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25 // 25 //
26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class file 29 // GEANT4 Class file
30 // 30 //
31 // 31 //
32 // File name: G4DeltaAngle 32 // File name: G4DeltaAngle
33 // 33 //
34 // Author: Vladimir Ivantcheko 34 // Author: Vladimir Ivantcheko
35 // 35 //
36 // Creation date: 23 August 2013 36 // Creation date: 23 August 2013
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 39 //
40 // Class Description: 40 // Class Description:
41 // 41 //
42 // Delta-electron Angular Distribution Generat 42 // Delta-electron Angular Distribution Generation
43 // 43 //
44 // Class Description: End 44 // Class Description: End
45 // 45 //
46 // ------------------------------------------- 46 // -------------------------------------------------------------------
47 // 47 //
48 48
49 #include "G4DeltaAngle.hh" 49 #include "G4DeltaAngle.hh"
50 #include "G4PhysicalConstants.hh" 50 #include "G4PhysicalConstants.hh"
51 #include "Randomize.hh" 51 #include "Randomize.hh"
52 #include "G4ParticleDefinition.hh" 52 #include "G4ParticleDefinition.hh"
53 #include "G4Electron.hh" 53 #include "G4Electron.hh"
54 #include "G4AtomicShells.hh" 54 #include "G4AtomicShells.hh"
55 #include "G4SystemOfUnits.hh" 55 #include "G4SystemOfUnits.hh"
56 #include "G4Log.hh" 56 #include "G4Log.hh"
57 57
58 using namespace std; 58 using namespace std;
59 59
60 G4DeltaAngle::G4DeltaAngle(const G4String&) 60 G4DeltaAngle::G4DeltaAngle(const G4String&)
61 : G4VEmAngularDistribution("deltaVI") 61 : G4VEmAngularDistribution("deltaVI")
62 { 62 {
63 fElectron = G4Electron::Electron(); 63 fElectron = G4Electron::Electron();
64 nprob = 26; 64 nprob = 26;
65 fShellIdx = -1; 65 fShellIdx = -1;
66 prob.resize(nprob,0.0); 66 prob.resize(nprob,0.0);
67 } 67 }
68 68
69 G4DeltaAngle::~G4DeltaAngle() = default; 69 G4DeltaAngle::~G4DeltaAngle() = default;
70 70
71 G4ThreeVector& 71 G4ThreeVector&
72 G4DeltaAngle::SampleDirectionForShell(const G4 72 G4DeltaAngle::SampleDirectionForShell(const G4DynamicParticle* dp,
73 G4double kinEner 73 G4double kinEnergyFinal, G4int Z, G4int idx,
74 const G4Material 74 const G4Material* mat)
75 { 75 {
76 fShellIdx = idx; 76 fShellIdx = idx;
77 return SampleDirection(dp, kinEnergyFinal,Z, 77 return SampleDirection(dp, kinEnergyFinal,Z, mat);
78 } 78 }
79 79
80 G4ThreeVector& 80 G4ThreeVector&
81 G4DeltaAngle::SampleDirection(const G4DynamicP 81 G4DeltaAngle::SampleDirection(const G4DynamicParticle* dp,
82 G4double kinEner 82 G4double kinEnergyFinal, G4int Z,
83 const G4Material 83 const G4Material*)
84 { 84 {
85 G4int nShells = G4AtomicShells::GetNumberOfS 85 G4int nShells = G4AtomicShells::GetNumberOfShells(Z);
86 G4int idx = fShellIdx; 86 G4int idx = fShellIdx;
87 87
88 // if idx is not properly defined sample she 88 // if idx is not properly defined sample shell index
89 if(idx < 0 || idx >= nShells) { 89 if(idx < 0 || idx >= nShells) {
90 if(nShells> nprob) { 90 if(nShells> nprob) {
91 nprob = nShells; 91 nprob = nShells;
