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25 // 25 //
>> 26 // $Id: G4DeltaAngle.cc 68380 2013-03-22 18:39:29Z vnivanch $
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class file 30 // GEANT4 Class file
30 // 31 //
31 // 32 //
32 // File name: G4DeltaAngle 33 // File name: G4DeltaAngle
33 // 34 //
34 // Author: Vladimir Ivantcheko 35 // Author: Vladimir Ivantcheko
35 // 36 //
36 // Creation date: 23 August 2013 37 // Creation date: 23 August 2013
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 40 //
40 // Class Description: 41 // Class Description:
41 // 42 //
42 // Delta-electron Angular Distribution Generat 43 // Delta-electron Angular Distribution Generation
43 // 44 //
44 // Class Description: End 45 // Class Description: End
45 // 46 //
46 // ------------------------------------------- 47 // -------------------------------------------------------------------
47 // 48 //
48 49
49 #include "G4DeltaAngle.hh" 50 #include "G4DeltaAngle.hh"
50 #include "G4PhysicalConstants.hh" 51 #include "G4PhysicalConstants.hh"
51 #include "Randomize.hh" 52 #include "Randomize.hh"
52 #include "G4ParticleDefinition.hh" 53 #include "G4ParticleDefinition.hh"
53 #include "G4Electron.hh" 54 #include "G4Electron.hh"
54 #include "G4AtomicShells.hh" 55 #include "G4AtomicShells.hh"
55 #include "G4SystemOfUnits.hh" 56 #include "G4SystemOfUnits.hh"
56 #include "G4Log.hh" 57 #include "G4Log.hh"
57 58
58 using namespace std; 59 using namespace std;
59 60
60 G4DeltaAngle::G4DeltaAngle(const G4String&) 61 G4DeltaAngle::G4DeltaAngle(const G4String&)
61 : G4VEmAngularDistribution("deltaVI") 62 : G4VEmAngularDistribution("deltaVI")
62 { 63 {
63 fElectron = G4Electron::Electron(); 64 fElectron = G4Electron::Electron();
64 nprob = 26; 65 nprob = 26;
65 fShellIdx = -1; <<
66 prob.resize(nprob,0.0); 66 prob.resize(nprob,0.0);
>> 67 fShellIdx = -1;
67 } 68 }
68 69
69 G4DeltaAngle::~G4DeltaAngle() = default; << 70 G4DeltaAngle::~G4DeltaAngle()
>> 71 {}
70 72
71 G4ThreeVector& 73 G4ThreeVector&
72 G4DeltaAngle::SampleDirectionForShell(const G4 74 G4DeltaAngle::SampleDirectionForShell(const G4DynamicParticle* dp,
73 G4double kinEner << 75 G4double kinEnergyFinal, G4int Z, G4int idx,
74 const G4Material << 76 const G4Material* mat)
75 { 77 {
76 fShellIdx = idx; 78 fShellIdx = idx;
77 return SampleDirection(dp, kinEnergyFinal,Z, 79 return SampleDirection(dp, kinEnergyFinal,Z, mat);
78 } 80 }
79 81
80 G4ThreeVector& 82 G4ThreeVector&
81 G4DeltaAngle::SampleDirection(const G4DynamicP 83 G4DeltaAngle::SampleDirection(const G4DynamicParticle* dp,
82 G4double kinEner << 84 G4double kinEnergyFinal, G4int Z,
83 const G4Material << 85 const G4Material*)
84 { 86 {
85 G4int nShells = G4AtomicShells::GetNumberOfS 87 G4int nShells = G4AtomicShells::GetNumberOfShells(Z);
86 G4int idx = fShellIdx; 88 G4int idx = fShellIdx;
87 89
88 // if idx is not properly defined sample she 90 // if idx is not properly defined sample shell index
89 if(idx < 0 || idx >= nShells) { 91 if(idx < 0 || idx >= nShells) {
90 if(nShells> nprob) { 92 if(nShells> nprob) {
91 nprob = nShells; 93 nprob = nShells;
