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 | // |
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27 | // $Id: G4VDecayChannel.cc,v 1.18 2006/06/29 19:26:20 gunter Exp $ |
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28 | // GEANT4 tag $Name: HEAD $ |
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29 | // |
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30 | // |
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31 | // ------------------------------------------------------------ |
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32 | // GEANT 4 class header file |
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33 | // |
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34 | // History: first implementation, based on object model of |
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35 | // 27 July 1996 H.Kurashige |
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36 | // 30 May 1997 H.Kurashige |
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37 | // 23 Mar. 2000 H.Weber : add GetAngularMomentum |
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38 | // ------------------------------------------------------------ |
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39 | |
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40 | #include "G4ParticleDefinition.hh" |
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41 | #include "G4ParticleTable.hh" |
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42 | #include "G4DecayTable.hh" |
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43 | #include "G4DecayProducts.hh" |
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44 | #include "G4VDecayChannel.hh" |
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45 | |
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46 | const G4String G4VDecayChannel::noName = " "; |
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47 | |
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48 | G4VDecayChannel::G4VDecayChannel(const G4String &aName, G4int Verbose) |
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49 | :kinematics_name(aName), |
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50 | rbranch(0.0), |
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51 | numberOfDaughters(0), |
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52 | parent_name(0), daughters_name(0), |
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53 | particletable(0), |
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54 | parent(0), daughters(0), |
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55 | parent_mass(0.0), daughters_mass(0), |
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56 | verboseLevel(Verbose) |
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57 | { |
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58 | // set pointer to G4ParticleTable (static and singleton object) |
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59 | particletable = G4ParticleTable::GetParticleTable(); |
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60 | } |
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61 | |
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62 | G4VDecayChannel::G4VDecayChannel(const G4String &aName, |
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63 | const G4String& theParentName, |
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64 | G4double theBR, |
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65 | G4int theNumberOfDaughters, |
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66 | const G4String& theDaughterName1, |
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67 | const G4String& theDaughterName2, |
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68 | const G4String& theDaughterName3, |
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69 | const G4String& theDaughterName4 ) |
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70 | :kinematics_name(aName), |
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71 | rbranch(theBR), |
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72 | numberOfDaughters(theNumberOfDaughters), |
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73 | parent_name(0), daughters_name(0), |
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74 | particletable(0), |
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75 | parent(0), daughters(0), |
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76 | parent_mass(0.0), daughters_mass(0), |
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77 | verboseLevel(1) |
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78 | { |
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79 | // set pointer to G4ParticleTable (static and singleton object) |
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80 | particletable = G4ParticleTable::GetParticleTable(); |
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81 | |
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82 | // parent name |
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83 | parent_name = new G4String(theParentName); |
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84 | |
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85 | // cleate array |
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86 | daughters_name = new G4String*[numberOfDaughters]; |
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87 | for (G4int index=0;index<numberOfDaughters;index++) daughters_name[index]=0; |
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88 | |
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89 | // daughters' name |
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90 | if (numberOfDaughters>0) daughters_name[0] = new G4String(theDaughterName1); |
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91 | if (numberOfDaughters>1) daughters_name[1] = new G4String(theDaughterName2); |
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92 | if (numberOfDaughters>2) daughters_name[2] = new G4String(theDaughterName3); |
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93 | if (numberOfDaughters>3) daughters_name[3] = new G4String(theDaughterName4); |
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94 | } |
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95 | |
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96 | |
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97 | |
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98 | G4VDecayChannel::G4VDecayChannel(const G4VDecayChannel &right) |
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99 | { |
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100 | kinematics_name = right.kinematics_name; |
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101 | verboseLevel = right.verboseLevel; |
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102 | rbranch = right.rbranch; |
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103 | |
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104 | // copy parent name |
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105 | parent_name = new G4String(*right.parent_name); |
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106 | parent = 0; |
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107 | parent_mass = 0.0; |
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108 | |
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109 | //create array |
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110 | numberOfDaughters = right.numberOfDaughters; |
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111 | |
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112 | if ( numberOfDaughters >0 ) { |
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113 | daughters_name = new G4String*[numberOfDaughters]; |
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114 | //copy daughters name |
