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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 // GEANT 4 class implementation file 29 // 30 // CERN, Geneva, Switzerland 31 // 32 // File name: G4KM_OpticalEqRhs.cc 33 // 34 // Author: Alessandro Brunengo (Al 35 // 36 // Creation date: 5 June 2000 37 // ------------------------------------------- 38 39 #include "G4KM_OpticalEqRhs.hh" 40 #include "G4PhysicalConstants.hh" 41 #include "G4NucleiProperties.hh" 42 #include "G4VNuclearDensity.hh" 43 #include "G4HadTmpUtil.hh" 44 45 G4KM_OpticalEqRhs::G4KM_OpticalEqRhs(G4KM_Dumm 46 G4V3DNucleus * nucleus) : 47 G4Mag_EqRhs(field), theNucleus(nucleus) 48 { 49 theFactor = 0; 50 theMass = 0; 51 } 52 53 54 void G4KM_OpticalEqRhs::SetFactor(G4double mas 55 { 56 G4double A = theNucleus->GetMassNumber(); 57 G4double Z = theNucleus->GetCharge(); 58 G4double bindingEnergy = G4NucleiProperties: 59 G4double nucleusMass = Z*proton_mass_c2+(A-Z 60 G4double reducedMass = mass*nucleusMass/(mas 61 62 G4double nucleonMass = (proton_mass_c2+neutr 63 64 // _factor in (MeV*fermi)*fermi/MeV = fermi*fe 65 theFactor = 2*pi*hbarc*hbarc*(1+mass/nucleon 66 67 theMass = mass; 68 } 69 70 71 void G4KM_OpticalEqRhs::EvaluateRhsGivenB(cons 72 G4double dydx[]) const 73 { 74 G4double yMod = std::sqrt(y[0]*y[0]+y[1]*y[1 75 G4double e = std::sqrt(theMass*theMass+y[3]* 76 dydx[0] = c_light*y[3]/e; // 77 dydx[1] = c_light*y[4]/e; // dq/dt=dH/dp 78 dydx[2] = c_light*y[5]/e; // 79 80 // V=K*rho(r) ==> dydx[3] = -dV/dr*dr/dx = -K* 81 // Idem for dydx[4] and dydx[5] 82 83 const G4VNuclearDensity * nuclearDensity=the 84 85 G4ThreeVector pos(y[0],y[1],y[2]); 86 G4double deriv = theFactor*nuclearDensity->G 87 88 dydx[3] = yMod == 0 ? 0 : -deriv*y[0]/yMod*c 89 dydx[4] = yMod == 0 ? 0 : -deriv*y[1]/yMod*c 90 dydx[5] = yMod == 0 ? 0 : -deriv*y[2]/yMod*c 91 } 92 93 // Here by design, but it is unnecessary for n 94 void G4KM_OpticalEqRhs::SetChargeMomentumMass( 95 { 96 } 97