| Geant4 Cross Reference |
1 // 1
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25 //
26 //
27 // -------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4WentzelVIRelXSection
33 //
34 // Author: V.Ivanchenko
35 //
36 // Creation date: 08.06.2012 from G4WentzelOKa
37 //
38 // Modifications:
39 //
40 //
41
42 // -------------------------------------------
43 //
44
45 //....oooOO0OOooo........oooOO0OOooo........oo
46 //....oooOO0OOooo........oooOO0OOooo........oo
47
48 #include "G4WentzelVIRelXSection.hh"
49
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51
52 G4WentzelVIRelXSection::G4WentzelVIRelXSection
53
54 //....oooOO0OOooo........oooOO0OOooo........oo
55
56 G4WentzelVIRelXSection::~G4WentzelVIRelXSectio
57
58 //....oooOO0OOooo........oooOO0OOooo........oo
59
60 G4double G4WentzelVIRelXSection::SetupKinemati
61 cons
62 {
63 if(kinEnergy != tkin || mat != currentMateri
64
65 currentMaterial = mat;
66 tkin = kinEnergy;
67 G4double momLab2 = tkin*(tkin + 2.0*mass)
68
69 G4double etot = tkin + mass;
70 G4double ptot = std::sqrt(momLab2);
71 G4double m12 = mass*mass;
72
73 // relativistic reduced mass from publucat
74 // A.P. Martynenko, R.N. Faustov, Teoret.
75
76 //incident particle & target nucleus
77 G4double Ecm = std::sqrt(m12 + targetMass*
78 G4double mu_rel = mass*targetMass/Ecm;
79 G4double momCM = ptot*targetMass/Ecm;
80 // relative system
81 mom2 = momCM*momCM;
82 invbeta2 = 1.0 + mu_rel*mu_rel/mom2;
83
84 factB = spin/invbeta2;
85 factD = std::sqrt(mom2)/targetMass;
86 cosTetMaxNuc = isCombined ?
87 std::max(cosThetaMax, 1.-factorA2*mat->G
88 : cosThetaMax;
89 }
90 return cosTetMaxNuc;
91 }
92
93 //....oooOO0OOooo........oooOO0OOooo........oo
94
95