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115 | for (G4int index=0; index < numberOfDaughters; index++) |
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116 | { |
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117 | daughters_name[index] = new G4String(*right.daughters_name[index]); |
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118 | } |
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119 | } |
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120 | |
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121 | // |
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122 | daughters_mass = 0; |
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123 | daughters = 0; |
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124 | |
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125 | // particle table |
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126 | particletable = G4ParticleTable::GetParticleTable(); |
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127 | } |
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128 | |
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129 | G4VDecayChannel & G4VDecayChannel::operator=(const G4VDecayChannel &right) |
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130 | { |
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131 | if (this != &right) { |
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132 | kinematics_name = right.kinematics_name; |
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133 | verboseLevel = right.verboseLevel; |
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134 | rbranch = right.rbranch; |
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135 | |
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136 | // copy parent name |
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137 | parent_name = new G4String(*right.parent_name); |
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138 | |
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139 | // clear daughters_name array |
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140 | ClearDaughtersName(); |
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141 | |
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142 | // recreate array |
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143 | numberOfDaughters = right.numberOfDaughters; |
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144 | if ( numberOfDaughters >0 ) { |
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145 | daughters_name = new G4String*[numberOfDaughters]; |
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146 | //copy daughters name |
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147 | for (G4int index=0; index < numberOfDaughters; index++) { |
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148 | daughters_name[index] = new G4String(*right.daughters_name[index]); |
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149 | } |
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150 | } |
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151 | } |
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152 | |
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153 | // |
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154 | parent = 0; |
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155 | daughters = 0; |
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156 | parent_mass = 0.0; |
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157 | daughters_mass = 0; |
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158 | |
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159 | // particle table |
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160 | particletable = G4ParticleTable::GetParticleTable(); |
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161 | |
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162 | return *this; |
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163 | } |
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164 | |
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165 | |
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166 | G4VDecayChannel::~G4VDecayChannel() |
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167 | { |
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168 | if (parent_name != 0) delete parent_name; |
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169 | ClearDaughtersName(); |
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170 | if (daughters_mass != 0) delete [] daughters_mass; |
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171 | } |
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172 | |
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173 | void G4VDecayChannel::ClearDaughtersName() |
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174 | { |
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175 | if ( daughters_name != 0) { |
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176 | if (numberOfDaughters>0) { |
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177 | #ifdef G4VERBOSE |
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178 | if (verboseLevel>1) { |
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179 | G4cout << "G4VDecayChannel::ClearDaughtersName "; |
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180 | G4cout << "clear all daughters " << G4endl; |
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181 | } |
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182 | #endif |
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183 | for (G4int index=0; index < numberOfDaughters; index++) { |
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184 | if (daughters_name[index] != 0) delete daughters_name[index]; |
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185 | } |
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186 | } |
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187 | delete [] daughters_name; |
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188 | daughters_name = 0; |
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189 | } |
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190 | // |
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191 | if (daughters != 0) delete [] daughters; |
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192 | if (daughters_mass != 0) delete [] daughters_mass; |
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193 | daughters = 0; |
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194 | daughters_mass = 0; |
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195 | |
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196 | numberOfDaughters = 0; |
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197 | } |
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198 | |
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199 | void G4VDecayChannel::SetNumberOfDaughters(G4int size) |
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200 | { |
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201 | if (size >0) { |
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202 | // remove old contents |
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203 | ClearDaughtersName(); |
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204 | // cleate array |
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205 | daughters_name = new G4String*[size]; |
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206 | for (G4int index=0;index<size;index++) daughters_name[index]=0; |
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207 | numberOfDaughters = size; |
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208 | } |
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209 | } |
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210 | |
