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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4VhShellCrossSection
33 //
34 // Author: V.Ivanchenko (Vladimir.Ivanchenko@cern.ch)
35 //
36 // History:
37 // -----------
38 // 20 Oct 2001 V.Ivanchenko 1st implementation
39 // 24 Oct 2001 MGP Minor clean-up
40 // 29 Oct 2001 VI Add delta energy
41 //
42 // -------------------------------------------------------------------
43
44 #include "G4VhShellCrossSection.hh"
45 #include "Randomize.hh"
46
47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
48 G4VhShellCrossSection::G4VhShellCrossSection(const G4String& xname)
49 :name(xname)
50 {}
51
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
53 G4VhShellCrossSection::~G4VhShellCrossSection()
54 {}
55
56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
57
58 void G4VhShellCrossSection :: SetTotalCS(G4double)
59 {}
60
61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
62
63 G4int G4VhShellCrossSection::SelectRandomShell(G4int Z,
64 G4double incidentEnergy,
65 G4double mass,
66 G4double deltaEnergy,
67 const G4Material* mat)
68 // returns the shell ionized if the shell exists. If the shell is
69 // not counted, it returns -1
70 {
71 std::vector<G4double> p =
72 Probabilities(Z,incidentEnergy,mass,deltaEnergy,mat);
73 G4int shell = -1;
74 G4int nShells = (G4int)p.size();
75 G4double q = G4UniformRand();
76 for (G4int i=0; i<nShells; ++i) {
77
78 if (p[i] >= q) {
79 shell = i;
80 break;
81 }
82 q -= p[i];
83 }
84 return shell;
85 }
86