Geant4 Cross Reference |
1 // 1 2 // ******************************************* 3 // * License and Disclaimer 4 // * 5 // * The Geant4 software is copyright of th 6 // * the Geant4 Collaboration. It is provided 7 // * conditions of the Geant4 Software License 8 // * LICENSE and available at http://cern.ch/ 9 // * include a list of copyright holders. 10 // * 11 // * Neither the authors of this software syst 12 // * institutes,nor the agencies providing fin 13 // * work make any representation or warran 14 // * regarding this software system or assum 15 // * use. Please see the license in the file 16 // * for the full disclaimer and the limitatio 17 // * 18 // * This code implementation is the result 19 // * technical work of the GEANT4 collaboratio 20 // * By using, copying, modifying or distri 21 // * any work based on the software) you ag 22 // * use in resulting scientific publicati 23 // * acceptance of all terms of the Geant4 Sof 24 // ******************************************* 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 50 //....oooOO0OOooo........oooOO0OOooo........oo 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