[819] | 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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[1315] | 26 | // $Id: G4VCrossSectionSource.cc,v 1.6 2010/03/12 15:45:18 gunter Exp $ // |
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[819] | 27 | // |
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| 28 | |
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| 29 | #include "globals.hh" |
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| 30 | #include "G4HadronicException.hh" |
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| 31 | #include "G4ios.hh" |
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| 32 | #include "G4VCrossSectionSource.hh" |
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| 33 | #include "G4ParticleDefinition.hh" |
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| 34 | #include "G4KineticTrack.hh" |
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| 35 | #include "G4CrossSectionVector.hh" |
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| 36 | #include "G4CrossSectionSourcePtr.hh" |
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| 37 | #include "G4Proton.hh" |
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| 38 | #include "G4Neutron.hh" |
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| 39 | |
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| 40 | G4VCrossSectionSource::G4VCrossSectionSource() |
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| 41 | { } |
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| 42 | |
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| 43 | |
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| 44 | G4VCrossSectionSource::~G4VCrossSectionSource() |
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| 45 | { } |
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| 46 | |
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| 47 | |
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[1228] | 48 | G4ParticleDefinition * G4VCrossSectionSource:: |
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[819] | 49 | FindKeyParticle(const G4KineticTrack& trk1,const G4KineticTrack& trk2) const |
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| 50 | { |
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[1228] | 51 | G4ParticleDefinition * result; |
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[819] | 52 | |
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| 53 | G4ParticleDefinition * p1 = trk1.GetDefinition(); |
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| 54 | G4ParticleDefinition * p2 = trk2.GetDefinition(); |
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| 55 | |
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| 56 | if( (p1==G4Proton::Proton() && p2==G4Proton::Proton() ) || |
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| 57 | (p1==G4Neutron::Neutron() && p2==G4Neutron::Neutron()) ) |
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| 58 | { |
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[1228] | 59 | result = G4Proton::Proton(); |
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[819] | 60 | } |
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| 61 | else if( (p1==G4Neutron::Neutron() && p2==G4Proton::Proton()) || |
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| 62 | (p2==G4Neutron::Neutron() && p1==G4Proton::Proton()) ) |
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| 63 | { |
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[1228] | 64 | result = G4Neutron::Neutron(); |
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[819] | 65 | } |
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| 66 | else |
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| 67 | { |
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| 68 | throw G4HadronicException(__FILE__, __LINE__, "G4VCrossSectionSource: unklnown particles in FindKeyParticle"); |
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| 69 | } |
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| 70 | return result; |
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| 71 | } |
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| 72 | |
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| 73 | G4bool G4VCrossSectionSource::operator==(const G4VCrossSectionSource &right) const |
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| 74 | { |
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| 75 | return (this == (G4VCrossSectionSource *) &right); |
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| 76 | } |
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| 77 | |
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| 78 | |
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| 79 | G4bool G4VCrossSectionSource::operator!=(const G4VCrossSectionSource &right) const |
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| 80 | { |
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| 81 | return (this != (G4VCrossSectionSource *) &right); |
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| 82 | } |
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| 83 | |
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| 84 | |
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| 85 | void G4VCrossSectionSource::Print() const |
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| 86 | { |
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| 87 | G4int nComponents = 0; |
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| 88 | const G4CrossSectionVector* components = GetComponents(); |
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| 89 | if (components) |
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| 90 | { |
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| 91 | nComponents = components->size(); |
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| 92 | } |
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| 93 | G4cout << "---- " << this->Name() << " ---- has " << nComponents << " components" <<G4endl; |
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| 94 | G4int i; |
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| 95 | for (i=0; i<nComponents; i++) |
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| 96 | { |
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| 97 | G4cout << "-" << this->Name() << " - Component " << i << ": " <<G4endl; |
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| 98 | |
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| 99 | G4CrossSectionSourcePtr componentPtr = (*components)[i]; |
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| 100 | G4VCrossSectionSource* component = componentPtr(); |
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| 101 | component->Print(); |
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| 102 | } |
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| 103 | } |
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| 104 | |
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| 105 | |
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| 106 | void G4VCrossSectionSource::PrintAll(const G4KineticTrack& trk1, const G4KineticTrack& trk2) const |
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| 107 | { |
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| 108 | G4double sqrtS = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag(); |
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| 109 | G4double sigma = CrossSection(trk1,trk2) / millibarn; |
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| 110 | G4cout << "---- " << Name() << ": " |
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| 111 | << "Ecm = " << sqrtS / GeV << " GeV - " |
