[1197] | 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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[1315] | 26 | // $Id: G4NeutronElasticXS.cc,v 1.4 2010/06/03 11:50:21 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-04-beta-cand-01 $ |
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[1197] | 28 | // |
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| 29 | // ------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // GEANT4 Class file |
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| 32 | // |
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| 33 | // |
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| 34 | // File name: G4NeutronElasticXS |
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| 35 | // |
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| 36 | // Author Ivantchenko, Geant4, 3-Aug-09 |
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| 37 | // |
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| 38 | // Modifications: |
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| 39 | // |
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| 40 | |
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| 41 | #include "G4NeutronElasticXS.hh" |
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| 42 | #include "G4Neutron.hh" |
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| 43 | #include "G4DynamicParticle.hh" |
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| 44 | #include "G4Element.hh" |
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| 45 | #include "G4ElementTable.hh" |
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| 46 | #include "G4PhysicsLogVector.hh" |
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| 47 | #include "G4PhysicsVector.hh" |
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| 48 | #include "G4GlauberGribovCrossSection.hh" |
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| 49 | #include "G4NistManager.hh" |
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| 50 | |
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| 51 | #include <iostream> |
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| 52 | #include <fstream> |
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| 53 | #include <sstream> |
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| 54 | using namespace std; |
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| 55 | |
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| 56 | G4NeutronElasticXS::G4NeutronElasticXS() |
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| 57 | { |
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| 58 | verboseLevel = 0; |
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| 59 | G4cout << "G4NeutronElasticXS::G4NeutronElasticXS: Initialise " << G4endl; |
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| 60 | for(G4int i=0; i<93; ++i) { |
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| 61 | data[i] = 0; |
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| 62 | coeff[i]= 1.0; |
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| 63 | } |
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| 64 | ggXsection = new G4GlauberGribovCrossSection(); |
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| 65 | isInitialized = false; |
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| 66 | } |
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| 67 | |
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| 68 | G4NeutronElasticXS::~G4NeutronElasticXS() |
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| 69 | { |
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| 70 | for(G4int i=0; i<92; ++i) { |
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| 71 | delete data[i]; |
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| 72 | } |
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| 73 | } |
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| 74 | |
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| 75 | G4bool |
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| 76 | G4NeutronElasticXS::IsApplicable(const G4DynamicParticle*, |
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| 77 | const G4Element*) |
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| 78 | { |
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| 79 | return true; |
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| 80 | } |
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| 81 | |
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| 82 | G4bool |
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| 83 | G4NeutronElasticXS::IsZAApplicable(const G4DynamicParticle*, |
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| 84 | G4double /*ZZ*/, G4double /*AA*/) |
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| 85 | { |
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| 86 | return false; |
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| 87 | } |
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| 88 | |
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| 89 | |
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| 90 | G4double |
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| 91 | G4NeutronElasticXS::GetCrossSection(const G4DynamicParticle* aParticle, |
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| 92 | const G4Element* elm, |
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| 93 | G4double) |
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| 94 | { |
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| 95 | G4double xs = 0.0; |
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| 96 | G4double ekin = aParticle->GetKineticEnergy(); |
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| 97 | |
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| 98 | G4int Z = G4int(elm->GetZ()); |
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| 99 | G4PhysicsVector* pv = data[Z]; |
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| 100 | // G4cout << "G4NeutronElasticXS::GetCrossSection e= " << ekin << " Z= " << Z << G4endl; |
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| 101 | |
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| 102 | // element was not initialised |
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| 103 | if(!pv) { |
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| 104 | Initialise(Z); |
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| 105 | pv = data[Z]; |
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| 106 | if(!pv) return xs; |
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| 107 | } |
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| 108 | |
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| 109 | G4double e1 = pv->Energy(0); |
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| 110 | if(ekin <= e1) return (*pv)[0]; |
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| 111 | |
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| 112 | G4int n = pv->GetVectorLength() - 1; |
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| 113 | G4double e2 = pv->Energy(n); |
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| 114 | if(ekin <= e2) { |
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| 115 | xs = pv->Value(ekin); |
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| 116 | } else { |
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| 117 | ggXsection->GetCrossSection(aParticle, elm); |
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| 118 | xs = coeff[Z]*ggXsection->GetElasticGlauberGribovXsc(); |
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| 119 | } |
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| 120 | |
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| 121 | if(verboseLevel > 0){ |
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| 122 | G4cout << "ekin= " << ekin << ", XSinel= " << xs << G4endl; |
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| 123 | } |
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| 124 | return xs; |
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| 125 | } |
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| 126 | |
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| 127 | |
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| 128 | void |