92 prob.resize(nprob,0.0); 92 prob.resize(nprob,0.0);
93 } 93 }
94 G4double sum = 0.0; 94 G4double sum = 0.0;
95 for(idx=0; idx<nShells; ++idx) { 95 for(idx=0; idx<nShells; ++idx) {
96 sum += G4AtomicShells::GetNumberOfElectr 96 sum += G4AtomicShells::GetNumberOfElectrons(Z, idx)
97 /G4AtomicShells::GetBindingEnergy(Z, i 97 /G4AtomicShells::GetBindingEnergy(Z, idx);
98 prob[idx] = sum; 98 prob[idx] = sum;
99 } 99 }
100 sum *= G4UniformRand(); 100 sum *= G4UniformRand();
101 for(idx=0; idx<nShells; ++idx) { 101 for(idx=0; idx<nShells; ++idx) {
102 if(sum <= prob[idx]) { break; } 102 if(sum <= prob[idx]) { break; }
103 } 103 }
104 } 104 }
105 G4double bindingEnergy = G4AtomicShells::Get 105 G4double bindingEnergy = G4AtomicShells::GetBindingEnergy(Z, idx);
106 G4double cost; 106 G4double cost;
107 /* 107 /*
108 G4cout << "E(keV)= " << kinEnergyFinal/keV 108 G4cout << "E(keV)= " << kinEnergyFinal/keV
109 << " Ebind(keV)= " << bindingEnergy 109 << " Ebind(keV)= " << bindingEnergy
110 << " idx= " << idx << " nShells= " << 110 << " idx= " << idx << " nShells= " << nShells << G4endl;
111 */ 111 */
112 G4int n = 0; 112 G4int n = 0;
113 G4bool isOK = false; 113 G4bool isOK = false;
114 static const G4int nmax = 100; 114 static const G4int nmax = 100;
115 do { 115 do {
116 ++n; 116 ++n;
117 // the atomic electron 117 // the atomic electron
118 G4double x = -G4Log(G4UniformRand()); 118 G4double x = -G4Log(G4UniformRand());
119 G4double eKinEnergy = bindingEnergy*x; 119 G4double eKinEnergy = bindingEnergy*x;
120 G4double ePotEnergy = bindingEnergy*(1.0 + 120 G4double ePotEnergy = bindingEnergy*(1.0 + x);
121 G4double e = kinEnergyFinal + ePotEnergy + 121 G4double e = kinEnergyFinal + ePotEnergy + electron_mass_c2;
122 G4double p = sqrt((e + electron_mass_c2)*( 122 G4double p = sqrt((e + electron_mass_c2)*(e - electron_mass_c2));
123 123
124 G4double totEnergy = dp->GetTotalEnergy(); 124 G4double totEnergy = dp->GetTotalEnergy();
125 G4double totMomentum = dp->GetTotalMomentu 125 G4double totMomentum = dp->GetTotalMomentum();
126 if(dp->GetParticleDefinition() == fElectro 126 if(dp->GetParticleDefinition() == fElectron) {
127 totEnergy += ePotEnergy; 127 totEnergy += ePotEnergy;
128 totMomentum = sqrt((totEnergy + electron 128 totMomentum = sqrt((totEnergy + electron_mass_c2)
129 *(totEnergy - electro 129 *(totEnergy - electron_mass_c2));
130 } 130 }
131 131
132 G4double eTotEnergy = eKinEnergy + electro 132 G4double eTotEnergy = eKinEnergy + electron_mass_c2;
133 G4double eTotMomentum = sqrt(eKinEnergy*(e 133 G4double eTotMomentum = sqrt(eKinEnergy*(eTotEnergy + electron_mass_c2));
134 G4double costet = 2*G4UniformRand() - 1; 134 G4double costet = 2*G4UniformRand() - 1;
135 G4double sintet = sqrt((1 - costet)*(1 + c 135 G4double sintet = sqrt((1 - costet)*(1 + costet));
136 136
137 cost = 1.0; 137 cost = 1.0;
138 if(n >= nmax) { 138 if(n >= nmax) {
139 /* 139 /*
140 G4ExceptionDescription ed; 140 G4ExceptionDescription ed;
141 ed << "### G4DeltaAngle Warning: " << n 141 ed << "### G4DeltaAngle Warning: " << n
