[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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| 26 | // |
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| 27 | // $Id: G4FTFParticipants.cc,v 1.7 2007/04/24 10:33:00 gunter Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-01-patch-02 $ |
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| 29 | // |
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| 30 | // ------------------------------------------------------------ |
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| 31 | // GEANT 4 class implementation file |
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| 32 | // |
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| 33 | // ---------------- G4FTFParticipants---------------- |
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| 34 | // by Gunter Folger, June 1998. |
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| 35 | // class finding colliding particles in FTFPartonStringModel |
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| 36 | // Changed in a part by V. Uzhinsky in oder to put in correcpondence |
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| 37 | // with original FRITIOF mode. November - December 2006. |
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| 38 | // ------------------------------------------------------------ |
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| 39 | |
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| 40 | #include "G4FTFParticipants.hh" |
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| 41 | #include "G4DiffractiveSplitableHadron.hh" |
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| 42 | #include "G4VSplitableHadron.hh" |
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| 43 | //#include "G4PomeronCrossSection.hh" // Uzhi |
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| 44 | #include "G4FTFCrossSection.hh" // Uzhi |
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| 45 | #include "Randomize.hh" |
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| 46 | #include <utility> |
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| 47 | |
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| 48 | |
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| 49 | // Class G4FTFParticipants |
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| 50 | |
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| 51 | |
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| 52 | |
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| 53 | G4FTFParticipants::G4FTFParticipants() |
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| 54 | { |
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| 55 | } |
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| 56 | |
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| 57 | G4FTFParticipants::G4FTFParticipants(const G4FTFParticipants &): G4VParticipants() |
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| 58 | { |
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| 59 | } |
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| 60 | |
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| 61 | |
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| 62 | G4FTFParticipants::~G4FTFParticipants() |
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| 63 | { |
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| 64 | } |
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| 65 | |
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| 66 | |
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| 67 | //const G4FTFParticipants & G4FTFParticipants::operator=(const G4FTFParticipants &right) |
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| 68 | //{} |
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| 69 | |
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| 70 | |
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| 71 | //int G4FTFParticipants::operator==(const G4FTFParticipants &right) const |
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| 72 | //{} |
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| 73 | |
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| 74 | //int G4FTFParticipants::operator!=(const G4FTFParticipants &right) const |
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| 75 | //{} |
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| 76 | |
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| 77 | void G4FTFParticipants::BuildInteractions(const G4ReactionProduct &thePrimary) |
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| 78 | { |
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| 79 | |
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| 80 | StartLoop(); // reset Loop over Interactions |
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| 81 | |
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| 82 | for(unsigned int i=0; i<theInteractions.size(); i++) delete theInteractions[i]; |
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| 83 | theInteractions.clear(); |
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| 84 | |
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| 85 | // --- cms energy |
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| 86 | |
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| 87 | G4double s = sqr( thePrimary.GetMass() ) + |
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| 88 | sqr( G4Proton::Proton()->GetPDGMass() ) + |
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| 89 | 2*thePrimary.GetTotalEnergy()*G4Proton::Proton()->GetPDGMass(); |
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| 90 | |
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| 91 | // G4cout << " primary Total E (GeV): " << thePrimary.GetTotalEnergy()/GeV << G4endl; |
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| 92 | // G4cout << " primary Mass (GeV): " << thePrimary.GetMass() /GeV << G4endl; |
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| 93 | // G4cout << "cms std::sqrt(s) (GeV) = " << std::sqrt(s) / GeV << G4endl; |
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| 94 | |
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| 95 | // G4PomeronCrossSection theCrossSection(thePrimary.GetDefinition()); // Uzhi |
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| 96 | G4FTFCrossSection theCrossSection(thePrimary.GetDefinition(),s); // Uzhi |
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| 97 | |
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| 98 | |
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| 99 | G4double deltaxy=2 * fermi; |
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| 100 | |
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| 101 | G4VSplitableHadron * primarySplitable=new G4DiffractiveSplitableHadron(thePrimary); |
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| 102 | |
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| 103 | G4double xyradius; |
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| 104 | xyradius =theNucleus->GetOuterRadius() + deltaxy; |
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| 105 | |
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| 106 | G4bool nucleusNeedsShift = true; |
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| 107 | |
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| 108 | while ( theInteractions.size() == 0 ) |
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| 109 | { |
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| 110 | std::pair<G4double, G4double> theImpactParameter; |
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| 111 | theImpactParameter = theNucleus->ChooseImpactXandY(xyradius); |
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| 112 | G4double impactX = theImpactParameter.first; |
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| 113 | G4double impactY = theImpactParameter.second; |
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| 114 | |
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| 115 | theNucleus->StartLoop(); |
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| 116 | G4Nucleon * nucleon; |
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| 117 | while ( (nucleon=theNucleus->GetNextNucleon()) ) |
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| 118 | { |
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| 119 | G4double impact2= sqr(impactX - nucleon->GetPosition().x()) + |
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| 120 | sqr(impactY - nucleon->GetPosition().y()); |
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| 121 | // if ( theCrossSection.GetInelasticProbability(s,impact2) // Uzhi |
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| 122 | if ( theCrossSection.GetInelasticProbability( impact2/fermi/fermi) // Uzhi |
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| 123 | > G4UniformRand() ) |
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| 124 | { |
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| 125 | if ( nucleusNeedsShift ) |
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| 126 | { // on the first hit, shift nucleus |
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| 127 | nucleusNeedsShift = false; |
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| 128 | theNucleus->DoTranslation(G4ThreeVector(-1*impactX,-1*impactY,0.)); |
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| 129 | impactX=0; |
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| 130 | impactY=0; |
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| 131 | } |
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| 132 | G4VSplitableHadron * targetSplitable; |
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| 133 | if ( (targetSplitable=nucleon->GetSplitableHadron()) == NULL ) |
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| 134 | { |
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| 135 | targetSplitable= new G4DiffractiveSplitableHadron(*nucleon); |
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| 136 | nucleon->Hit(targetSplitable); |
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| 137 | } |
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| 138 | G4InteractionContent * aInteraction = new G4InteractionContent(primarySplitable); |
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| 139 | aInteraction->SetTarget(targetSplitable); |
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| 140 | theInteractions.push_back(aInteraction); |
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| 141 | } |
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| 142 | } |
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| 143 | |
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| 144 | // G4cout << "Number of Hit nucleons " << theInteractions.size() // entries() |
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| 145 | // << "\t" << impactX/fermi << "\t"<<impactY/fermi |
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| 146 | // << "\t" << std::sqrt(sqr(impactX)+sqr(impactY))/fermi <<G4endl; |
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| 147 | |
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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 | |
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| 153 | // Implementation (private) methods |
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| 154 | |
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| 155 | |
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| 156 | |
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| 157 | |
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| 158 | |
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