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 1.5 2010/10/15 22:36:13 dennis Exp $ |
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27 | // GEANT4 tag $Name: hadr-cross-V09-03-12 $ |
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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 | |
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51 | using namespace std; |
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52 | |
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53 | G4NeutronCaptureXS::G4NeutronCaptureXS() |
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54 | : emax(20*MeV),maxZ(92) |
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55 | { |
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56 | // verboseLevel = 0; |
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57 | if(verboseLevel > 0){ |
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58 | G4cout << "G4NeutronCaptureXS::G4NeutronCaptureXS: Initialise for Z < " |
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59 | << maxZ + 1 << G4endl; |
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60 | } |
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61 | data.resize(maxZ+1, 0); |
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62 | isInitialized = false; |
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63 | } |
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64 | |
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65 | G4NeutronCaptureXS::~G4NeutronCaptureXS() |
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66 | { |
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67 | for(G4int i=0; i<=maxZ; ++i) { |
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68 | delete data[i]; |
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69 | } |
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70 | } |
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71 | |
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72 | G4bool |
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73 | G4NeutronCaptureXS::IsApplicable(const G4DynamicParticle*, |
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74 | const G4Element*) |
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75 | { |
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76 | return true; |
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77 | } |
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78 | |
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79 | G4bool |
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80 | G4NeutronCaptureXS::IsIsoApplicable(const G4DynamicParticle*, |
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81 | G4int /*ZZ*/, G4int /*AA*/) |
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82 | { |
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83 | return false; |
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84 | } |
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85 | |
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86 | |
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87 | G4double |
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88 | G4NeutronCaptureXS::GetCrossSection(const G4DynamicParticle* aParticle, |
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89 | const G4Element* elm, |
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90 | G4double) |
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91 | { |
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92 | G4double xs = 0.0; |
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93 | G4double ekin = aParticle->GetKineticEnergy(); |
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94 | if(ekin > emax) { return xs; } |
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95 | |
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96 | G4int Z = G4int(elm->GetZ()); |
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97 | G4PhysicsVector* pv = data[Z]; |
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98 | |
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99 | // element was not initialised |
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100 | if(!pv) { |
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101 | Initialise(Z); |
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102 | pv = data[Z]; |
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103 | if(!pv) { return xs; } |
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104 | } |
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105 | |
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106 | G4int n = pv->GetVectorLength() - 1; |
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107 | G4double e1 = pv->Energy(0); |
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108 | G4double e2 = pv->Energy(n); |
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109 | if(ekin < e1) { xs = (*pv)[0]*std::sqrt(e1/ekin); } |
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110 | else if(ekin <= e2) { xs = pv->Value(ekin); } |
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111 | |
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112 | if(verboseLevel > 0){ |
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113 | G4cout << "ekin= " << ekin << ", xs= " << xs << G4endl; |
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114 | } |
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115 | return xs; |
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116 | } |
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117 | |
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118 | |
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119 | void |
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120 | G4NeutronCaptureXS::BuildPhysicsTable(const G4ParticleDefinition& p) |
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121 | { |
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122 | if(verboseLevel > 0){ |
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123 | G4cout << "G4NeutronCaptureXS::BuildPhysicsTable for " |
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124 | << p.GetParticleName() << G4endl; |
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125 | } |
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126 | if(isInitialized || p.GetParticleName() != "neutron") { return; } |
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127 | isInitialized = true; |
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128 | |
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129 | |
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130 | // check environment variable |
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131 | // Build the complete string identifying the file with the data set |
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132 | char* path = getenv("G4NEUTRONXSDATA"); |
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133 | if (!path){ |
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134 | G4cout << "G4NEUTRONXSDATA environment variable not set" << G4endl; |
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135 | } |
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136 | |
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137 | // Access to elements |
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138 | const G4ElementTable* theElmTable = G4Element::GetElementTable(); |
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139 | size_t numOfElm = G4Element::GetNumberOfElements(); |
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140 | if(numOfElm > 0) { |
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141 | for(size_t i=0; i<numOfElm; ++i) { |
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142 | G4int Z = G4int(((*theElmTable)[i])->GetZ()); |
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143 | if(Z < 1) { Z = 1; } |
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144 | else if(Z > maxZ) { Z = maxZ; } |
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145 | //G4cout << "Z= " << Z << G4endl; |
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146 | // Initialisation |
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147 | if(!data[Z]) { Initialise(Z, path); } |
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148 | } |
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149 | } |
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150 | } |
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151 | |
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152 | void |
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153 | G4NeutronCaptureXS::DumpPhysicsTable(const G4ParticleDefinition&) |
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154 | {} |
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155 | |
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156 | |
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157 | void |
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158 | G4NeutronCaptureXS::Initialise(G4int Z, const char* p) |
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159 | { |
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160 | if(data[Z]) { return; } |
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161 | const char* path = p; |
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162 | if(!p) { |
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163 | // check environment variable |
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164 | // Build the complete string identifying the file with the data set |
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165 | path = getenv("G4NEUTRONXSDATA"); |
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166 | if (!path) { |
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167 | if(verboseLevel > 1) { |
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168 | G4cout << "G4NEUTRONXSDATA environment variable not set" << G4endl; |
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169 | } |
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170 | return; |
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171 | } |
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172 | } |
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173 | |
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174 | // upload data from file |
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175 | data[Z] = new G4PhysicsLogVector(); |
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176 | |
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177 | std::ostringstream ost; |
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178 | ost << path << "/cap" << Z ; |
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179 | std::ifstream filein(ost.str().c_str()); |
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180 | if (!(filein)) { |
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181 | G4cout << " file " << ost << " is not opened" << G4endl; |
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182 | }else{ |
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183 | if(verboseLevel > 1) { |
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184 | G4cout << ost << " is opened" << G4endl; |
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185 | } |
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186 | // retrieve data from DB |
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187 | data[Z]->Retrieve(filein, true); |
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188 | } |
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189 | } |
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