[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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| 26 | // $Id: G4NeutronCaptureXS.cc,v 1.2 2009/11/19 12:36:53 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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| 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: G4NeutronCaptureXS |
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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 "G4NeutronCaptureXS.hh" |
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| 42 | #include "G4Element.hh" |
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| 43 | #include "G4ElementTable.hh" |
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| 44 | #include "G4PhysicsLogVector.hh" |
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| 45 | #include "G4PhysicsVector.hh" |
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| 46 | |
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| 47 | #include <iostream> |
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| 48 | #include <fstream> |
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| 49 | #include <sstream> |
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| 50 | using namespace std; |
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| 51 | |
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| 52 | G4NeutronCaptureXS::G4NeutronCaptureXS() |
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| 53 | { |
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| 54 | verboseLevel = 0; |
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| 55 | emax = 20.*MeV; |
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| 56 | G4cout << "G4NeutronCaptureXS::G4NeutronCaptureXS: Initialise " << G4endl; |
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| 57 | for(G4int i=0; i<93; ++i) { |
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| 58 | data[i] = 0; |
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| 59 | } |
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| 60 | isInitialized = false; |
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| 61 | } |
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| 62 | |
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| 63 | G4NeutronCaptureXS::~G4NeutronCaptureXS() |
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| 64 | { |
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| 65 | for(G4int i=0; i<92; ++i) { |
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| 66 | delete data[i]; |
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| 67 | } |
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| 68 | } |
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| 69 | |
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| 70 | G4bool |
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| 71 | G4NeutronCaptureXS::IsApplicable(const G4DynamicParticle*, |
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| 72 | const G4Element*) |
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| 73 | { |
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| 74 | return true; |
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| 75 | } |
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| 76 | |
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| 77 | G4bool |
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| 78 | G4NeutronCaptureXS::IsZAApplicable(const G4DynamicParticle*, |
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| 79 | G4double /*ZZ*/, G4double /*AA*/) |
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| 80 | { |
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| 81 | return false; |
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| 82 | } |
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| 83 | |
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| 84 | |
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| 85 | G4double |
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| 86 | G4NeutronCaptureXS::GetCrossSection(const G4DynamicParticle* aParticle, |
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| 87 | const G4Element* elm, |
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| 88 | G4double) |
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| 89 | { |
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| 90 | G4double xs = 0.0; |
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| 91 | G4double ekin = aParticle->GetKineticEnergy(); |
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| 92 | if(ekin > emax) return xs; |
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| 93 | |
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| 94 | G4int Z = G4int(elm->GetZ()); |
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| 95 | G4PhysicsVector* pv = data[Z]; |
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| 96 | |
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| 97 | // element was not initialised |
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| 98 | if(!pv) { |
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| 99 | Initialise(Z); |
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| 100 | pv = data[Z]; |
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| 101 | if(!pv) return xs; |
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| 102 | } |
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| 103 | |
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| 104 | G4int n = pv->GetVectorLength() - 1; |
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| 105 | G4double e1 = pv->Energy(0); |
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| 106 | G4double e2 = pv->Energy(n); |
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| 107 | if(ekin < e1) { xs = (*pv)[0]*std::sqrt(e1/ekin); } |
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| 108 | else if(ekin <= e2) { xs = pv->Value(ekin); } |
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| 109 | |
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| 110 | if(verboseLevel > 0){ |
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| 111 | G4cout << "ekin= " << ekin << ", xs= " << xs << G4endl; |
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| 112 | } |
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| 113 | return xs; |
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| 114 | } |
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| 115 | |
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| 116 | |
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| 117 | void |
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| 118 | G4NeutronCaptureXS::BuildPhysicsTable(const G4ParticleDefinition& p) |
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| 119 | { |
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| 120 | G4cout << "G4NeutronCaptureXS::BuildPhysicsTable: " << G4endl; |
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| 121 | G4cout << p.GetParticleName() << G4endl; |
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| 122 | if(p.GetParticleName() != "neutron") { |
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| 123 | return; |
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| 124 | } |
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| 125 | if(isInitialized) return; |
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| 126 | isInitialized = true; |
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| 127 | |
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| 128 | |
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| 129 | // check environment variable |
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| 130 | // Build the complete string identifying the file with the data set |
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| 131 | char* path = getenv("G4NEUTRONXS"); |
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| 132 | if (!path){ |
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| 133 | G4cout << "G4NEUTRONXS environment variable not set" << G4endl; |
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| 134 | } |
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| 135 | |
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| 136 | // Access to elements |
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| 137 | const G4ElementTable* theElmTable = G4Element::GetElementTable(); |
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| 138 | size_t numOfElm = G4Element::GetNumberOfElements(); |
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| 139 | if(numOfElm > 0) { |
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| 140 | for(size_t i=0; i<numOfElm; ++i) { |
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| 141 | G4int Z = G4int(((*theElmTable)[i])->GetZ()); |
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| 142 | if(Z < 1) Z = 1; |
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| 143 | else if(Z > 92) Z = 92; |
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| 144 | //G4cout << "Z= " << Z << G4endl; |
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| 145 | // Initialisation |
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| 146 | if(!data[Z]) { Initialise(Z, path); } |
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| 147 | } |
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| 148 | } |
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| 149 | } |
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| 150 | |
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| 151 | void |
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| 152 | G4NeutronCaptureXS::DumpPhysicsTable(const G4ParticleDefinition&) |
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| 153 | { |
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| 154 | } |
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| 155 | |
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| 156 | void |
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| 157 | G4NeutronCaptureXS::Initialise(G4int Z, const char* p) |
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| 158 | { |
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| 159 | if(data[Z]) return; |
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| 160 | const char* path = p; |
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| 161 | if(!p) { |
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| 162 | // check environment variable |
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| 163 | // Build the complete string identifying the file with the data set |
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| 164 | path = getenv("G4NEUTRONXS"); |
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| 165 | if (!path) { |
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| 166 | if(verboseLevel > 1) { |
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| 167 | G4cout << "G4NEUTRONXS environment variable not set" << G4endl; |
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| 168 | } |
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| 169 | return; |
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| 170 | } |
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| 171 | } |
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| 172 | |
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| 173 | // upload data from file |
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| 174 | data[Z] = new G4PhysicsLogVector(); |
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| 175 | |
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| 176 | std::ostringstream ost; |
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| 177 | ost << path << "/cap" << Z ; |
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| 178 | std::ifstream filein(ost.str().c_str()); |
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| 179 | if (!(filein)) { |
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| 180 | G4cout << " file " << ost << " is not opened" << G4endl; |
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| 181 | }else{ |
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| 182 | if(verboseLevel > 1) { |
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| 183 | G4cout << ost << " is opened" << G4endl; |
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| 184 | } |
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| 185 | // retrieve data from DB |
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| 186 | data[Z]->Retrieve(filein, true); |
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| 187 | } |
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| 188 | } |
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