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25 // 25 //
26 // G4RToEConvForProton class implementation 26 // G4RToEConvForProton class implementation
27 // 27 //
28 // Author: H.Kurashige, 05 October 2002 - Firs 28 // Author: H.Kurashige, 05 October 2002 - First implementation
29 // ------------------------------------------- 29 // --------------------------------------------------------------------
30 30
31 #include "G4RToEConvForProton.hh" 31 #include "G4RToEConvForProton.hh"
32 #include "G4ParticleTable.hh" 32 #include "G4ParticleTable.hh"
>> 33 #include "G4Material.hh"
>> 34 #include "G4PhysicsLogVector.hh"
33 35
>> 36 #include "G4ios.hh"
34 #include "G4PhysicalConstants.hh" 37 #include "G4PhysicalConstants.hh"
35 #include "G4SystemOfUnits.hh" 38 #include "G4SystemOfUnits.hh"
36 39
37 // ------------------------------------------- 40 // --------------------------------------------------------------------
38 G4RToEConvForProton::G4RToEConvForProton() 41 G4RToEConvForProton::G4RToEConvForProton()
39 : G4VRangeToEnergyConverter() 42 : G4VRangeToEnergyConverter()
40 { 43 {
41 theParticle = G4ParticleTable::GetParticleTa 44 theParticle = G4ParticleTable::GetParticleTable()->FindParticle("proton");
42 if (theParticle == nullptr) 45 if (theParticle == nullptr)
43 { 46 {
44 #ifdef G4VERBOSE 47 #ifdef G4VERBOSE
45 if (GetVerboseLevel()>0) 48 if (GetVerboseLevel()>0)
46 { 49 {
47 G4cout << "G4RToEConvForProton::G4RToECo 50 G4cout << "G4RToEConvForProton::G4RToEConvForProton() - ";
48 G4cout << "Proton is not defined !!" << 51 G4cout << "Proton is not defined !!" << G4endl;
49 } 52 }
50 #endif 53 #endif
51 } 54 }
52 else << 55 else
53 { 56 {
54 fPDG = theParticle->GetPDGEncoding(); << 57 Mass = theParticle->GetPDGMass();
55 } << 58 }
56 } 59 }
57 60
58 // ------------------------------------------- 61 // --------------------------------------------------------------------
59 G4RToEConvForProton::~G4RToEConvForProton() 62 G4RToEConvForProton::~G4RToEConvForProton()
60 {} << 63 {
>> 64 }
61 65
62 // ------------------------------------------- 66 // --------------------------------------------------------------------
63 G4double G4RToEConvForProton::Convert(const G4 << 67 G4double G4RToEConvForProton::Convert(G4double rangeCut, const G4Material* )
64 const G4 <<
65 { 68 {
66 #ifdef G4VERBOSE <<
67 if (GetVerboseLevel()>3) <<
68 { <<
69 G4cout << "G4RToEConvForProton::Convert() <<
70 G4cout << " with Range Cut " << rangeCut/m <<
71 } <<
72 #endif <<
73 // Simple formula - range = Ekin/(100*keV)*( 69 // Simple formula - range = Ekin/(100*keV)*(1*mm);
74 return (rangeCut/(1.0*CLHEP::mm)) * (100.0*C << 70
>> 71 return (rangeCut/(1.0*mm)) * (100.0*keV);
75 } 72 }
76 73
77 // ------------------------------------------- << 74 // **********************************************************************
78 G4double G4RToEConvForProton::ComputeValue(con << 75 // ************************* ComputeLoss ********************************
>> 76 // **********************************************************************
>> 77 G4double G4RToEConvForProton::ComputeLoss(G4double AtomicNumber,
>> 78 G4double KineticEnergy)
79 { 79 {
80 return 0.0; << 80 // calculate dE/dx
>> 81 const G4double z2Particle = 1.0;
>> 82
>> 83 if( std::fabs(AtomicNumber-Z)>0.1 )
>> 84 {
>> 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)
>> 93 / (taul*(taul+2.))-1.;
>> 94 cc = 2.*twopi_mc2_rcl2*Z*cc*std::sqrt(taul);
>> 95 ca = cc/((1.-0.5*std::sqrt(tau0/taum))*tau0);
>> 96 cba = -0.5/std::sqrt(taum);
>> 97 }
>> 98
>> 99 G4double tau = KineticEnergy/Mass;
>> 100 G4double dEdx;
>> 101 if ( tau <= tau0 )
>> 102 {
>> 103 dEdx = ca*(std::sqrt(tau)+cba*tau);
>> 104 }
>> 105 else
>> 106 {
>> 107 if( tau <= taul )
>> 108 {
>> 109 dEdx = cc/std::sqrt(tau);
>> 110 }
>> 111 else
>> 112 {
>> 113 dEdx = (tau+1.)*(tau+1.)
>> 114 * std::log(2.*electron_mass_c2*tau*(tau+2.)/ionpot)
>> 115 / (tau*(tau+2.))-1.;
>> 116 dEdx = 2.*twopi_mc2_rcl2*Z*dEdx;
>> 117 }
>> 118 }
>> 119 return dEdx*z2Particle ;
81 } 120 }
82 121
83 // ------------------------------------------- << 122 // **********************************************************************
>> 123 // ************************* Reset ********************************
>> 124 // **********************************************************************
>> 125 void G4RToEConvForProton::Reset()
>> 126 {
>> 127 // do nothing because loss tables and range vectors are not used
>> 128
>> 129 return;
>> 130 }
84 131