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25 // 25 //
26 #include "globals.hh" 26 #include "globals.hh"
27 #include "G4GammaParticipants.hh" 27 #include "G4GammaParticipants.hh"
28 #include "G4LorentzVector.hh" 28 #include "G4LorentzVector.hh"
29 #include "G4V3DNucleus.hh" <<
30 #include <utility> 29 #include <utility>
31 30
32 // Class G4GammaParticipants 31 // Class G4GammaParticipants
33 32
34 //#define debugGammaParticipants << 33 // J.P. Wellisch, April 2002
>> 34 // new participants class for gamma nuclear, with this design more can come with
>> 35 // cross-section based, and quasi-eiconal model based modelling
35 36
36 G4VSplitableHadron* G4GammaParticipants::Selec 37 G4VSplitableHadron* G4GammaParticipants::SelectInteractions(const G4ReactionProduct &thePrimary)
37 { 38 {
38 // Check reaction threshold - goes to Check << 39 // Check reaction threshold - goes to CheckThreshold
>> 40 G4VSplitableHadron* aProjectile = new G4QGSMSplitableHadron(thePrimary, TRUE); // @@@ check the TRUE
39 41
40 theProjectileSplitable = new G4QGSMSplitable << 42 const std::vector<G4Nucleon *> & theTargetNuc = theNucleus->GetNucleons();
41 theProjectileSplitable->SetStatus(1); << 43 G4LorentzVector aPrimaryMomentum(thePrimary.GetMomentum(), thePrimary.GetTotalEnergy());
42 << 44 if((!(aPrimaryMomentum.e()>-1)) && (!(aPrimaryMomentum.e()<1)) )
43 G4LorentzVector aPrimaryMomentum(thePrimary. << 45 {
44 G4LorentzVector aTargetNMomentum(0.,0.,0.,93 << 46 throw G4HadronicException(__FILE__, __LINE__,
45 if((!(aPrimaryMomentum.e()>-1)) && (!(aPrima << 47 "G4GammaParticipants::SelectInteractions: primary nan energy.");
46 { << 48 }
47 throw G4HadronicException(__FILE__, __LINE << 49 G4double s = (aPrimaryMomentum + theTargetNuc[0]->Get4Momentum()).mag2();
48 "G4GammaParticipants::SelectInteractio << 50 G4double ThresholdMass = thePrimary.GetMass() + theTargetNuc[0]->GetDefinition()->GetPDGMass();
49 } << 51 ModelMode = SOFT;
50 G4double S = (aPrimaryMomentum + aTargetNMom << 52 if (sqr(ThresholdMass + ThresholdParameter) > s)
51 G4double ThresholdMass = thePrimary.GetMass( << 53 {
52 ModelMode = SOFT; << 54 ModelMode = DIFFRACTIVE;
53 << 55 //throw G4HadronicException(__FILE__, __LINE__, "Initial energy is too low. The 4-vectors of the input are inconsistant with the particle masses.");
54 #ifdef debugGammaParticipants << 56 }
55 G4cout <<G4endl<< "Gamma Participants - Se << 57 if (sqr(ThresholdMass + QGSMThreshold) > s) // thus only diffractive in cascade!