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211 | void G4VDecayChannel::SetDaughter(G4int anIndex, |
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212 | const G4String &particle_name) |
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213 | { |
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214 | // check numberOfDaughters is positive |
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215 | if (numberOfDaughters<=0) { |
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216 | #ifdef G4VERBOSE |
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217 | if (verboseLevel>0) { |
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218 | G4cout << "G4VDecayChannel::SetDaughter: "; |
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219 | G4cout << "Number of daughters is not defined" << G4endl; |
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220 | } |
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221 | #endif |
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222 | return; |
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223 | } |
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224 | |
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225 | // check existence of daughters_name array |
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226 | if (daughters_name == 0) { |
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227 | // cleate array |
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228 | daughters_name = new G4String*[numberOfDaughters]; |
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229 | for (G4int index=0;index<numberOfDaughters;index++) { |
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230 | daughters_name[index]=0; |
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231 | } |
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232 | } |
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233 | |
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234 | // check an index |
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235 | if ( (anIndex<0) || (anIndex>=numberOfDaughters) ) { |
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236 | #ifdef G4VERBOSE |
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237 | if (verboseLevel>0) { |
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238 | G4cout << "G4VDecayChannel::SetDaughter"; |
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239 | G4cout << "index out of range " << anIndex << G4endl; |
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240 | } |
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241 | #endif |
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242 | } else { |
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243 | // delete the old name if it exists |
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244 | if (daughters_name[anIndex]!=0) delete daughters_name[anIndex]; |
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245 | // fill the name |
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246 | daughters_name[anIndex] = new G4String(particle_name); |
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247 | // refill the array of daughters[] if it exists |
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248 | if (daughters != 0) FillDaughters(); |
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249 | #ifdef G4VERBOSE |
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250 | if (verboseLevel>1) { |
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251 | G4cout << "G4VDecayChannel::SetDaughter[" << anIndex <<"] :"; |
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252 | G4cout << daughters_name[anIndex] << ":" << *daughters_name[anIndex]<<G4endl; |
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253 | } |
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254 | #endif |
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255 | } |
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256 | } |
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257 | |
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258 | void G4VDecayChannel::SetDaughter(G4int anIndex, const G4ParticleDefinition * parent_type) |
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259 | { |
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260 | if (parent_type != 0) SetDaughter(anIndex, parent_type->GetParticleName()); |
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261 | } |
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262 | |
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263 | void G4VDecayChannel::FillDaughters() |
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264 | { |
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265 | G4int index; |
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266 | |
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267 | #ifdef G4VERBOSE |
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268 | if (verboseLevel>1) G4cout << "G4VDecayChannel::FillDaughters()" <<G4endl; |
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269 | #endif |
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270 | if (daughters != 0) delete [] daughters; |
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271 | |
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272 | // parent mass |
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273 | if (parent == 0) FillParent(); |
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274 | G4double parentmass = parent->GetPDGMass(); |
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275 | |
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276 | // |
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277 | G4double sumofdaughtermass = 0.0; |
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278 | if ((numberOfDaughters <=0) || (daughters_name == 0) ){ |
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279 | #ifdef G4VERBOSE |
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280 | if (verboseLevel>0) { |
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281 | G4cout << "G4VDecayChannel::FillDaughters "; |
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282 | G4cout << "[ " << parent->GetParticleName() << " ]"; |
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283 | G4cout << "numberOfDaughters is not defined yet"; |
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284 | } |
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285 | #endif |
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286 | daughters = 0; |
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287 | G4Exception("G4VDecayChannel::FillDaughters", |
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288 | "can not fill daughters", FatalException, |
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289 | "numberOfDaughters is not defined yet"); |
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290 | } |
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291 | |
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292 | //create and set the array of pointers to daughter particles |
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293 | daughters = new G4ParticleDefinition*[numberOfDaughters]; |
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294 | if (daughters_mass != 0) delete [] daughters_mass; |
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295 | daughters_mass = new G4double[numberOfDaughters]; |
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296 | // loop over all daughters |
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297 | for (index=0; index < numberOfDaughters; index++) { |
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298 | if (daughters_name[index] == 0) { |
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299 | // daughter name is not defined |
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300 | #ifdef G4VERBOSE |
