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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4RDeIonisationCrossSectionHandler
33 //
34 // Author: V.Ivanchenko (Vladimir.Ivanchenko@cern.ch)
35 //
36 // Creation date: 25 Sept 2001
37 //
38 // Modifications:
39 // 10 Oct 2001 M.G. Pia Revision to improve code quality and consistency with design
40 // 19 Jul 2002 VI Create composite data set for material
41 // 21 Jan 2003 V.Ivanchenko Cut per region
42 //
43 // -------------------------------------------------------------------
44
45 #include "G4RDeIonisationCrossSectionHandler.hh"
46 #include "G4PhysicalConstants.hh"
47 #include "G4SystemOfUnits.hh"
48 #include "G4RDVEnergySpectrum.hh"
49 #include "G4DataVector.hh"
50 #include "G4RDCompositeEMDataSet.hh"
51 #include "G4RDVDataSetAlgorithm.hh"
52 #include "G4RDLinLogLogInterpolation.hh"
53 #include "G4RDSemiLogInterpolation.hh"
54 #include "G4RDVEMDataSet.hh"
55 #include "G4RDEMDataSet.hh"
56 #include "G4Material.hh"
57 #include "G4ProductionCutsTable.hh"
58
59
60 G4RDeIonisationCrossSectionHandler::G4RDeIonisationCrossSectionHandler(
61 const G4RDVEnergySpectrum* spec, G4RDVDataSetAlgorithm* alg,
62 G4double emin, G4double emax, G4int nbin)
63 : G4RDVCrossSectionHandler(),
64 theParam(spec)
65 {
66 G4RDVCrossSectionHandler::Initialise(alg, emin, emax, nbin);
67 interp = new G4RDLinLogLogInterpolation();
68 }
69
70
71 G4RDeIonisationCrossSectionHandler::~G4RDeIonisationCrossSectionHandler()
72 {
73 delete interp;
74 }
75
76
77 std::vector<G4RDVEMDataSet*>* G4RDeIonisationCrossSectionHandler::BuildCrossSectionsForMaterials(
78 const G4DataVector& energyVector,
79 const G4DataVector* energyCuts)
80 {
81 G4int verbose = 0;
82 std::vector<G4RDVEMDataSet*>* set = new std::vector<G4RDVEMDataSet*>;
83
84 G4DataVector* energies;
85 G4DataVector* cs;
86 G4int nOfBins = energyVector.size();
87
88 const G4ProductionCutsTable* theCoupleTable=
89 G4ProductionCutsTable::GetProductionCutsTable();
90 size_t numOfCouples = theCoupleTable->GetTableSize();
91
92 for (size_t m=0; m<numOfCouples; m++) {
93
94 const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(m);
95 const G4Material* material= couple->GetMaterial();
96 const G4ElementVector* elementVector = material->GetElementVector();
97 const G4double* nAtomsPerVolume = material->GetAtomicNumDensityVector();
98 G4int nElements = material->GetNumberOfElements();
99
100 if(verbose > 0) {
101 G4cout << "eIonisation CS for " << m << "th material "
102 << material->GetName()
103 << " eEl= " << nElements << G4endl;
104 }
105
106 G4double tcut = (*energyCuts)[m];
107
108 G4RDVDataSetAlgorithm* algo = interp->Clone();
109 G4RDVEMDataSet* setForMat = new G4RDCompositeEMDataSet(algo,1.,1.);
110
111 for (G4int i=0; i<nElements; i++) {
112
113 G4int Z = (G4int) (*elementVector)[i]->GetZ();
114 G4int nShells = NumberOfComponents(Z);
115 energies = new G4DataVector;
116 cs = new G4DataVector;
117 G4double density = nAtomsPerVolume[i];
118
119 for (G4int bin=0; bin<nOfBins; bin++) {
120
121 G4double e = energyVector[bin];
122 energies->push_back(e);
123 G4double value = 0.0;
124
125 if(e > tcut) {
126 for (G4int n=0; n<nShells; n++) {
127 G4double cross = FindValue(Z, e, n);
128 G4double p = theParam->Probability(Z, tcut, e, e, n);
129 value += cross * p * density;
130
131 if(verbose>0 && m == 0 && e>=1. && e<=0.) {
132 G4cout << "G4eIonCrossSH: e(MeV)= " << e/MeV
133 << " n= " << n
134 << " cross= " << cross
135 << " p= " << p
136 << " value= " << value
137 << " tcut(MeV)= " << tcut/MeV
138 << " rho= " << density
139 << " Z= " << Z
140 << G4endl;
141 }
142
143 }
144 }
145 cs->push_back(value);
146 }
147 G4RDVDataSetAlgorithm* algo = interp->Clone();
148 G4RDVEMDataSet* elSet = new G4RDEMDataSet(i,energies,cs,algo,1.,1.);
149 setForMat->AddComponent(elSet);
150 }
151 set->push_back(setForMat);
152 }
153
154 return set;
155 }
156
157
158