| Geant4 Cross Reference |
1 // 1
2 // *******************************************
3 // * License and Disclaimer
4 // *
5 // * The Geant4 software is copyright of th
6 // * the Geant4 Collaboration. It is provided
7 // * conditions of the Geant4 Software License
8 // * LICENSE and available at http://cern.ch/
9 // * include a list of copyright holders.
10 // *
11 // * Neither the authors of this software syst
12 // * institutes,nor the agencies providing fin
13 // * work make any representation or warran
14 // * regarding this software system or assum
15 // * use. Please see the license in the file
16 // * for the full disclaimer and the limitatio
17 // *
18 // * This code implementation is the result
19 // * technical work of the GEANT4 collaboratio
20 // * By using, copying, modifying or distri
21 // * any work based on the software) you ag
22 // * use in resulting scientific publicati
23 // * acceptance of all terms of the Geant4 Sof
24 // *******************************************
25 //
26 //////////////////////////////////////////////
27 //
28 // File: G4ECDecay.cc
29 // Author: D.H. Wright (SLAC)
30 // Date: 25 November 2014
31 //
32 //////////////////////////////////////////////
33
34 #include "G4ECDecay.hh"
35 #include "G4IonTable.hh"
36 #include "Randomize.hh"
37 #include "G4ThreeVector.hh"
38 #include "G4DynamicParticle.hh"
39 #include "G4DecayProducts.hh"
40 #include "G4VAtomDeexcitation.hh"
41 #include "G4AtomicShells.hh"
42 #include "G4Electron.hh"
43 #include "G4LossTableManager.hh"
44 #include "G4PhysicalConstants.hh"
45 #include "G4SystemOfUnits.hh"
46
47 G4ECDecay::G4ECDecay(const G4ParticleDefinitio
48 const G4double& branch, c
49 const G4double& excitatio
50 const G4Ions::G4FloatLeve
51 const G4RadioactiveDecayM
52 : G4NuclearDecay("electron capture", mode, ex
53 applyARM(true)
54 {
55 SetParent(theParentNucleus); // Store name
56 SetBR(branch);
57
58 SetNumberOfDaughters(2);
59 G4IonTable* theIonTable =
60 (G4IonTable*)(G4ParticleTable::GetParticle
61 G4int daughterZ = theParentNucleus->GetAtomi
62 G4int daughterA = theParentNucleus->GetAtomi
63 SetDaughter(0, theIonTable->GetIon(daughterZ
64 SetDaughter(1, "nu_e");
65 DefineSubshellProbabilities(daughterZ, daugh
66 }
67
68
69 G4ECDecay::~G4ECDecay()
70 {}
71
72
73 G4DecayProducts* G4ECDecay::DecayIt(G4double)
74 {
75 // Fill G4MT_parent with theParentNucleus (s
76 CheckAndFillParent();
77
78 // Fill G4MT_daughters with alpha and residu
79 CheckAndFillDaughters();
80
81 // Get shell number of captured electron
82 G4int shellIndex = -1;
83 G4double ran;
84 switch (theMode)
85 {
86 case KshellEC:
87 shellIndex = 0;
88 break;
89 case LshellEC: // PL1+PL2+PL3=1
90 ran=G4UniformRand();
91 if (ran <= PL1) shellIndex =1;
92 else if (ran<= (PL1+PL2)) shellIndex =2;
93 else shellIndex =3;
94 break;
95 case MshellEC: // PM1+PM2+PM3=1
96 ran=G4UniformRand();
97 if (ran < PM1) shellIndex =4;
98 else if (ran< (PM1+PM2)) shellIndex =5;
99 else shellIndex = 6;
100 break;
101 case NshellEC: // PN1+PN2+PN3=1
102 ran=G4UniformRand();
103 if (ran < PN1) shellIndex = 9;
104 else if (ran<= (PN1+PN2)) shellIndex =2;
105 else shellIndex =10;
106 break;
107 default:
108 G4Exception("G4ECDecay::DecayIt()", "HAD
109 FatalException, "Invalid ele
110 }
111
112 // Initialize decay products with parent nuc
113 G4DynamicParticle parentParticle(G4MT_parent
114 G4DecayProducts* products = new G4DecayProdu
115 G4double eBind = 0.0;
116
117 // G4LossTableManager must already be initia
118 // This is currently done in G4RadioactiveDe
119 G4VAtomDeexcitation* atomDeex =
120 G4LossTableManager::Instance()->Atom
121 std::vector<G4DynamicParticle*> armProducts;
122
123 if (applyARM) {
124 if (nullptr != atomDeex) {
125 G4int aZ = G4MT_daughters[0]->GetAtomicN
126 G4int nShells = G4AtomicShells::GetNumbe
127 if (shellIndex >= nShells) shellIndex =
128 G4AtomicShellEnumerator as = G4AtomicShe
129 const G4AtomicShell* shell = atomDeex->G
130 eBind = shell->BindingEnergy();
131 if (atomDeex->IsFluoActive() && aZ > 5 &
132 // Do atomic relaxation
133 // VI, SI
134 // Allows fixing of Bugzilla 1727
135 //const G4double deexLimit = 0.1*keV;
136 G4double deexLimit = 0.1*keV;
137 if (G4EmParameters::Instance()->Deexcitation
138
139 atomDeex->GenerateParticles(&armProduc
140 }
141
142 G4double productEnergy = 0.;
143 for (std::size_t i = 0; i < armProducts.