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| 129 | G4NeutronElasticXS::BuildPhysicsTable(const G4ParticleDefinition& p) |
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| 130 | { |
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| 131 | G4cout << "G4NeutronElasticXS::BuildPhysicsTable: " << G4endl; |
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| 132 | G4cout << p.GetParticleName() << G4endl; |
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| 133 | if(p.GetParticleName() != "neutron") { |
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| 134 | return; |
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| 135 | } |
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| 136 | if(isInitialized) return; |
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| 137 | isInitialized = true; |
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| 138 | |
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| 139 | |
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| 140 | // check environment variable |
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| 141 | // Build the complete string identifying the file with the data set |
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[1315] | 142 | char* path = getenv("G4NEUTRONXSDATA"); |
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[1197] | 143 | if (!path){ |
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[1315] | 144 | G4cout << "G4NEUTRONXSDATA environment variable not set" << G4endl; |
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[1197] | 145 | } |
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| 146 | |
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| 147 | G4DynamicParticle* dynParticle = |
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| 148 | new G4DynamicParticle(G4Neutron::Neutron(),G4ThreeVector(1,0,0),1); |
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| 149 | |
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| 150 | // Access to elements |
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| 151 | const G4ElementTable* theElmTable = G4Element::GetElementTable(); |
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| 152 | size_t numOfElm = G4Element::GetNumberOfElements(); |
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| 153 | if(numOfElm > 0) { |
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| 154 | for(size_t i=0; i<numOfElm; ++i) { |
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| 155 | G4int Z = G4int(((*theElmTable)[i])->GetZ()); |
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| 156 | if(Z < 1) Z = 1; |
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| 157 | else if(Z > 92) Z = 92; |
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| 158 | //G4cout << "Z= " << Z << G4endl; |
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| 159 | // Initialisation |
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| 160 | if(!data[Z]) { Initialise(Z, dynParticle, path); } |
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| 161 | } |
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| 162 | } |
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| 163 | delete dynParticle; |
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| 164 | } |
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| 165 | |
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| 166 | void |
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| 167 | G4NeutronElasticXS::DumpPhysicsTable(const G4ParticleDefinition&) |
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| 168 | { |
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| 169 | } |
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| 170 | |
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| 171 | void |
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| 172 | G4NeutronElasticXS::Initialise(G4int Z, G4DynamicParticle* dp, |
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| 173 | const char* p) |
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| 174 | { |
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| 175 | if(data[Z]) return; |
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| 176 | const char* path = p; |
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| 177 | if(!p) { |
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| 178 | // check environment variable |
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| 179 | // Build the complete string identifying the file with the data set |
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[1315] | 180 | path = getenv("G4NEUTRONXSDATA"); |
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[1197] | 181 | if (!path) { |
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| 182 | if(verboseLevel > 1) { |
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[1315] | 183 | G4cout << "G4NEUTRONXSDATA environment variable not set" << G4endl; |
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[1197] | 184 | } |
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| 185 | return; |
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| 186 | } |
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| 187 | } |
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| 188 | G4DynamicParticle* dynParticle = dp; |
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| 189 | if(!dp) { |
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| 190 | dynParticle = |
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| 191 | new G4DynamicParticle(G4Neutron::Neutron(),G4ThreeVector(1,0,0),1); |
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| 192 | } |
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| 193 | |
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| 194 | const G4Element* Elem = |
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| 195 | G4NistManager::Instance()->FindOrBuildElement(Z, true); |
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| 196 | |
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| 197 | // upload data from file |
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| 198 | data[Z] = new G4PhysicsLogVector(); |
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| 199 | |
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| 200 | std::ostringstream ost; |
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| 201 | ost << path << "/elast" << Z ; |
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| 202 | std::ifstream filein(ost.str().c_str()); |
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| 203 | if (!(filein)) { |
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| 204 | G4cout << " file " << ost << " is not opened" << G4endl; |
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| 205 | }else{ |
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| 206 | if(verboseLevel > 1) { |
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| 207 | G4cout << ost << " is opened" << G4endl; |
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| 208 | } |
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| 209 | // retrieve data from DB |
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| 210 | data[Z]->Retrieve(filein, true); |
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| 211 | |
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| 212 | // smooth transition |
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| 213 | size_t n = data[Z]->GetVectorLength() - 1; |
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| 214 | G4double emax = data[Z]->Energy(n); |
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| 215 | G4double sig1 = (*data[Z])[n]; |
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| 216 | dynParticle->SetKineticEnergy(emax); |
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| 217 | ggXsection->GetCrossSection(dynParticle, Elem); |
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| 218 | G4double sig2 = ggXsection->GetElasticGlauberGribovXsc(); |
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[1315] | 219 | if(sig2 > 0.) { coeff[Z] = sig1/sig2; } |
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[1197] | 220 | } |
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[1315] | 221 | if(!dp) { delete dynParticle; } |
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[1197] | 222 | } |
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