92 prob.resize(nprob,0.0); 94 prob.resize(nprob,0.0);
93 } 95 }
94 G4double sum = 0.0; 96 G4double sum = 0.0;
95 for(idx=0; idx<nShells; ++idx) { 97 for(idx=0; idx<nShells; ++idx) {
96 sum += G4AtomicShells::GetNumberOfElectr 98 sum += G4AtomicShells::GetNumberOfElectrons(Z, idx)
97 /G4AtomicShells::GetBindingEnergy(Z, i << 99 /G4AtomicShells::GetBindingEnergy(Z, idx);
98 prob[idx] = sum; 100 prob[idx] = sum;
99 } 101 }
100 sum *= G4UniformRand(); 102 sum *= G4UniformRand();
101 for(idx=0; idx<nShells; ++idx) { 103 for(idx=0; idx<nShells; ++idx) {
102 if(sum <= prob[idx]) { break; } 104 if(sum <= prob[idx]) { break; }
103 } 105 }
104 } 106 }
105 G4double bindingEnergy = G4AtomicShells::Get 107 G4double bindingEnergy = G4AtomicShells::GetBindingEnergy(Z, idx);
106 G4double cost; 108 G4double cost;
107 /* 109 /*
108 G4cout << "E(keV)= " << kinEnergyFinal/keV 110 G4cout << "E(keV)= " << kinEnergyFinal/keV
109 << " Ebind(keV)= " << bindingEnergy << 111 << " Ebind(keV)= " << bindingEnergy
110 << " idx= " << idx << " nShells= " << << 112 << " idx= " << idx << " nShells= " << nShells << G4endl;
111 */ 113 */
112 G4int n = 0; 114 G4int n = 0;
113 G4bool isOK = false; 115 G4bool isOK = false;
114 static const G4int nmax = 100; 116 static const G4int nmax = 100;
115 do { 117 do {
116 ++n; 118 ++n;
117 // the atomic electron 119 // the atomic electron
118 G4double x = -G4Log(G4UniformRand()); 120 G4double x = -G4Log(G4UniformRand());
119 G4double eKinEnergy = bindingEnergy*x; 121 G4double eKinEnergy = bindingEnergy*x;
120 G4double ePotEnergy = bindingEnergy*(1.0 + 122 G4double ePotEnergy = bindingEnergy*(1.0 + x);
121 G4double e = kinEnergyFinal + ePotEnergy + 123 G4double e = kinEnergyFinal + ePotEnergy + electron_mass_c2;
122 G4double p = sqrt((e + electron_mass_c2)*( 124 G4double p = sqrt((e + electron_mass_c2)*(e - electron_mass_c2));
123 125
124 G4double totEnergy = dp->GetTotalEnergy(); 126 G4double totEnergy = dp->GetTotalEnergy();
125 G4double totMomentum = dp->GetTotalMomentu 127 G4double totMomentum = dp->GetTotalMomentum();
126 if(dp->GetParticleDefinition() == fElectro 128 if(dp->GetParticleDefinition() == fElectron) {
127 totEnergy += ePotEnergy; 129 totEnergy += ePotEnergy;
128 totMomentum = sqrt((totEnergy + electron 130 totMomentum = sqrt((totEnergy + electron_mass_c2)
129 *(totEnergy - electro << 131 *(totEnergy - electron_mass_c2));
130 } 132 }
131 133
132 G4double eTotEnergy = eKinEnergy + electro 134 G4double eTotEnergy = eKinEnergy + electron_mass_c2;
133 G4double eTotMomentum = sqrt(eKinEnergy*(e 135 G4double eTotMomentum = sqrt(eKinEnergy*(eTotEnergy + electron_mass_c2));
134 G4double costet = 2*G4UniformRand() - 1; 136 G4double costet = 2*G4UniformRand() - 1;
135 G4double sintet = sqrt((1 - costet)*(1 + c 137 G4double sintet = sqrt((1 - costet)*(1 + costet));
136 138
137 cost = 1.0; 139 cost = 1.0;
138 if(n >= nmax) { 140 if(n >= nmax) {
139 /* 141 /*
140 G4ExceptionDescription ed; 142 G4ExceptionDescription ed;
141 ed << "### G4DeltaAngle Warning: " << n 143 ed << "### G4DeltaAngle Warning: " << n