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301 | if (verboseLevel>0) { |
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302 | G4cout << "G4VDecayChannel::FillDaughters "; |
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303 | G4cout << "[ " << parent->GetParticleName() << " ]"; |
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304 | G4cout << index << "-th daughter is not defined yet" << G4endl; |
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305 | } |
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306 | #endif |
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307 | daughters[index] = 0; |
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308 | G4Exception("G4VDecayChannel::FillDaughters", |
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309 | "can not fill daughters", FatalException, |
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310 | "name of a daughter is not defined yet"); |
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311 | } |
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312 | //search daughter particles in the particle table |
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313 | daughters[index] = particletable->FindParticle(*daughters_name[index]); |
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314 | if (daughters[index] == 0) { |
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315 | // can not find the daughter particle |
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316 | #ifdef G4VERBOSE |
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317 | if (verboseLevel>0) { |
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318 | G4cout << "G4VDecayChannel::FillDaughters "; |
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319 | G4cout << "[ " << parent->GetParticleName() << " ]"; |
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320 | G4cout << index << ":" << *daughters_name[index]; |
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321 | G4cout << " is not defined !!" << G4endl; |
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322 | G4cout << " The BR of this decay mode is set to zero " << G4endl; |
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323 | } |
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324 | #endif |
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325 | SetBR(0.0); |
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326 | return; |
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327 | } |
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328 | #ifdef G4VERBOSE |
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329 | if (verboseLevel>1) { |
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330 | G4cout << index << ":" << *daughters_name[index]; |
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331 | G4cout << ":" << daughters[index] << G4endl; |
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332 | } |
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333 | #endif |
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334 | daughters_mass[index] = daughters[index]->GetPDGMass(); |
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335 | sumofdaughtermass += daughters[index]->GetPDGMass(); |
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336 | } // end loop over all daughters |
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337 | |
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338 | // check sum of daghter mass |
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339 | G4double widthMass = parent->GetPDGWidth(); |
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340 | if ( (parent->GetParticleType() != "nucleus") && |
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341 | (sumofdaughtermass > parentmass + 5*widthMass) ){ |
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342 | // !!! illegal mass !!! |
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343 | #ifdef G4VERBOSE |
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344 | if (GetVerboseLevel()>0) { |
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345 | G4cout << "G4VDecayChannel::FillDaughters "; |
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346 | G4cout << "[ " << parent->GetParticleName() << " ]"; |
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347 | G4cout << " Energy/Momentum conserevation breaks " <<G4endl; |
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348 | if (GetVerboseLevel()>1) { |
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349 | G4cout << " parent:" << *parent_name; |
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350 | G4cout << " mass:" << parentmass/GeV << "[GeV/c/c]" <<G4endl; |
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351 | for (index=0; index < numberOfDaughters; index++){ |
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352 | G4cout << " daughter " << index << ":" << *daughters_name[index]; |
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353 | G4cout << " mass:" << daughters[index]->GetPDGMass()/GeV; |
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354 | G4cout << "[GeV/c/c]" <<G4endl; |
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355 | } |
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356 | } |
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357 | } |
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358 | #endif |
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359 | } |
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360 | } |
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361 | |
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362 | |
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363 | void G4VDecayChannel::FillParent() |
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364 | { |
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365 | if (parent_name == 0) { |
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366 | // parent name is not defined |
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367 | #ifdef G4VERBOSE |
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368 | if (verboseLevel>0) { |
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369 | G4cout << "G4VDecayChannel::FillParent "; |
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370 | G4cout << ": parent name is not defined !!" << G4endl; |
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371 | } |
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372 | #endif |
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373 | parent = 0; |
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374 | G4Exception("G4VDecayChannel::FillParent()", |
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375 | "can not fill parent", FatalException, |
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376 | "parent name is not defined yet"); |
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377 | } |
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378 | // search parent particle in the particle table |
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379 | parent = particletable->FindParticle(*parent_name); |
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380 | if (parent == 0) { |
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381 | // parent particle does not exist |
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382 | #ifdef G4VERBOSE |
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383 | if (verboseLevel>0) { |
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384 | G4cout << "G4VDecayChannel::FillParent "; |
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385 | G4cout << *parent_name << " does not exist !!" << G4endl; |
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386 | } |
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387 | #endif |
