| Geant4 Cross Reference |
1 //
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18 // * This code implementation is the result of the scientific and *
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24 // ********************************************************************
25 //
26 // History:
27 // -----------
28 // 01 Oct 2011 A.M., S.I. - 1st implementation
29 //
30 // Class description
31 // ----------------
32 // Computation of K, L & M shell ECPSSR ionisation cross sections for protons and alphas
33 // Based on the work of A. Taborda et al.
34 // X-Ray Spectrom. 2011, 40, 127-134
35 // ---------------------------------------------------------------------------------------
36
37 #include <fstream>
38 #include <iomanip>
39
40 #include "G4ecpssrFormFactorKxsModel.hh"
41
42 #include "globals.hh"
43 #include "G4SystemOfUnits.hh"
44 #include "G4ios.hh"
45
46 #include "G4EMDataSet.hh"
47 #include "G4LogLogInterpolation.hh"
48 #include "G4Proton.hh"
49 #include "G4Alpha.hh"
50
51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
52
53 G4ecpssrFormFactorKxsModel::G4ecpssrFormFactorKxsModel()
54 {
55 interpolation = new G4LogLogInterpolation();
56
57 for (G4int i=3; i<93; i++)
58 {
59 protonDataSetMap[i] = new G4EMDataSet(i,interpolation);
60 protonDataSetMap[i]->LoadData("pixe/ecpssr/proton/k-i01m001c01-");
61 }
62
63 for (G4int i=3; i<93; i++)
64 {
65 alphaDataSetMap[i] = new G4EMDataSet(i,interpolation);
66 alphaDataSetMap[i]->LoadData("pixe/ecpssr/alpha/k-i02m004c02-");
67 }
68 }
69
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
71
72 G4ecpssrFormFactorKxsModel::~G4ecpssrFormFactorKxsModel()
73 {
74 protonDataSetMap.clear();
75 alphaDataSetMap.clear();
76 delete interpolation;
77 }
78
79 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
80
81 G4double G4ecpssrFormFactorKxsModel::CalculateCrossSection(G4int zTarget,G4double massIncident, G4double energyIncident)
82 {
83 G4Proton* aProton = G4Proton::Proton();
84 G4Alpha* aAlpha = G4Alpha::Alpha();
85 G4double sigma = 0;
86
87 if (energyIncident > 0.1*MeV && energyIncident < 100.*MeV && zTarget < 93 && zTarget > 2) {
88
89 if (massIncident == aProton->GetPDGMass())
90 {
91 sigma = protonDataSetMap[zTarget]->FindValue(energyIncident/MeV);
92 if (sigma !=0 && energyIncident > protonDataSetMap[zTarget]->GetEnergies(0).back()*MeV) return 0.;
93 }
94 else if (massIncident == aAlpha->GetPDGMass())
95 {
96 sigma = alphaDataSetMap[zTarget]->FindValue(energyIncident/MeV);
97 if (sigma !=0 && energyIncident > alphaDataSetMap[zTarget]->GetEnergies(0).back()*MeV) return 0.;
98 }
99 else
100 {
101 sigma = 0.;
102 }
103 }
104
105 // sigma is in internal units: it has been converted from
106 // the input file in barns bt the EmDataset
107 return sigma;
108 }
109