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25 // 25 //
26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class file 29 // GEANT4 Class file
30 // 30 //
31 // 31 //
32 // File name: G4WentzelVIRelXSection 32 // File name: G4WentzelVIRelXSection
33 // 33 //
34 // Author: V.Ivanchenko 34 // Author: V.Ivanchenko
35 // 35 //
36 // Creation date: 08.06.2012 from G4WentzelOKa 36 // Creation date: 08.06.2012 from G4WentzelOKandVIxSection
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 39 //
40 // 40 //
41 41
42 // ------------------------------------------- 42 // -------------------------------------------------------------------
43 // 43 //
44 44
45 //....oooOO0OOooo........oooOO0OOooo........oo 45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
46 //....oooOO0OOooo........oooOO0OOooo........oo 46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
47 47
48 #include "G4WentzelVIRelXSection.hh" 48 #include "G4WentzelVIRelXSection.hh"
49 49
50 //....oooOO0OOooo........oooOO0OOooo........oo 50 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
51 51
52 G4WentzelVIRelXSection::G4WentzelVIRelXSection << 52 G4WentzelVIRelXSection::G4WentzelVIRelXSection()
>> 53 {}
53 54
54 //....oooOO0OOooo........oooOO0OOooo........oo 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
55 56
56 G4WentzelVIRelXSection::~G4WentzelVIRelXSectio << 57 G4WentzelVIRelXSection::~G4WentzelVIRelXSection()
>> 58 {}
57 59
58 //....oooOO0OOooo........oooOO0OOooo........oo 60 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
59 61
60 G4double G4WentzelVIRelXSection::SetupKinemati 62 G4double G4WentzelVIRelXSection::SetupKinematic(G4double kinEnergy,
61 cons 63 const G4Material* mat)
62 { 64 {
63 if(kinEnergy != tkin || mat != currentMateri 65 if(kinEnergy != tkin || mat != currentMaterial) {
64 66
65 currentMaterial = mat; 67 currentMaterial = mat;
66 tkin = kinEnergy; 68 tkin = kinEnergy;
67 G4double momLab2 = tkin*(tkin + 2.0*mass) 69 G4double momLab2 = tkin*(tkin + 2.0*mass);
68 70
69 G4double etot = tkin + mass; 71 G4double etot = tkin + mass;
70 G4double ptot = std::sqrt(momLab2); 72 G4double ptot = std::sqrt(momLab2);
71 G4double m12 = mass*mass; 73 G4double m12 = mass*mass;
72 74
73 // relativistic reduced mass from publucat 75 // relativistic reduced mass from publucation
74 // A.P. Martynenko, R.N. Faustov, Teoret. 76 // A.P. Martynenko, R.N. Faustov, Teoret. mat. Fiz. 64 (1985) 179
75 77
76 //incident particle & target nucleus 78 //incident particle & target nucleus
77 G4double Ecm = std::sqrt(m12 + targetMass* 79 G4double Ecm = std::sqrt(m12 + targetMass*targetMass + 2.0*etot*targetMass);
78 G4double mu_rel = mass*targetMass/Ecm; 80 G4double mu_rel = mass*targetMass/Ecm;
79 G4double momCM = ptot*targetMass/Ecm; 81 G4double momCM = ptot*targetMass/Ecm;
80 // relative system 82 // relative system
81 mom2 = momCM*momCM; 83 mom2 = momCM*momCM;
82 invbeta2 = 1.0 + mu_rel*mu_rel/mom2; 84 invbeta2 = 1.0 + mu_rel*mu_rel/mom2;
83 85
84 factB = spin/invbeta2; 86 factB = spin/invbeta2;
85 factD = std::sqrt(mom2)/targetMass; 87 factD = std::sqrt(mom2)/targetMass;
86 cosTetMaxNuc = isCombined ? 88 cosTetMaxNuc = isCombined ?
87 std::max(cosThetaMax, 1.-factorA2*mat->G 89 std::max(cosThetaMax, 1.-factorA2*mat->GetIonisation()->GetInvA23()/mom2)
88 : cosThetaMax; 90 : cosThetaMax;
89 } 91 }
90 return cosTetMaxNuc; 92 return cosTetMaxNuc;
91 } 93 }
92 94
93 //....oooOO0OOooo........oooOO0OOooo........oo 95 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
94 96
95 97