142 << " iterations - stop the loop with << 144 << " iterations - stop the loop with cost= 1.0 "
143 << " for " << dp->GetDefinition()->Ge << 145 << " for " << dp->GetDefinition()->GetParticleName() << "\n"
144 << " Ekin(MeV)= " << dp->GetKineticEn << 146 << " Ekin(MeV)= " << dp->GetKineticEnergy()/MeV
145 << " Efinal(MeV)= " << kinEnergyFinal << 147 << " Efinal(MeV)= " << kinEnergyFinal/MeV
146 << " Ebinding(MeV)= " << bindingEnerg << 148 << " Ebinding(MeV)= " << bindingEnergy/MeV;
147 G4Exception("G4DeltaAngle::SampleDirecti 149 G4Exception("G4DeltaAngle::SampleDirection","em0044",
148 JustWarning, ed,""); 150 JustWarning, ed,"");
149 */ 151 */
150 if(0.0 == bindingEnergy) { isOK = true; 152 if(0.0 == bindingEnergy) { isOK = true; }
151 bindingEnergy = 0.0; 153 bindingEnergy = 0.0;
152 } 154 }
153 155
154 G4double x0 = p*(totMomentum + eTotMomentu 156 G4double x0 = p*(totMomentum + eTotMomentum*costet);
155 /* 157 /*
156 G4cout << " x0= " << x0 << " p= " << p 158 G4cout << " x0= " << x0 << " p= " << p
157 << " ptot= " << totMomentum << " p << 159 << " ptot= " << totMomentum << " pe= " << eTotMomentum
158 << " e= " << e << " totMom= " << t << 160 << " e= " << e << " totMom= " << totMomentum
159 << G4endl; << 161 << G4endl;
160 */ 162 */
161 if(x0 > 0.0) { 163 if(x0 > 0.0) {
162 G4double x1 = p*eTotMomentum*sintet; 164 G4double x1 = p*eTotMomentum*sintet;
163 G4double x2 = totEnergy*(eTotEnergy - e) 165 G4double x2 = totEnergy*(eTotEnergy - e) - e*eTotEnergy
164 - totMomentum*eTotMomentum*costet + el << 166 - totMomentum*eTotMomentum*costet + electron_mass_c2*electron_mass_c2;
165 G4double y = -x2/x0; 167 G4double y = -x2/x0;
166 if(std::abs(y) <= 1.0) { << 168 if(std::fabs(y) <= 1.0) {
167 cost = -(x2 + x1*sqrt(1. - y*y))/x0; << 169 cost = -(x2 + x1*sqrt(1. - y*y))/x0;
168 if(std::abs(cost) <= 1.0) { isOK = tru << 170 if(std::fabs(cost) <= 1.0) { isOK = true; }
169 else { cost = 1.0; } 171 else { cost = 1.0; }
170 } 172 }
171 173
172 /* 174 /*
173 G4cout << " Ekin(MeV)= " << dp->GetKinet 175 G4cout << " Ekin(MeV)= " << dp->GetKineticEnergy()
174 << " e1(keV)= " << eKinEnergy/ke << 176 << " e1(keV)= " << eKinEnergy/keV
175 << " e2(keV)= " << (e - electron_ << 177 << " e2(keV)= " << (e - electron_mass_c2)/keV
176 << " 1-cost= " << 1-cost << 178 << " 1-cost= " << 1-cost
177 << " x0= " << x0 << " x1= " << x1 << 179 << " x0= " << x0 << " x1= " << x1 << " x2= " << x2
178 << G4endl; << 180 << G4endl;
179 */ 181 */
180 } 182 }
181 183
182 // Loop checking, 03-Aug-2015, Vladimir Iv <<
183 } while(!isOK); 184 } while(!isOK);
184 185
185 G4double sint = sqrt((1 - cost)*(1 + cost)); 186 G4double sint = sqrt((1 - cost)*(1 + cost));
186 G4double phi = twopi*G4UniformRand(); 187 G4double phi = twopi*G4UniformRand();
187 188
188 fLocalDirection.set(sint*cos(phi), sint*sin( 189 fLocalDirection.set(sint*cos(phi), sint*sin(phi), cost);
189 fLocalDirection.rotateUz(dp->GetMomentumDire 190 fLocalDirection.rotateUz(dp->GetMomentumDirection());
190 191
191 return fLocalDirection; 192 return fLocalDirection;
192 } 193 }
>> 194
>> 195 void G4DeltaAngle::PrintGeneratorInformation() const
>> 196 {}
193 197