144 productEnergy += armProducts[i]->GetKi
145 }
146 G4double deficit = shell->BindingEnergy(
147 if (deficit > 0.0) {
148 // Add a dummy electron to make up ext
149 G4double cosTh = 1.-2.*G4UniformRand()
150 G4double sinTh = std::sqrt(1.- cosTh*c
151 G4double phi = twopi*G4UniformRand();
152
153 G4ThreeVector electronDirection(sinTh*
154 sinTh*
155 G4DynamicParticle* extra =
156 new G4DynamicParticle(G4Electron::El
157 deficit);
158 armProducts.push_back(extra);
159 }
160 } // atomDeex
161 } // applyARM
162
163 G4double daughterMass = G4MT_daughters[0]->G
164
165 // CM momentum using Q value corrected for b
166 G4double Q = transitionQ - eBind;
167
168 // Negative transitionQ values for some rare
169 // Absolute values in these cases are small
170 if (Q < 0.0) Q = 0.0;
171
172 G4double cmMomentum = Q*(Q + 2.*daughterMass
173
174 G4double costheta = 2.*G4UniformRand() - 1.0
175 G4double sintheta = std::sqrt(1.0 - costheta
176 G4double phi = twopi*G4UniformRand()*rad;
177 G4ThreeVector direction(sintheta*std::cos(ph
178 costheta);
179 G4double KE = cmMomentum;
180 G4DynamicParticle* daughterParticle =
181 new G4DynamicParticle(G4MT_daughters[1], d
182 products->PushProducts(daughterParticle);
183
184 KE = std::sqrt(cmMomentum*cmMomentum + daugh
185 daughterParticle =
186 new G4DynamicParticle(G4MT_daughters[0], -
187 products->PushProducts(daughterParticle);
188
189 std::size_t nArm = armProducts.size();
190 if (nArm > 0) {
191 G4ThreeVector bst = daughterParticle->Get4
192 for (std::size_t i = 0; i < nArm; ++i) {
193 G4DynamicParticle* dp = armProducts[i];
194 G4LorentzVector lv = dp->Get4Momentum().
195 dp->Set4Momentum(lv);
196 products->PushProducts(dp);
197 }
198 }
199
200 // Energy conservation check
201 /*
202 G4int newSize = products->entries();
203 G4DynamicParticle* temp = 0;
204 G4double KEsum = 0.0;
205 for (G4int i = 0; i < newSize; i++) {
206 temp = products->operator[](i);
207 KEsum += temp->GetKineticEnergy();
208 }
209
210 G4double eCons = (transitionQ - KEsum)/keV;
211 G4cout << " EC check: Ediff (keV) = " << eCo
212 */
213 return products;
214 }
215
216
217 void G4ECDecay::DumpNuclearInfo()
218 {
219 G4cout << " G4ECDecay of parent nucleus " <<
220 if (theMode == 3) {
221 G4cout << "K shell";
222 } else if (theMode == 4) {
223 G4cout << "L shell";
224 } else if (theMode == 5) {
225 G4cout << "M shell";
226 }
227 else if (theMode == 6) {
228 G4cout << "N shell";
229 }
230 G4cout << G4endl;
231 G4cout << " to " << GetDaughterName(0) << "
232 << " with branching ratio " << GetBR(
233 << transitionQ << G4endl;
234 }
235 void G4ECDecay::DefineSubshellProbabilities(G4
236 { //Implementation for the case of allowed tra
237 //PL1+PL2=1. , PM1+PM2=1., PN1+PN2=1.