56 G4cout << "Energy and Nucleus << 58 {
57 G4cout << "SqrtS ThresholdMass ModelMode " << 59 ModelMode = DIFFRACTIVE;
58 G4cout << "ThresholdParameter << 60 }
59 #endif << 61
60 << 62 // first find the collisions HPW
61 << 63 std::for_each(theInteractions.begin(), theInteractions.end(), DeleteInteractionContent());
62 if (sqr(ThresholdMass + ThresholdParameter) << 64 theInteractions.clear();
63 { << 65 G4int totalCuts = 0;
64 ModelMode = DIFFRACTIVE; << 66
65 } << 67 #ifdef debug_G4GammaParticipants
66 << 68 G4double eK = thePrimary.GetKineticEnergy()/GeV;
67 if (sqr(ThresholdMass + QGSMThreshold) > S) << 69 G4int nucleonCount = theTargetNuc.size(); // debug
68 { << 70 #endif
69 ModelMode = DIFFRACTIVE; << 71
70 } << 72 G4int theCurrent = static_cast<G4int> (theTargetNuc.size()*G4UniformRand());
71 << 73 G4Nucleon * pNucleon = theTargetNuc[theCurrent];
72 #ifdef debugGammaParticipants << 74 G4QGSMSplitableHadron* aTarget = new G4QGSMSplitableHadron(*pNucleon);
73 G4cout << "Interaction type (ModelMode) 0 << 75 theTargets.push_back(aTarget);
74 #endif << 76 pNucleon->Hit(aTarget);
75 << 77 if ( (0.06 > G4UniformRand() &&(ModelMode==SOFT)) || (ModelMode==DIFFRACTIVE ) )
76 std::for_each(theInteractions.begin(), theIn << 78 {
77 theInteractions.clear(); << 79 // diffractive interaction occurs
78 << 80 if(IsSingleDiffractive())
79 // #ifdef debug_G4GammaParticipants << 81 {
80 // G4double eK = thePrimary.GetKineticEnerg << 82 theSingleDiffExcitation.ExciteParticipants(aProjectile, aTarget);
81 // G4int nucleonCount = theNucleus->GetMass << 83 }
82 // #endif << 84 else
83 << 85 {
84 G4int theCurrent = G4int(theNucleus->GetMass << 86 theDiffExcitaton.ExciteParticipants(aProjectile, aTarget);
85 G4int NucleonNo=0; << 87 }
86 << 88 G4InteractionContent * aInteraction = new G4InteractionContent(aProjectile);
87 theNucleus->StartLoop(); << 89 aInteraction->SetTarget(aTarget);
88 G4Nucleon * pNucleon =0; << 90 theInteractions.push_back(aInteraction);
89 << 91 aInteraction->SetNumberOfDiffractiveCollisions(1);
90 while( (pNucleon = theNucleus->GetNext << 92 totalCuts += 1;
91 << 93 }
92 if ( pNucleon ) { << 94 else
93 << 95 {
94 G4QGSMSplitableHadron* aTarget = new G4QGS << 96 // nondiffractive soft interaction occurs
95 pNucleon->Hit(aTarget); << 97 aTarget->IncrementCollisionCount(1);
96 << 98 aProjectile->IncrementCollisionCount(1);
97 if( (0.06 > G4UniformRand() &&(ModelMode== << 99 G4InteractionContent * aInteraction = new G4InteractionContent(aProjectile);
98 { // Diffractive interaction << 100 aInteraction->SetTarget(aTarget);
99 G4InteractionContent * aInteraction << 101 aInteraction->SetNumberOfSoftCollisions(1);
100 theProjectileSplitable->SetStatus(1* << 102 theInteractions.push_back(aInteraction);
101 << 103 totalCuts += 1;
102 aInteraction->SetTarget(aTarget); << 104 }
103 aInteraction->SetTargetNucleon(pNucl << 105 return aProjectile;
104 aTarget->SetCollisionCount(0); <<
105 aTarget->SetStatus(1); <<
106 <<
107 aInteraction->SetNumberOfDiffractive <<
108 aInteraction->SetNumberOfSoftCollisi <<
109 aInteraction->SetStatus(1); <<
110 <<
111 theInteractions.push_back(aInteracti <<
112 } <<
113 else <<
114 { <<
115 // nondiffractive soft interaction occurs <<
116 aTarget->IncrementCollisionCount(1); <<
117 aTarget->SetStatus(0); <<
118 theTargets.push_back(aTarget); <<
119 <<
120 theProjectileSplitable->IncrementCollision <<
121 theProjectileSplitable->SetStatus(0* <<
122 <<
123 G4InteractionContent * aInteraction = <<
124 new <<
125 aInteraction->SetTarget(aTarget); <<
126 aInteraction->SetTargetNucleon(pNucl <<
127 aInteraction->SetNumberOfSoftCollisions(1) <<
128 aInteraction->SetStatus(0); <<
129 theInteractions.push_back(aInteraction); <<
130 } <<
131 } <<
132 return theProjectileSplitable; <<
133 } 106 }
134 107