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388 | G4Exception("G4VDecayChannel::FillParent()", |
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389 | "can not fill parent", FatalException, |
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390 | "parent does not exist"); |
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391 | } |
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392 | parent_mass = parent->GetPDGMass(); |
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393 | } |
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394 | |
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395 | void G4VDecayChannel::SetParent(const G4ParticleDefinition * parent_type) |
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396 | { |
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397 | if (parent_type != 0) SetParent(parent_type->GetParticleName()); |
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398 | } |
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399 | |
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400 | G4int G4VDecayChannel::GetAngularMomentum() |
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401 | { |
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402 | // determine angular momentum |
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403 | |
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404 | // fill pointers to daughter particles if not yet set |
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405 | if (daughters == 0) FillDaughters(); |
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406 | |
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407 | const G4int PiSpin = parent->GetPDGiSpin(); |
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408 | const G4int PParity = parent->GetPDGiParity(); |
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409 | if (2==numberOfDaughters) { // up to now we can only handle two particle decays |
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410 | const G4int D1iSpin = daughters[0]->GetPDGiSpin(); |
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411 | const G4int D1Parity = daughters[0]->GetPDGiParity(); |
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412 | const G4int D2iSpin = daughters[1]->GetPDGiSpin(); |
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413 | const G4int D2Parity = daughters[1]->GetPDGiParity(); |
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414 | const G4int MiniSpin = std::abs (D1iSpin - D2iSpin); |
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415 | const G4int MaxiSpin = D1iSpin + D2iSpin; |
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416 | const G4int lMax = (PiSpin+D1iSpin+D2iSpin)/2; // l is allways int |
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417 | G4int lMin; |
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418 | #ifdef G4VERBOSE |
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419 | if (verboseLevel>1) { |
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420 | G4cout << "iSpin: " << PiSpin << " -> " << D1iSpin << " + " << D2iSpin << G4endl; |
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421 | G4cout << "2*jmin, 2*jmax, lmax " << MiniSpin << " " << MaxiSpin << " " << lMax << G4endl; |
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422 | } |
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423 | #endif |
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424 | for (G4int j=MiniSpin; j<=MaxiSpin; j+=2){ // loop over all possible spin couplings |
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425 | lMin = std::abs(PiSpin-j)/2; |
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426 | #ifdef G4VERBOSE |
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427 | if (verboseLevel>1) |
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428 | G4cout << "-> checking 2*j=" << j << G4endl; |
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429 | #endif |
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430 | for (G4int l=lMin; l<=lMax; l++) { |
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431 | #ifdef G4VERBOSE |
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432 | if (verboseLevel>1) |
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433 | G4cout << " checking l=" << l << G4endl; |
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434 | #endif |
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435 | if (l%2==0) { |
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436 | if (PParity == D1Parity*D2Parity) { // check parity for this l |
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437 | return l; |
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438 | } |
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439 | } else { |
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440 | if (PParity == -1*D1Parity*D2Parity) { // check parity for this l |
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441 | return l; |
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442 | } |
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443 | } |
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444 | } |
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445 | } |
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446 | } else { |
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447 | G4Exception("G4VDecayChannel::GetAngularMomentum", |
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448 | "can not calculate", JustWarning, |
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449 | "Sorry, can't handle 3 particle decays (up to now)"); |
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450 | return 0; |
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451 | } |
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452 | G4Exception ("G4VDecayChannel::GetAngularMomentum", |
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453 | "can not calculate", JustWarning, |
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454 | "Can't find angular momentum for this decay!"); |
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455 | return 0; |
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456 | } |
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457 | |
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458 | void G4VDecayChannel::DumpInfo() |
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459 | { |
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460 | G4cout << " BR: " << rbranch << " [" << kinematics_name << "]"; |
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461 | G4cout << " : " ; |
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462 | for (G4int index=0; index < numberOfDaughters; index++) |
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463 | { |
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464 | if(daughters_name[index] != 0) { |
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465 | G4cout << " " << *(daughters_name[index]); |
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466 | } else { |
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467 | G4cout << " not defined "; |
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468 | } |
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469 | } |
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470 | G4cout << G4endl; |
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471 | } |
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472 | |
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473 | const G4String& G4VDecayChannel::GetNoName() const |
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474 | { |
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475 | return noName; |
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476 | } |
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