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25 // 25 //
>> 26 // $Id$
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class file 30 // GEANT4 Class file
30 // 31 //
31 // 32 //
32 // File name: G4WentzelVIRelXSection 33 // File name: G4WentzelVIRelXSection
33 // 34 //
34 // Author: V.Ivanchenko 35 // Author: V.Ivanchenko
35 // 36 //
36 // Creation date: 08.06.2012 from G4WentzelOKa 37 // Creation date: 08.06.2012 from G4WentzelOKandVIxSection
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 40 //
40 // 41 //
41 42
42 // ------------------------------------------- 43 // -------------------------------------------------------------------
43 // 44 //
44 45
45 //....oooOO0OOooo........oooOO0OOooo........oo 46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
46 //....oooOO0OOooo........oooOO0OOooo........oo 47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
47 48
48 #include "G4WentzelVIRelXSection.hh" 49 #include "G4WentzelVIRelXSection.hh"
49 50
50 //....oooOO0OOooo........oooOO0OOooo........oo 51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
51 52
52 G4WentzelVIRelXSection::G4WentzelVIRelXSection << 53 G4WentzelVIRelXSection::G4WentzelVIRelXSection()
>> 54 {}
53 55
54 //....oooOO0OOooo........oooOO0OOooo........oo 56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
55 57
56 G4WentzelVIRelXSection::~G4WentzelVIRelXSectio << 58 G4WentzelVIRelXSection::~G4WentzelVIRelXSection()
>> 59 {}
57 60
58 //....oooOO0OOooo........oooOO0OOooo........oo 61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
59 62
60 G4double G4WentzelVIRelXSection::SetupKinemati 63 G4double G4WentzelVIRelXSection::SetupKinematic(G4double kinEnergy,
61 cons 64 const G4Material* mat)
62 { 65 {
63 if(kinEnergy != tkin || mat != currentMateri 66 if(kinEnergy != tkin || mat != currentMaterial) {
64 67
65 currentMaterial = mat; 68 currentMaterial = mat;
66 tkin = kinEnergy; 69 tkin = kinEnergy;
67 G4double momLab2 = tkin*(tkin + 2.0*mass) 70 G4double momLab2 = tkin*(tkin + 2.0*mass);
68 71
69 G4double etot = tkin + mass; 72 G4double etot = tkin + mass;
70 G4double ptot = std::sqrt(momLab2); 73 G4double ptot = std::sqrt(momLab2);
71 G4double m12 = mass*mass; 74 G4double m12 = mass*mass;
72 75
73 // relativistic reduced mass from publucat 76 // relativistic reduced mass from publucation
74 // A.P. Martynenko, R.N. Faustov, Teoret. 77 // A.P. Martynenko, R.N. Faustov, Teoret. mat. Fiz. 64 (1985) 179
75 78
76 //incident particle & target nucleus 79 //incident particle & target nucleus
77 G4double Ecm = std::sqrt(m12 + targetMass* 80 G4double Ecm = std::sqrt(m12 + targetMass*targetMass + 2.0*etot*targetMass);
78 G4double mu_rel = mass*targetMass/Ecm; 81 G4double mu_rel = mass*targetMass/Ecm;
79 G4double momCM = ptot*targetMass/Ecm; 82 G4double momCM = ptot*targetMass/Ecm;
80 // relative system 83 // relative system
81 mom2 = momCM*momCM; 84 mom2 = momCM*momCM;
82 invbeta2 = 1.0 + mu_rel*mu_rel/mom2; 85 invbeta2 = 1.0 + mu_rel*mu_rel/mom2;
83 86
84 factB = spin/invbeta2; 87 factB = spin/invbeta2;
85 factD = std::sqrt(mom2)/targetMass; 88 factD = std::sqrt(mom2)/targetMass;
86 cosTetMaxNuc = isCombined ? 89 cosTetMaxNuc = isCombined ?
87 std::max(cosThetaMax, 1.-factorA2*mat->G 90 std::max(cosThetaMax, 1.-factorA2*mat->GetIonisation()->GetInvA23()/mom2)
88 : cosThetaMax; 91 : cosThetaMax;
89 } 92 }
90 return cosTetMaxNuc; 93 return cosTetMaxNuc;
91 } 94 }
92 95
93 //....oooOO0OOooo........oooOO0OOooo........oo 96 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
94 97
95 98