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25 // 25 //
26 // G4RToEConvForProton class implementation <<
27 // 26 //
28 // Author: H.Kurashige, 05 October 2002 - Firs << 27 //
29 // ------------------------------------------- << 28 //
>> 29 // --------------------------------------------------------------
>> 30 // GEANT 4 class implementation file/ History:
>> 31 // 5 Oct. 2002, H.Kuirashige : Structure created based on object model
>> 32 // --------------------------------------------------------------
30 33
31 #include "G4RToEConvForProton.hh" 34 #include "G4RToEConvForProton.hh"
32 #include "G4ParticleTable.hh" 35 #include "G4ParticleTable.hh"
>> 36 #include "G4Material.hh"
>> 37 #include "G4PhysicsLogVector.hh"
33 38
>> 39 #include "G4ios.hh"
34 #include "G4PhysicalConstants.hh" 40 #include "G4PhysicalConstants.hh"
35 #include "G4SystemOfUnits.hh" 41 #include "G4SystemOfUnits.hh"
36 42
37 // ------------------------------------------- <<
38 G4RToEConvForProton::G4RToEConvForProton() 43 G4RToEConvForProton::G4RToEConvForProton()
39 : G4VRangeToEnergyConverter() << 44 : G4VRangeToEnergyConverter(),
>> 45 Mass(0.0),
>> 46 Z(-1.),
>> 47 tau0(0.0), taul(0.0), taum(0.0),
>> 48 ionpot(0.0),
>> 49 ca(0.0), cba(0.0), cc(0.0)
40 { 50 {
41 theParticle = G4ParticleTable::GetParticleTa << 51 theParticle = G4ParticleTable::GetParticleTable()->FindParticle("proton");
42 if (theParticle == nullptr) << 52 if (theParticle ==0) {
43 { <<
44 #ifdef G4VERBOSE 53 #ifdef G4VERBOSE
45 if (GetVerboseLevel()>0) << 54 if (GetVerboseLevel()>0) {
46 { << 55 G4cout << " G4RToEConvForProton::G4RToEConvForProton() ";
47 G4cout << "G4RToEConvForProton::G4RToECo << 56 G4cout << " proton is not defined !!" << G4endl;
48 G4cout << "Proton is not defined !!" << <<
49 } 57 }
50 #endif 58 #endif
51 } << 59 } else {
52 else << 60 Mass = theParticle->GetPDGMass();
53 { << 61 }
54 fPDG = theParticle->GetPDGEncoding(); <<
55 } <<
56 } 62 }
57 63
58 // ------------------------------------------- <<
59 G4RToEConvForProton::~G4RToEConvForProton() 64 G4RToEConvForProton::~G4RToEConvForProton()
60 {} << 65 {
>> 66 }
61 67
62 // ------------------------------------------- << 68
63 G4double G4RToEConvForProton::Convert(const G4 << 69 G4double G4RToEConvForProton::Convert(G4double rangeCut, const G4Material* )
64 const G4 <<
65 { 70 {
66 #ifdef G4VERBOSE << 71 // Simple formula
67 if (GetVerboseLevel()>3) << 72 // range = Ekin/(100*keV)*(1*mm);
68 { << 73 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 } 74 }
76 75
77 // ------------------------------------------- << 76
78 G4double G4RToEConvForProton::ComputeValue(con << 77 // **********************************************************************
>> 78 // ************************* ComputeLoss ********************************
>> 79 // **********************************************************************
>> 80 G4double G4RToEConvForProton::ComputeLoss(G4double AtomicNumber,
>> 81 G4double KineticEnergy)
79 { 82 {
80 return 0.0; << 83 // calculate dE/dx
>> 84 const G4double z2Particle = 1.0;
>> 85
>> 86 if( std::fabs(AtomicNumber-Z)>0.1 ){
>> 87 // recalculate constants
>> 88 Z = AtomicNumber;
>> 89 G4double Z13 = std::exp(std::log(Z)/3.);
>> 90 tau0 = 0.1*Z13*MeV/proton_mass_c2;
>> 91 taum = 0.035*Z13*MeV/proton_mass_c2;
>> 92 taul = 2.*MeV/proton_mass_c2;
>> 93 ionpot = 1.6e-5*MeV*std::exp(0.9*std::log(Z));
>> 94 cc = (taul+1.)*(taul+1.)*std::log(2.*electron_mass_c2*taul*(taul+2.)/ionpot)/(taul*(taul+2.))-1.;
>> 95 cc = 2.*twopi_mc2_rcl2*Z*cc*std::sqrt(taul);
>> 96 ca = cc/((1.-0.5*std::sqrt(tau0/taum))*tau0);
>> 97 cba = -0.5/std::sqrt(taum);
>> 98 }
>> 99
>> 100 G4double tau = KineticEnergy/Mass;
>> 101 G4double dEdx;
>> 102 if ( tau <= tau0 ) {
>> 103 dEdx = ca*(std::sqrt(tau)+cba*tau);
>> 104 } else {
>> 105 if( tau <= taul ) {
>> 106 dEdx = cc/std::sqrt(tau);
>> 107 } else {
>> 108 dEdx = (tau+1.)*(tau+1.)*
>> 109 std::log(2.*electron_mass_c2*tau*(tau+2.)/ionpot)/(tau*(tau+2.))-1.;
>> 110 dEdx = 2.*twopi_mc2_rcl2*Z*dEdx;
>> 111 }
>> 112 }
>> 113 return dEdx*z2Particle ;
81 } 114 }
82 115
83 // ------------------------------------------- << 116
>> 117 // **********************************************************************
>> 118 // ************************* Reset ********************************
>> 119 // **********************************************************************
>> 120 void G4RToEConvForProton::Reset()
>> 121 {
>> 122 // do nothing because loss tables and range vectors are not used
>> 123 return;
>> 124 }
84 125