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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" 29 #include "G4V3DNucleus.hh"
30 #include <utility> 30 #include <utility>
31 31
32 // Class G4GammaParticipants 32 // Class G4GammaParticipants
33 33
34 //#define debugGammaParticipants << 34 // J.P. Wellisch, April 2002
>> 35 // new participants class for gamma nuclear, with this design more can come with
>> 36 // cross-section based, and quasi-eiconal model based modelling
>> 37 //
>> 38 // 20110805 M. Kelsey -- Follow change to G4V3DNucleus::GetNucleons()
35 39
36 G4VSplitableHadron* G4GammaParticipants::Selec 40 G4VSplitableHadron* G4GammaParticipants::SelectInteractions(const G4ReactionProduct &thePrimary)
37 { 41 {
38 // Check reaction threshold - goes to Check 42 // Check reaction threshold - goes to CheckThreshold
>> 43 G4VSplitableHadron* aProjectile = new G4QGSMSplitableHadron(thePrimary, TRUE); // @@@ check the TRUE
39 44
40 theProjectileSplitable = new G4QGSMSplitable << 45 const std::vector<G4Nucleon>& theTargetNuc = theNucleus->GetNucleons();
41 theProjectileSplitable->SetStatus(1); <<
42 <<
43 G4LorentzVector aPrimaryMomentum(thePrimary. 46 G4LorentzVector aPrimaryMomentum(thePrimary.GetMomentum(), thePrimary.GetTotalEnergy());
44 G4LorentzVector aTargetNMomentum(0.,0.,0.,93 <<
45 if((!(aPrimaryMomentum.e()>-1)) && (!(aPrima 47 if((!(aPrimaryMomentum.e()>-1)) && (!(aPrimaryMomentum.e()<1)) )
46 { 48 {
47 throw G4HadronicException(__FILE__, __LINE 49 throw G4HadronicException(__FILE__, __LINE__,
48 "G4GammaParticipants::SelectInteractio 50 "G4GammaParticipants::SelectInteractions: primary nan energy.");
49 } 51 }
50 G4double S = (aPrimaryMomentum + aTargetNMom << 52 G4double S = (aPrimaryMomentum + theTargetNuc[0].Get4Momentum()).mag2();
51 G4double ThresholdMass = thePrimary.GetMass( << 53 G4double ThresholdMass = thePrimary.GetMass() + theTargetNuc[0].GetDefinition()->GetPDGMass();
52 ModelMode = SOFT; 54 ModelMode = SOFT;
53 <<
54 #ifdef debugGammaParticipants <<
55 G4cout <<G4endl<< "Gamma Participants - Se <<
56 G4cout << "Energy and Nucleus <<
57 G4cout << "SqrtS ThresholdMass ModelMode " <<
58 G4cout << "ThresholdParameter <<
59 #endif <<
60 <<
61 <<
62 if (sqr(ThresholdMass + ThresholdParameter) 55 if (sqr(ThresholdMass + ThresholdParameter) > S)
63 { 56 {
64 ModelMode = DIFFRACTIVE; 57 ModelMode = DIFFRACTIVE;
>> 58 //throw G4HadronicException(__FILE__, __LINE__, "Initial energy is too low. The 4-vectors of the input are inconsistant with the particle masses.");
65 } 59 }
66 << 60 if (sqr(ThresholdMass + QGSMThreshold) > S) // thus only diffractive in cascade!