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| 112 | << " Cross section = " << sigma << " mb " |
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| 113 | << G4endl; |
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| 114 | |
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| 115 | G4int nComponents = 0; |
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| 116 | const G4CrossSectionVector* components = GetComponents(); |
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| 117 | if (components != 0) |
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| 118 | { |
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| 119 | nComponents = components->size(); |
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| 120 | } |
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| 121 | G4int i; |
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| 122 | for (i=0; i<nComponents; i++) |
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| 123 | { |
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| 124 | G4cout << "* Component " << i << ": "; |
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| 125 | G4CrossSectionSourcePtr componentPtr = (*components)[i]; |
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| 126 | G4VCrossSectionSource* component = componentPtr(); |
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| 127 | component->PrintAll(trk1,trk2); |
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| 128 | } |
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| 129 | } |
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| 130 | |
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| 131 | |
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| 132 | G4bool G4VCrossSectionSource::InLimits(G4double e, G4double eLow, G4double eHigh) const |
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| 133 | { |
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| 134 | G4bool answer = false; |
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| 135 | if (e >= eLow && e <= eHigh) answer = true; |
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| 136 | return answer; |
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| 137 | } |
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| 138 | |
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| 139 | G4double G4VCrossSectionSource::LowLimit() const |
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| 140 | { |
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| 141 | return 0.; |
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| 142 | } |
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| 143 | |
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| 144 | |
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| 145 | G4double G4VCrossSectionSource::HighLimit() const |
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| 146 | { |
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| 147 | return DBL_MAX; |
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| 148 | } |
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| 149 | |
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| 150 | G4bool G4VCrossSectionSource::IsValid(G4double e) const |
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| 151 | { |
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| 152 | G4bool answer = false; |
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| 153 | if (e >= LowLimit() && e <= HighLimit()) answer = true; |
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| 154 | return answer; |
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| 155 | } |
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| 156 | |
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| 157 | const G4ParticleDefinition* G4VCrossSectionSource::FindLightParticle(const G4KineticTrack& trk1, |
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| 158 | const G4KineticTrack& trk2) const |
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| 159 | { |
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| 160 | G4double mass1 = trk1.GetDefinition()->GetPDGMass(); |
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| 161 | G4double mass2 = trk2.GetDefinition()->GetPDGMass(); |
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| 162 | if (mass1 < mass2) |
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| 163 | { |
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| 164 | return trk1.GetDefinition(); |
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| 165 | } |
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| 166 | else |
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| 167 | { |
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| 168 | return trk2.GetDefinition(); |
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| 169 | } |
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| 170 | } |
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| 171 | |
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| 172 | |
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| 173 | G4double G4VCrossSectionSource::FcrossX(G4double e, G4double e0, |
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| 174 | G4double sigma, G4double eParam, G4double power) const |
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| 175 | { |
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| 176 | G4double result = 0.; |
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| 177 | |
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| 178 | G4double denom = eParam*eParam + (e-e0)*(e-e0); |
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| 179 | if (denom > 0.) |
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| 180 | { |
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| 181 | G4double value = (2.* eParam * sigma * (e-e0) / denom) * std::pow(((e0 + eParam) / e), power); |
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| 182 | result = std::max(0., value); |
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| 183 | } |
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| 184 | return result; |
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| 185 | } |
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| 186 | |
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| 187 | G4double G4VCrossSectionSource::GetTransversePionMass() const |
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| 188 | { |
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| 189 | // Parameter from UrQMD |
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| 190 | const G4double transversePionMass = 0.3 * GeV; |
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| 191 | return transversePionMass; |
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| 192 | } |
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| 193 | |
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| 194 | |
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| 195 | G4double G4VCrossSectionSource::GetMinStringMass() const |
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| 196 | { |
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| 197 | // Parameter from UrQMD |
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| 198 | const G4double minStringMass = 0.52 * GeV; |
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| 199 | return minStringMass; |
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| 200 | } |
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| 201 | |
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| 202 | |
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| 203 | |
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