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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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: G4PiMinusStopAl |
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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 "G4PiMinusStopAl.hh" |
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37 | |
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38 | #include "globals.hh" |
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39 | #include "Randomize.hh" |
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40 | #include "G4Proton.hh" |
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41 | #include "G4Neutron.hh" |
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42 | #include "G4ParticleTypes.hh" |
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43 | #include "G4ReactionKinematics.hh" |
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44 | #include "G4DynamicParticleVector.hh" |
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45 | #include "G4LorentzVector.hh" |
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46 | #include "G4PiMinusStopMaterial.hh" |
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47 | #include "G4DistributionGenerator.hh" |
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48 | |
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49 | // np/pp production ratio |
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50 | // Experimental values: |
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51 | // R(np/pp) = average (E. Gadioli et al., Phys Rev C36 (1987) 741) |
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52 | G4double G4PiMinusStopAl::npRatio = 4; |
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53 | |
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54 | // Average numbers of final nucleons detected, for N-pair absorption |
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55 | // (R. Madey et al., Phys Rev C25 (1982) 3050 |
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56 | G4double G4PiMinusStopAl::nFinalNucleons = 1.67; |
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57 | |
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58 | // Kinetic energy (MeV) distributions measured for coincident nucleon |
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59 | // emission |
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60 | // (R. Madey et al., Phys Rev C25 (1982) 3050 |
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61 | |
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62 | G4int G4PiMinusStopAl::eKinEntries = 10; |
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63 | |
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64 | G4double G4PiMinusStopAl::eKinData[10] = { 0.23, 0.58, 1.24, 1.52, |
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65 | 1.67, |
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66 | 1.52, 1.24, 0.95, 0.58, 0.23}; |
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67 | |
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68 | G4double G4PiMinusStopAl::eKin[11] = { 5.2, 15., 27., 41.5, |
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69 | 49.6, |
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70 | 57.7, 79.3, 94.4, 114., 125., 140.}; |
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71 | |
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72 | |
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73 | // Opening angle distributions measured for coincident nucleon emission |
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74 | // (P.Heusi et al., Nucl. Phys. A407 (1983) 429 |
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75 | |
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76 | G4int G4PiMinusStopAl::angleEntries = 7; |
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77 | |
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78 | G4double G4PiMinusStopAl::angleData[7] = |
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79 | { 1.43, 1.67, 2.62, 4.29, 7.62, 11.90, 14.76 }; |
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80 | |
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81 | G4double G4PiMinusStopAl::angle[8] = { 1.308997, 1.570796, 1.832596, 2.094395, |
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82 | 2.356194, 2.617994, 2.967060, 3.1415927 }; |
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83 | |
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84 | |
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85 | |
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86 | // Constructor |
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87 | |
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88 | G4PiMinusStopAl::G4PiMinusStopAl() |
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89 | |
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90 | { |
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91 | // Cluster size: nucleon pair, alpha, triton etc. |
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92 | // First implementation: interaction with nucleon pair only |
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93 | _clusterSize = 2; |
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94 | |
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95 | // R ratio |
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96 | theR = 1. / (1. + npRatio); |
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97 | |
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98 | _definitions = new std::vector<G4ParticleDefinition*>(); |
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99 | _momenta = new std::vector<G4LorentzVector*>(); |
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100 | |
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101 | std::vector<double> eKinVector; |
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102 | std::vector<double> eKinDataVector; |
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103 | int i; |
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104 | for (i=0; i<eKinEntries; i++) |
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105 | { |
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106 | eKinVector.push_back(eKin[i]); |
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107 | eKinDataVector.push_back(eKinData[i]); |
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108 | } |
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109 | eKinVector.push_back(eKin[eKinEntries]); |
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110 | _distributionE = new G4DistributionGenerator(eKinVector,eKinDataVector); |
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111 | |
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112 | std::vector<double> angleVector; |
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113 | std::vector<double> angleDataVector; |
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114 | for (i=0; i<angleEntries; i++) |
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115 | { |
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116 | angleVector.push_back(angle[i]); |
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117 | angleDataVector.push_back(angleData[i]); |
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118 | } |
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119 | angleVector.push_back(angle[angleEntries]); |
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120 | _distributionAngle = new G4DistributionGenerator(angleVector,angleDataVector); |
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121 | } |
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122 | |
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123 | |
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124 | // Destructor |
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125 | |
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126 | G4PiMinusStopAl::~G4PiMinusStopAl() |
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127 | {} |
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128 | |
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129 | G4double G4PiMinusStopAl::FinalNucleons() |
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130 | { |
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131 | return nFinalNucleons; |
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132 | } |
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133 | |
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