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25 // 25 //
26 // G4RToEConvForProton class implementation <<
27 // 26 //
28 // Author: H.Kurashige, 05 October 2002 - Firs << 27 // $Id: G4RToEConvForProton.cc 70745 2013-06-05 10:54:00Z gcosmo $
29 // ------------------------------------------- << 28 //
>> 29 //
>> 30 // --------------------------------------------------------------
>> 31 // GEANT 4 class implementation file/ History:
>> 32 // 5 Oct. 2002, H.Kuirashige : Structure created based on object model
>> 33 // --------------------------------------------------------------
30 34
31 #include "G4RToEConvForProton.hh" 35 #include "G4RToEConvForProton.hh"
32 #include "G4ParticleTable.hh" 36 #include "G4ParticleTable.hh"
>> 37 #include "G4Material.hh"
>> 38 #include "G4PhysicsLogVector.hh"
33 39
>> 40 #include "G4ios.hh"
34 #include "G4PhysicalConstants.hh" 41 #include "G4PhysicalConstants.hh"
35 #include "G4SystemOfUnits.hh" 42 #include "G4SystemOfUnits.hh"
36 43
37 // ------------------------------------------- <<
38 G4RToEConvForProton::G4RToEConvForProton() 44 G4RToEConvForProton::G4RToEConvForProton()
39 : G4VRangeToEnergyConverter() << 45 : G4VRangeToEnergyConverter(),
>> 46 Mass(0.0),
>> 47 Z(-1.),
>> 48 tau0(0.0), taul(0.0), taum(0.0),
>> 49 ionpot(0.0),
>> 50 ca(0.0), cba(0.0), cc(0.0)
40 { 51 {
41 theParticle = G4ParticleTable::GetParticleTa << 52 theParticle = G4ParticleTable::GetParticleTable()->FindParticle("proton");
42 if (theParticle == nullptr) << 53 if (theParticle ==0) {
43 { <<
44 #ifdef G4VERBOSE 54 #ifdef G4VERBOSE
45 if (GetVerboseLevel()>0) << 55 if (GetVerboseLevel()>0) {
46 { << 56 G4cout << " G4RToEConvForProton::G4RToEConvForProton() ";
47 G4cout << "G4RToEConvForProton::G4RToECo << 57 G4cout << " proton is not defined !!" << G4endl;
48 G4cout << "Proton is not defined !!" << <<
49 } 58 }
50 #endif 59 #endif
51 } << 60 } else {
52 else << 61 Mass = theParticle->GetPDGMass();
53 { << 62 }
54 fPDG = theParticle->GetPDGEncoding(); <<
55 } <<
56 } 63 }
57 64
58 // ------------------------------------------- <<
59 G4RToEConvForProton::~G4RToEConvForProton() 65 G4RToEConvForProton::~G4RToEConvForProton()
60 {} << 66 {
>> 67 }
61 68
62 // ------------------------------------------- << 69
63 G4double G4RToEConvForProton::Convert(const G4 << 70 G4double G4RToEConvForProton::Convert(G4double rangeCut, const G4Material* )
64 const G4 <<
65 { 71 {
66 #ifdef G4VERBOSE << 72 // Simple formula
67 if (GetVerboseLevel()>3) << 73 // range = Ekin/(100*keV)*(1*mm);
68 { << 74 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 } 75 }
76 76
77 // ------------------------------------------- << 77
78 G4double G4RToEConvForProton::ComputeValue(con << 78 // **********************************************************************
>> 79 // ************************* ComputeLoss ********************************
>> 80 // **********************************************************************
>> 81 G4double G4RToEConvForProton::ComputeLoss(G4double AtomicNumber,
>> 82 G4double KineticEnergy)
79 { 83 {
80 return 0.0; << 84 // calculate dE/dx
>> 85 const G4double z2Particle = 1.0;
>> 86
>> 87 if( std::fabs(AtomicNumber-Z)>0.1 ){
>> 88 // recalculate constants
>> 89 Z = AtomicNumber;
>> 90 G4double Z13 = std::exp(std::log(Z)/3.);
>> 91 tau0 = 0.1*Z13*MeV/proton_mass_c2;
>> 92 taum = 0.035*Z13*MeV/proton_mass_c2;
>> 93 taul = 2.*MeV/proton_mass_c2;
>> 94 ionpot = 1.6e-5*MeV*std::exp(0.9*std::log(Z));
>> 95 cc = (taul+1.)*(taul+1.)*std::log(2.*electron_mass_c2*taul*(taul+2.)/ionpot)/(taul*(taul+2.))-1.;
>> 96 cc = 2.*twopi_mc2_rcl2*Z*cc*std::sqrt(taul);
>> 97 ca = cc/((1.-0.5*std::sqrt(tau0/taum))*tau0);
>> 98 cba = -0.5/std::sqrt(taum);
>> 99 }
>> 100
>> 101 G4double tau = KineticEnergy/Mass;
>> 102 G4double dEdx;
>> 103 if ( tau <= tau0 ) {
>> 104 dEdx = ca*(std::sqrt(tau)+cba*tau);
>> 105 } else {
>> 106 if( tau <= taul ) {
>> 107 dEdx = cc/std::sqrt(tau);
>> 108 } else {
>> 109 dEdx = (tau+1.)*(tau+1.)*
>> 110 std::log(2.*electron_mass_c2*tau*(tau+2.)/ionpot)/(tau*(tau+2.))-1.;
>> 111 dEdx = 2.*twopi_mc2_rcl2*Z*dEdx;
>> 112 }
>> 113 }
>> 114 return dEdx*z2Particle ;
81 } 115 }
82 116
83 // ------------------------------------------- << 117
>> 118 // **********************************************************************
>> 119 // ************************* Reset ********************************
>> 120 // **********************************************************************
>> 121 void G4RToEConvForProton::Reset()
>> 122 {
>> 123 // do nothing because loss tables and range vectors are not used
>> 124 return;
>> 125 }
84 126