMinusStopC::eKinEntries = 21; |
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| 70 | |
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| 71 | G4double G4PiMinusStopC::eKinData[21] = { 0.031, 0.045, 0.06, 0.09, |
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| 72 | 0.11, 0.116, 0.14, |
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| 73 | 0.18, 0.21, 0.25, |
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| 74 | 0.3, 0.32, 0.31, 0.3, |
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| 75 | 0.25, 0.18, 0.16, |
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| 76 | 0.15, 0.08, 0.05, 0.01}; |
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| 77 | |
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| 78 | G4double G4PiMinusStopC::eKin[22] = { 8., 17.5, 21., 24.5, |
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| 79 | 27.5, 31., 33.5, |
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| 80 | 37.5, 42.5, 46.4, |
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| 81 | 49., 52.5, 57.5, 62.5, |
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| 82 | 67.5, 72.5, 75., |
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| 83 | 77.5, 82.5, 87.5, 92.5, 110. }; |
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| 84 | |
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| 85 | //G4double G4PiMinusStopC::eKin[22] = { 15., 20., 22., 25., |
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| 86 | // 30., 32., 36., |
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| 87 | // 40., 45., 48., |
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| 88 | // 50., 54., 60., 65., |
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| 89 | // 70., 75., 78., |
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| 90 | // 80., 86., 90., 95., 100. }; |
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| 91 | |
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| 92 | // Opening angle distributions measured for coincident nucleon emission |
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| 93 | // R. Hartmann et al., Nucl. Phys. A308 (1978) 345 |
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| 94 | |
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| 95 | G4int G4PiMinusStopC::angleEntries = 7; |
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| 96 | |
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| 97 | G4double G4PiMinusStopC::angleData[7] = |
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| 98 | { 1.43, 1.67, 2.62, 4.29, 7.62, 11.90, 14.76 }; |
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| 99 | |
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| 100 | G4double G4PiMinusStopC::angle[8] = { 1.308997, 1.570796, 1.832596, 2.094395, |
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| 101 | 2.356194, 2.617994, 2.967060, 3.1415927 }; |
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| 102 | |
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| 103 | |
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| 104 | |
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| 105 | // Constructor |
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| 106 | |
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| 107 | G4PiMinusStopC::G4PiMinusStopC() |
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| 108 | |
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| 109 | { |
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| 110 | // Cluster size: nucleon pair, alpha, triton etc. |
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| 111 | // First implementation: interaction with nucleon pair only |
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| 112 | _clusterSize = 2; |
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| 113 | |
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| 114 | // R ratio |
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| 115 | theR = 1. / (1. + npRatio); |
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| 116 | |
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| 117 | _definitions = new std::vector<G4ParticleDefinition*>(); |
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| 118 | _momenta = new std::vector<G4LorentzVector*>(); |
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| 119 | |
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| 120 | std::vector<double> eKinVector; |
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| 121 | std::vector<double> eKinDataVector; |
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| 122 | int i; |
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| 123 | for (i=0; i<eKinEntries; i++) |
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| 124 | { |
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| 125 | eKinVector.push_back(eKin[i]); |
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| 126 | eKinDataVector.push_back(eKinData[i]); |
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| 127 | } |
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| 128 | eKinVector.push_back(eKin[eKinEntries]); |
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| 129 | _distributionE = new G4DistributionGenerator(eKinVector,eKinDataVector); |
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| 130 | |
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| 131 | std::vector<double> angleVector; |
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| 132 | std::vector<double> angleDataVector; |
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| 133 | for (i=0; i<angleEntries; i++) |
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| 134 | { |
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| 135 | angleVector.push_back(angle[i]); |
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| 136 | angleDataVector.push_back(angleData[i]); |
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| 137 | } |
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| 138 | angleVector.push_back(angle[angleEntries]); |
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| 139 | _distributionAngle = new G4DistributionGenerator(angleVector,angleDataVector); |
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| 140 | } |
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| 141 | |
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| 142 | |
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| 143 | // Destructor |
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| 144 | |
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| 145 | G4PiMinusStopC::~G4PiMinusStopC() |
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| 146 | {} |
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| 147 | |
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| 148 | G4double G4PiMinusStopC::FinalNucleons() |
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| 149 | { |
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| 150 | return nFinalNucleons; |
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| 151 | } |
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| 152 | |
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