| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer << 3 // * DISCLAIMER *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th << 5 // * The following disclaimer summarizes all the specific disclaimers *
6 // * the Geant4 Collaboration. It is provided << 6 // * of contributors to this software. The specific disclaimers,which *
7 // * conditions of the Geant4 Software License << 7 // * govern, are listed with their locations in: *
8 // * LICENSE and available at http://cern.ch/ << 8 // * http://cern.ch/geant4/license *
9 // * include a list of copyright holders. <<
10 // * 9 // * *
11 // * Neither the authors of this software syst 10 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 11 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 12 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 13 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file << 14 // * use. *
16 // * for the full disclaimer and the limitatio <<
17 // * 15 // * *
18 // * This code implementation is the result << 16 // * This code implementation is the intellectual property of the *
19 // * technical work of the GEANT4 collaboratio << 17 // * GEANT4 collaboration. *
20 // * By using, copying, modifying or distri << 18 // * By copying, distributing or modifying the Program (or any work *
21 // * any work based on the software) you ag << 19 // * based on the Program) you indicate your acceptance of this *
22 // * use in resulting scientific publicati << 20 // * statement, and all its terms. *
23 // * acceptance of all terms of the Geant4 Sof <<
24 // ******************************************* 21 // ********************************************************************
25 // 22 //
26 // 23 //
27 // ------------------------------------------- 24 // -------------------------------------------------------------------
28 // GEANT 4 class implementation file 25 // GEANT 4 class implementation file
29 // 26 //
30 // CERN, Geneva, Switzerland 27 // CERN, Geneva, Switzerland
31 // 28 //
32 // File name: G4KM_OpticalEqRhs.cc 29 // File name: G4KM_OpticalEqRhs.cc
33 // 30 //
34 // Author: Alessandro Brunengo (Al 31 // Author: Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it)
35 // 32 //
36 // Creation date: 5 June 2000 33 // Creation date: 5 June 2000
37 // ------------------------------------------- 34 // -------------------------------------------------------------------
38 35
39 #include "G4KM_OpticalEqRhs.hh" 36 #include "G4KM_OpticalEqRhs.hh"
40 #include "G4PhysicalConstants.hh" << 37 #include "G4NucleiPropertiesTable.hh"
41 #include "G4NucleiProperties.hh" <<
42 #include "G4VNuclearDensity.hh" 38 #include "G4VNuclearDensity.hh"
43 #include "G4HadTmpUtil.hh" 39 #include "G4HadTmpUtil.hh"
44 40
>> 41
45 G4KM_OpticalEqRhs::G4KM_OpticalEqRhs(G4KM_Dumm 42 G4KM_OpticalEqRhs::G4KM_OpticalEqRhs(G4KM_DummyField *field,
46 G4V3DNucleus * nucleus) : 43 G4V3DNucleus * nucleus) :
47 G4Mag_EqRhs(field), theNucleus(nucleus) 44 G4Mag_EqRhs(field), theNucleus(nucleus)
48 { 45 {
49 theFactor = 0; 46 theFactor = 0;
50 theMass = 0; 47 theMass = 0;
51 } 48 }
52 49
53 50
54 void G4KM_OpticalEqRhs::SetFactor(G4double mas 51 void G4KM_OpticalEqRhs::SetFactor(G4double mass, G4double opticalParameter)
55 { 52 {
56 G4double A = theNucleus->GetMassNumber(); 53 G4double A = theNucleus->GetMassNumber();
57 G4double Z = theNucleus->GetCharge(); 54 G4double Z = theNucleus->GetCharge();
58 G4double bindingEnergy = G4NucleiProperties: << 55 G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
59 G4double nucleusMass = Z*proton_mass_c2+(A-Z 56 G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
60 G4double reducedMass = mass*nucleusMass/(mas 57 G4double reducedMass = mass*nucleusMass/(mass+nucleusMass);
61 58
62 G4double nucleonMass = (proton_mass_c2+neutr 59 G4double nucleonMass = (proton_mass_c2+neutron_mass_c2)/2;
63 60
64 // _factor in (MeV*fermi)*fermi/MeV = fermi*fe 61 // _factor in (MeV*fermi)*fermi/MeV = fermi*fermi -- need to have A as density normalized to 1
65 theFactor = 2*pi*hbarc*hbarc*(1+mass/nucleon 62 theFactor = 2*pi*hbarc*hbarc*(1+mass/nucleonMass)* opticalParameter/reducedMass * A;
66 63
67 theMass = mass; 64 theMass = mass;
68 } 65 }
69 66
70 67
71 void G4KM_OpticalEqRhs::EvaluateRhsGivenB(cons 68 void G4KM_OpticalEqRhs::EvaluateRhsGivenB(const G4double y[], const G4double *,
72 G4double dydx[]) const 69 G4double dydx[]) const
73 { 70 {
74 G4double yMod = std::sqrt(y[0]*y[0]+y[1]*y[1 << 71 G4double yMod = sqrt(y[0]*y[0]+y[1]*y[1]+y[2]*y[2]);
75 G4double e = std::sqrt(theMass*theMass+y[3]* << 72 G4double e = sqrt(theMass*theMass+y[3]*y[3]+y[4]*y[4]+y[5]*y[5]);
76 dydx[0] = c_light*y[3]/e; // 73 dydx[0] = c_light*y[3]/e; //
77 dydx[1] = c_light*y[4]/e; // dq/dt=dH/dp 74 dydx[1] = c_light*y[4]/e; // dq/dt=dH/dp = c*p/e
78 dydx[2] = c_light*y[5]/e; // 75 dydx[2] = c_light*y[5]/e; //
79 76
80 // V=K*rho(r) ==> dydx[3] = -dV/dr*dr/dx = -K* 77 // V=K*rho(r) ==> dydx[3] = -dV/dr*dr/dx = -K*d(rho)/dr*dr/dx.
81 // Idem for dydx[4] and dydx[5] 78 // Idem for dydx[4] and dydx[5]
82 79
83 const G4VNuclearDensity * nuclearDensity=the 80 const G4VNuclearDensity * nuclearDensity=theNucleus->GetNuclearDensity();
84 81
85 G4ThreeVector pos(y[0],y[1],y[2]); 82 G4ThreeVector pos(y[0],y[1],y[2]);
86 G4double deriv = theFactor*nuclearDensity->G 83 G4double deriv = theFactor*nuclearDensity->GetDeriv(pos);
87 84
88 dydx[3] = yMod == 0 ? 0 : -deriv*y[0]/yMod*c 85 dydx[3] = yMod == 0 ? 0 : -deriv*y[0]/yMod*c_light;
89 dydx[4] = yMod == 0 ? 0 : -deriv*y[1]/yMod*c 86 dydx[4] = yMod == 0 ? 0 : -deriv*y[1]/yMod*c_light;
90 dydx[5] = yMod == 0 ? 0 : -deriv*y[2]/yMod*c 87 dydx[5] = yMod == 0 ? 0 : -deriv*y[2]/yMod*c_light;
91 } 88 }
92 89
93 // Here by design, but it is unnecessary for n << 90
94 void G4KM_OpticalEqRhs::SetChargeMomentumMass( << 91
95 { << 92
96 } <<
97 93