| Geant4 Cross Reference |
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25 //
26 // History:
27 // -----------
28 // 10 Nov 2021 S. Guatelli & S. Bakr, Wollongong University - 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
34 // - S. Bakr et al. (2021) NIM B, 507:11-19.
35 // - S. Bakr et al (2018), NIMB B, 436: 285-291.
36 // ---------------------------------------------------------------------------------------
37
38 #include <fstream>
39 #include <iomanip>
40
41 #include "G4ANSTOecpssrKxsModel.hh"
42
43 #include "globals.hh"
44 #include "G4SystemOfUnits.hh"
45 #include "G4ios.hh"
46
47 #include "G4EMDataSet.hh"
48 #include "G4LogLogInterpolation.hh"
49 #include "G4Proton.hh"
50 #include "G4Alpha.hh"
51
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53
54 G4ANSTOecpssrKxsModel::G4ANSTOecpssrKxsModel()
55 {
56
57 G4cout << "Using ANSTO K Cross Sections! "<< G4endl;
58
59 interpolation = new G4LogLogInterpolation();
60 for (G4int i=6; i<93; i++)
61 {
62 protonDataSetMap[i] = new G4EMDataSet(i,interpolation);
63 protonDataSetMap[i]->LoadData("pixe_ANSTO/proton/k-");
64 }
65
66 for (G4int i=6; i<93; i++)
67 {
68 alphaDataSetMap[i] = new G4EMDataSet(i,interpolation);
69 alphaDataSetMap[i]->LoadData("pixe_ANSTO/alpha/k-");
70 }
71
72 }
73
74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
75
76 G4ANSTOecpssrKxsModel::~G4ANSTOecpssrKxsModel()
77 {
78 protonDataSetMap.clear();
79 alphaDataSetMap.clear();
80 delete interpolation;
81 }
82
83 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
84
85 G4double G4ANSTOecpssrKxsModel::CalculateCrossSection(G4int zTarget,G4double massIncident, G4double energyIncident)
86 {
87 G4Proton* aProton = G4Proton::Proton();
88 G4Alpha* aAlpha = G4Alpha::Alpha();
89 G4double sigma = 0;
90
91 if (massIncident == aProton->GetPDGMass())
92 {
93 if (energyIncident > 0.2*MeV && energyIncident < 5.*MeV && zTarget < 93 && zTarget > 5) {
94
95 sigma = protonDataSetMap[zTarget]->FindValue(energyIncident/MeV);
96 if (sigma !=0 && energyIncident > protonDataSetMap[zTarget]->GetEnergies(0).back()*MeV) return 0.;
97 }
98 }
99
100 else if (massIncident == aAlpha->GetPDGMass())
101 {
102 if (energyIncident > 0.2*MeV && energyIncident < 40.*MeV && zTarget < 93 && zTarget > 5) {
103
104 sigma = alphaDataSetMap[zTarget]->FindValue(energyIncident/MeV);
105 if (sigma !=0 && energyIncident > alphaDataSetMap[zTarget]->GetEnergies(0).back()*MeV) return 0.;
106 }
107 }
108
109 else
110 {
111 sigma = 0.;
112 }
113
114 // sigma is in internal units: it has been converted from
115 // the input file in barns bt the EmDataset
116 return sigma;
117 }
118