67 if (sqr(ThresholdMass + QGSMThreshold) > S) <<
68 { 61 {
69 ModelMode = DIFFRACTIVE; 62 ModelMode = DIFFRACTIVE;
70 } 63 }
71 64
72 #ifdef debugGammaParticipants << 65 // first find the collisions HPW
73 G4cout << "Interaction type (ModelMode) 0 <<
74 #endif <<
75 <<
76 std::for_each(theInteractions.begin(), theIn 66 std::for_each(theInteractions.begin(), theInteractions.end(), DeleteInteractionContent());
77 theInteractions.clear(); 67 theInteractions.clear();
>> 68 G4int totalCuts = 0;
78 69
79 // #ifdef debug_G4GammaParticipants << 70 #ifdef debug_G4GammaParticipants
80 // G4double eK = thePrimary.GetKineticEnerg << 71 G4double eK = thePrimary.GetKineticEnergy()/GeV;
81 // G4int nucleonCount = theNucleus->GetMass << 72 G4int nucleonCount = theTargetNuc.size(); // debug
82 // #endif << 73 #endif
83 <<
84 G4int theCurrent = G4int(theNucleus->GetMass <<
85 G4int NucleonNo=0; <<
86 <<
87 theNucleus->StartLoop(); <<
88 G4Nucleon * pNucleon =0; <<
89 <<
90 while( (pNucleon = theNucleus->GetNext <<
91 <<
92 if ( pNucleon ) { <<
93 <<
94 G4QGSMSplitableHadron* aTarget = new G4QGS <<
95 pNucleon->Hit(aTarget); <<
96 <<
97 if( (0.06 > G4UniformRand() &&(ModelMode== <<
98 { // Diffractive interaction <<
99 G4InteractionContent * aInteraction <<
100 theProjectileSplitable->SetStatus(1* <<
101 <<
102 aInteraction->SetTarget(aTarget); <<
103 aInteraction->SetTargetNucleon(pNucl <<
104 aTarget->SetCollisionCount(0); <<
105 aTarget->SetStatus(1); <<
106 <<
107 aInteraction->SetNumberOfDiffractive <<
108 aInteraction->SetNumberOfSoftCollisi <<
109 aInteraction->SetStatus(1); <<
110 74
111 theInteractions.push_back(aInteracti << 75 G4int theCurrent = static_cast<G4int> (theTargetNuc.size()*G4UniformRand());
112 } << 76 const G4Nucleon& pNucleon = theTargetNuc[theCurrent];
113 else << 77 G4QGSMSplitableHadron* aTarget = new G4QGSMSplitableHadron(pNucleon);
114 { << 78 theTargets.push_back(aTarget);
>> 79 const_cast<G4Nucleon&>(pNucleon).Hit(aTarget);
>> 80 if ( (0.06 > G4UniformRand() &&(ModelMode==SOFT)) || (ModelMode==DIFFRACTIVE ) )
>> 81 {
>> 82 // diffractive interaction occurs
>> 83 if(IsSingleDiffractive())
>> 84 {
>> 85 theSingleDiffExcitation.ExciteParticipants(aProjectile, aTarget);
>> 86 }
>> 87 else
>> 88 {
>> 89 theDiffExcitaton.ExciteParticipants(aProjectile, aTarget);
>> 90 }
>> 91 G4InteractionContent * aInteraction = new G4InteractionContent(aProjectile);
>> 92 aInteraction->SetTarget(aTarget);
>> 93 theInteractions.push_back(aInteraction);
>> 94 aInteraction->SetNumberOfDiffractiveCollisions(1);
>> 95 totalCuts += 1;
>> 96 }
>> 97 else
>> 98 {
115 // nondiffractive soft interaction occurs 99 // nondiffractive soft interaction occurs
116 aTarget->IncrementCollisionCount(1); 100 aTarget->IncrementCollisionCount(1);
117 aTarget->SetStatus(0); << 101 aProjectile->IncrementCollisionCount(1);
118 theTargets.push_back(aTarget); << 102 G4InteractionContent * aInteraction = new G4InteractionContent(aProjectile);
119 <<
120 theProjectileSplitable->IncrementCollision <<
121 theProjectileSplitable->SetStatus(0* <<
122 <<
123 G4InteractionContent * aInteraction = <<
124 new <<
125 aInteraction->SetTarget(aTarget); 103 aInteraction->SetTarget(aTarget);
126 aInteraction->SetTargetNucleon(pNucl <<
127 aInteraction->SetNumberOfSoftCollisions(1) 104 aInteraction->SetNumberOfSoftCollisions(1);
128 aInteraction->SetStatus(0); <<
129 theInteractions.push_back(aInteraction); 105 theInteractions.push_back(aInteraction);
130 } << 106 totalCuts += 1;
131 } << 107 }
132 return theProjectileSplitable; << 108 return aProjectile;
133 } 109 }
134 110