238 PL1 = 1./(1+PL2overPL1[Z-1]);
239 PL2 = PL1*PL2overPL1[Z-1];
240 PM1 = 1./(1+PM2overPM1[Z-1]);
241 PM2 = PM1*PM2overPM1[Z-1];
242 PN1 = 1./(1+PN2overPN1[Z-1]);
243 PN2 = PN1*PN2overPN1[Z-1];
244 }
245 //////////////////////////////////////////////
246 // Table of subshell ratio probability PL2/PL1
247 // PL2/PL1 = (fL2/gL1)^2
248 // with gL1 and fL2 the bound electron radial
249 // Bambynek et al., Rev. Modern Phy
250 // For Z=18 interpolation between Z=17 and Z=
251 //////////////////////////////////////////////
252 const G4double G4ECDecay::PL2overPL1[100] = {
253 0.0000e+00, 0.0000e+00, 0.0000e+00, 0.00
254 2.6438e-04, 3.5456e-04, 4.5790e-04, 6.15
255 1.4361e-03, 1.6886e-03, 1.9609e-03, 2.26
256 3.6338e-03, 4.0310e-03, 4.4541e-03, 4.89
257 6.9061e-03, 7.4607e-03, 8.0398e-03, 8.64
258 1.1284e-02, 1.2004e-02, 1.2744e-02, 1.35
259 1.6857e-02, 1.7764e-02, 1.8696e-02, 1.96
260 2.3788e-02, 2.4896e-02, 2.6036e-02, 2.72
261 3.2220e-02, 3.3561e-02, 3.4937e-02, 3.63
262 4.2399e-02, 4.4010e-02, 4.5668e-02, 4.73
263 5.4625e-02, 5.6565e-02, 5.8547e-02, 6.05
264 6.9336e-02, 7.1667e-02, 7.4075e-02, 7.65
265 8.7135e-02, 8.9995e-02, 9.2919e-02, 9.59
266 1.0899e-01, 1.1249e-01, 1.1613e-01, 1.19
267 1.3627e-01, 1.4071e-01};
268 //////////////////////////////////////////////
269 // Table of subshell ratio probability PM2/PM1
270 // PM2/PM1 = (fM2/gM1)^2
271 // with gM1 and fM2 the bound electron radial
272 // Bambynek et al., Rev. Modern Phy
273 //////////////////////////////////////////////
274 const G4double G4ECDecay::PM2overPM1[100] = {
275 0.0000e+00, 0.0000e+00, 0.0000e+00, 0.00
276 0.0000e+00, 0.0000e+00, 0.0000e+00, 0.00
277 1.0210e-03, 1.2641e-03, 1.5231e-03, 1.79
278 3.3637e-03, 3.7909e-03, 4.2049e-03, 4.70
279 6.7045e-03, 7.2997e-03, 7.9438e-03, 8.62
280 1.1594e-02, 1.2408e-02, 1.3244e-02, 1.41
281 1.7910e-02, 1.8934e-02, 1.9986e-02, 2.10
282 2.5750e-02, 2.7006e-02, 2.8302e-02, 2.96
283 3.5328e-02, 3.6852e-02, 3.8414e-02, 4.00
284 4.6909e-02, 4.8767e-02, 5.0662e-02, 5.26
285 6.0930e-02, 6.3141e-02, 6.5413e-02, 6.77
286 7.7721e-02, 8.0408e-02, 8.3128e-02, 8.59
287 9.8025e-02, 1.0130e-01, 1.0463e-01, 1.08
288 1.2290e-01, 1.2688e-01, 1.3101e-01, 1.35
289 1.5384e-01, 1.5887e-01};
290 //////////////////////////////////////////////
291 // Table of subshell ratio probability PN2/PN1
292 // PN2/PN1 = (fN2/gN1)^2
293 // with gN1 and fN2 are the bound electron rad
294 // Bambynek et al., Rev. Modern Phy
295 // For Z=44 interpolation between Z=43 and Z=
296 //////////////////////////////////////////////
297 const G4double G4ECDecay::PN2overPN1[100] = {
298 0.0000e+00, 0.0000e+00, 0.0000e+00, 0.00
299 0.0000e+00, 0.0000e+00, 0.0000e+00, 0.00
300 0.0000e+00, 0.0000e+00, 0.0000e+00, 0.00
301 0.0000e+00, 0.0000e+00, 0.0000e+00, 0.00
302 0.0000e+00, 0.0000e+00, 0.0000e+00, 0.00
303 0.0000e+00, 9.6988e-03, 1.0797e-02, 1.17
304 1.5511e-02, 1.6579e-02, 1.7646e-02, 1.87
305 2.3710e-02, 2.5058e-02, 2.6438e-02, 2.78
306 3.3843e-02, 3.5377e-02, 3.6886e-02, 3.85
307 4.5470e-02, 4.7247e-02, 4.9138e-02, 5.10
308 5.9366e-02, 6.1800e-02, 6.3945e-02, 6.63
309 7.6538e-02, 7.9276e-02, 8.2070e-02, 8.49
310 9.7337e-02, 1.0069e-01, 1.0410e-01, 1.07
311 1.2282e-01, 1.2709e-01, 1.3114e-01, 1.35
312 1.5443e-01, 1.5954e-01};
313
314