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25 //
26 //
27 //
28 // ------------------------------------------------------------
29 // GEANT 4 class implementation
30 //
31 // ------- GVFlashShowerParameterisation -------
32 //
33 // Authors: Joanna Weng - 11.2005
34 // ------------------------------------------------------------
35
36 #include <cmath>
37
38 #include "GVFlashShowerParameterisation.hh"
39
40 #include "G4PhysicalConstants.hh"
41 #include "G4SystemOfUnits.hh"
42 #include "Randomize.hh"
43 #include "G4ios.hh"
44 #include "G4Material.hh"
45 #include "Gamma.hh" // @@@@
46 #include "G4MaterialTable.hh"
47
48 GVFlashShowerParameterisation::GVFlashShowerParameterisation()
49 : thePar(0), density(0.), A(0.), Z(0.), X0(0.), Ec(0.), Rm(0.), NSpot(0.)
50 {
51 fGamma = new MyGamma;
52 }
53
54 GVFlashShowerParameterisation::~GVFlashShowerParameterisation()
55 {
56 delete fGamma;
57 }
58
59 G4double GVFlashShowerParameterisation::GetEffZ(const G4Material* mat)
60 {
61 // Returns Z or effective Z=sum(pi*Zi) (if compound/mixture)
62 // of given material
63 //
64 G4double z = 0.;
65 G4int nofElements = (G4int)mat->GetNumberOfElements();
66 if (nofElements > 1) {
67 for (G4int i = 0; i < nofElements; ++i) {
68 G4double zOfElement = mat->GetElement(i)->GetZ();
69 G4double massFraction = mat->GetFractionVector()[i];
70 // cout << mat->GetElement(i)->GetName()
71 // <<" Z= "<<zOfElement << " , Fraction= "<<massFraction <<endl;
72 z += zOfElement * massFraction;
73 }
74 }
75 else {
76 z = mat->GetZ();
77 }
78 return z;
79 }
80
81 G4double GVFlashShowerParameterisation::GetEffA(const G4Material* mat)
82 {
83 // Returns A or effective A=sum(pi*Ai) (if compound/mixture)
84 // of given material
85 //
86 G4double a = 0.;
87 G4int nofElements = (G4int)mat->GetNumberOfElements();
88 if (nofElements > 1) {
89 for (G4int i = 0; i < nofElements; ++i) {
90 G4double aOfElement = mat->GetElement(i)->GetA() / (g / mole);
91 G4double massFraction = mat->GetFractionVector()[i];
92 a += aOfElement * massFraction;
93 }
94 }
95 else {
96 a = mat->GetA() / (g / mole);
97 }
98 return a;
99 }
100
101 void GVFlashShowerParameterisation::PrintMaterial(const G4Material* mat)
102 {
103 G4cout << "/********************************************/ " << G4endl;
104 G4cout << " - GVFlashShowerParameterisation::Material - " << G4endl;
105 G4cout << " Material : " << mat->GetName() << G4endl;
106 G4cout << " Z = " << Z << G4endl;
107 G4cout << " A = " << A << G4endl;
108 G4cout << " X0 = " << X0 / cm << " cm" << G4endl;
109 G4cout << " Rm = " << Rm / cm << " cm" << G4endl;
110 G4cout << " Ec = " << Ec / MeV << " MeV" << G4endl;
111 G4cout << "/********************************************/ " << G4endl;
112 }
113
114 G4double GVFlashShowerParameterisation::GeneratePhi()
115 {
116 G4double Phi = twopi*G4UniformRand() ;
117 return Phi;
118 }
119
120 G4double GVFlashShowerParameterisation::gam(G4double x, G4double a) const
121 {
122 return fGamma->Gamma(a, x);
123 }
124