142 << " iterations - stop the loop with 142 << " iterations - stop the loop with cost= 1.0 "
143 << " for " << dp->GetDefinition()->Ge 143 << " for " << dp->GetDefinition()->GetParticleName() << "\n"
144 << " Ekin(MeV)= " << dp->GetKineticEn 144 << " Ekin(MeV)= " << dp->GetKineticEnergy()/MeV
145 << " Efinal(MeV)= " << kinEnergyFinal 145 << " Efinal(MeV)= " << kinEnergyFinal/MeV
146 << " Ebinding(MeV)= " << bindingEnerg 146 << " Ebinding(MeV)= " << bindingEnergy/MeV;
147 G4Exception("G4DeltaAngle::SampleDirecti 147 G4Exception("G4DeltaAngle::SampleDirection","em0044",
148 JustWarning, ed,""); 148 JustWarning, ed,"");
149 */ 149 */
150 if(0.0 == bindingEnergy) { isOK = true; 150 if(0.0 == bindingEnergy) { isOK = true; }
151 bindingEnergy = 0.0; 151 bindingEnergy = 0.0;
152 } 152 }
153 153
154 G4double x0 = p*(totMomentum + eTotMomentu 154 G4double x0 = p*(totMomentum + eTotMomentum*costet);
155 /* 155 /*
156 G4cout << " x0= " << x0 << " p= " << p 156 G4cout << " x0= " << x0 << " p= " << p
157 << " ptot= " << totMomentum << " p 157 << " ptot= " << totMomentum << " pe= " << eTotMomentum
158 << " e= " << e << " totMom= " << t 158 << " e= " << e << " totMom= " << totMomentum
159 << G4endl; 159 << G4endl;
160 */ 160 */
161 if(x0 > 0.0) { 161 if(x0 > 0.0) {
162 G4double x1 = p*eTotMomentum*sintet; 162 G4double x1 = p*eTotMomentum*sintet;
163 G4double x2 = totEnergy*(eTotEnergy - e) 163 G4double x2 = totEnergy*(eTotEnergy - e) - e*eTotEnergy
164 - totMomentum*eTotMomentum*costet + el 164 - totMomentum*eTotMomentum*costet + electron_mass_c2*electron_mass_c2;
165 G4double y = -x2/x0; 165 G4double y = -x2/x0;
166 if(std::abs(y) <= 1.0) { 166 if(std::abs(y) <= 1.0) {
167 cost = -(x2 + x1*sqrt(1. - y*y))/x0; 167 cost = -(x2 + x1*sqrt(1. - y*y))/x0;
168 if(std::abs(cost) <= 1.0) { isOK = tru 168 if(std::abs(cost) <= 1.0) { isOK = true; }
169 else { cost = 1.0; } 169 else { cost = 1.0; }
170 } 170 }
171 171
172 /* 172 /*
173 G4cout << " Ekin(MeV)= " << dp->GetKinet 173 G4cout << " Ekin(MeV)= " << dp->GetKineticEnergy()
174 << " e1(keV)= " << eKinEnergy/ke 174 << " e1(keV)= " << eKinEnergy/keV
175 << " e2(keV)= " << (e - electron_ 175 << " e2(keV)= " << (e - electron_mass_c2)/keV
176 << " 1-cost= " << 1-cost 176 << " 1-cost= " << 1-cost
177 << " x0= " << x0 << " x1= " << x1 177 << " x0= " << x0 << " x1= " << x1 << " x2= " << x2
178 << G4endl; 178 << G4endl;
179 */ 179 */
180 } 180 }
181 181
182 // Loop checking, 03-Aug-2015, Vladimir Iv 182 // Loop checking, 03-Aug-2015, Vladimir Ivanchenko
183 } while(!isOK); 183 } while(!isOK);
184 184
185 G4double sint = sqrt((1 - cost)*(1 + cost)); 185 G4double sint = sqrt((1 - cost)*(1 + cost));
186 G4double phi = twopi*G4UniformRand(); 186 G4double phi = twopi*G4UniformRand();
187 187
188 fLocalDirection.set(sint*cos(phi), sint*sin( 188 fLocalDirection.set(sint*cos(phi), sint*sin(phi), cost);
189 fLocalDirection.rotateUz(dp->GetMomentumDire 189 fLocalDirection.rotateUz(dp->GetMomentumDirection());
190 190
191 return fLocalDirection; 191 return fLocalDirection;
192 } 192 }
193 193