1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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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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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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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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