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25 // 25 //
26 // G4RToEConvForProton class implementation <<
27 // 26 //
28 // Author: H.Kurashige, 05 October 2002 - Firs << 27 // $Id: G4RToEConvForProton.cc,v 1.3.4.1 2010/01/26 13:56:43 gcosmo Exp $
29 // ------------------------------------------- << 28 // GEANT4 tag $Name: geant4-09-02-patch-03 $
>> 29 //
>> 30 //
>> 31 // --------------------------------------------------------------
>> 32 // GEANT 4 class implementation file/ History:
>> 33 // 5 Oct. 2002, H.Kuirashige : Structure created based on object model
>> 34 // --------------------------------------------------------------
30 35
31 #include "G4RToEConvForProton.hh" 36 #include "G4RToEConvForProton.hh"
32 #include "G4ParticleTable.hh" 37 #include "G4ParticleTable.hh"
>> 38 #include "G4Material.hh"
>> 39 #include "G4PhysicsLogVector.hh"
33 40
34 #include "G4PhysicalConstants.hh" << 41 #include "G4ios.hh"
35 #include "G4SystemOfUnits.hh" <<
36 42
37 // ------------------------------------------- << 43 G4RToEConvForProton::G4RToEConvForProton() : G4VRangeToEnergyConverter()
38 G4RToEConvForProton::G4RToEConvForProton() <<
39 : G4VRangeToEnergyConverter() <<
40 { 44 {
41 theParticle = G4ParticleTable::GetParticleTa << 45 theParticle = G4ParticleTable::GetParticleTable()->FindParticle("proton");
42 if (theParticle == nullptr) << 46 if (theParticle ==0) {
43 { <<
44 #ifdef G4VERBOSE 47 #ifdef G4VERBOSE
45 if (GetVerboseLevel()>0) << 48 if (GetVerboseLevel()>0) {
46 { << 49 G4cout << " G4RToEConvForProton::G4RToEConvForProton() ";
47 G4cout << "G4RToEConvForProton::G4RToECo << 50 G4cout << " proton is not defined !!" << G4endl;
48 G4cout << "Proton is not defined !!" << <<
49 } 51 }
50 #endif 52 #endif
51 } << 53 }
52 else <<
53 { <<
54 fPDG = theParticle->GetPDGEncoding(); <<
55 } <<
56 } 54 }
57 55
58 // ------------------------------------------- <<
59 G4RToEConvForProton::~G4RToEConvForProton() 56 G4RToEConvForProton::~G4RToEConvForProton()
60 {} << 57 {
>> 58 }
61 59
62 // ------------------------------------------- << 60
63 G4double G4RToEConvForProton::Convert(const G4 << 61 G4double G4RToEConvForProton::Convert(G4double rangeCut, const G4Material* )
64 const G4 <<
65 { 62 {
66 #ifdef G4VERBOSE << 63 // Simple formula
67 if (GetVerboseLevel()>3) << 64 // range = Ekin/(100*keV)*(1*mm);
68 { << 65 return (rangeCut/(1.0*mm)) * (100.0*keV);
69 G4cout << "G4RToEConvForProton::Convert() <<
70 G4cout << " with Range Cut " << rangeCut/m <<
71 } <<
72 #endif <<
73 // Simple formula - range = Ekin/(100*keV)*( <<
74 return (rangeCut/(1.0*CLHEP::mm)) * (100.0*C <<
75 } 66 }
76 67
77 // ------------------------------------------- << 68
78 G4double G4RToEConvForProton::ComputeValue(con << 69 // **********************************************************************
>> 70 // ************************* ComputeLoss ********************************
>> 71 // **********************************************************************
>> 72 G4double G4RToEConvForProton::ComputeLoss(G4double AtomicNumber,
>> 73 G4double KineticEnergy) const
79 { 74 {
80 return 0.0; << 75 // calculate dE/dx
>> 76
>> 77 static G4double Z;
>> 78 static G4double ionpot, tau0, taum, taul, ca, cba, cc;
>> 79
>> 80 G4double z2Particle = theParticle->GetPDGCharge()/eplus;
>> 81 z2Particle *= z2Particle;
>> 82 if (z2Particle < 0.1) return 0.0;
>> 83
>> 84 if( std::fabs(AtomicNumber-Z)>0.1 ){
>> 85 // recalculate constants
>> 86 Z = AtomicNumber;
>> 87 G4double Z13 = std::exp(std::log(Z)/3.);
>> 88 tau0 = 0.1*Z13*MeV/proton_mass_c2;
>> 89 taum = 0.035*Z13*MeV/proton_mass_c2;
>> 90 taul = 2.*MeV/proton_mass_c2;
>> 91 ionpot = 1.6e-5*MeV*std::exp(0.9*std::log(Z));
>> 92 cc = (taul+1.)*(taul+1.)*std::log(2.*electron_mass_c2*taul*(taul+2.)/ionpot)/(taul*(taul+2.))-1.;
>> 93 cc = 2.*twopi_mc2_rcl2*Z*cc*std::sqrt(taul);
>> 94 ca = cc/((1.-0.5*std::sqrt(tau0/taum))*tau0);
>> 95 cba = -0.5/std::sqrt(taum);
>> 96 }
>> 97
>> 98 G4double tau = KineticEnergy/theParticle->GetPDGMass();
>> 99 G4double dEdx;
>> 100 if ( tau <= tau0 ) {
>> 101 dEdx = ca*(std::sqrt(tau)+cba*tau);
>> 102 } else {
>> 103 if( tau <= taul ) {
>> 104 dEdx = cc/std::sqrt(tau);
>> 105 } else {
>> 106 dEdx = (tau+1.)*(tau+1.)*
>> 107 std::log(2.*electron_mass_c2*tau*(tau+2.)/ionpot)/(tau*(tau+2.))-1.;
>> 108 dEdx = 2.*twopi_mc2_rcl2*Z*dEdx;
>> 109 }
>> 110 }
>> 111 return dEdx*z2Particle ;
81 } 112 }
82 113
83 // ------------------------------------------- << 114
>> 115 // **********************************************************************
>> 116 // ************************* Reset ********************************
>> 117 // **********************************************************************
>> 118 void G4RToEConvForProton::Reset()
>> 119 {
>> 120 // do nothing because loss tables and range vectors are not used
>> 121 return;
>> 122 }
84 123