1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // |
---|
27 | //080721 Create adjust_final_state method by T. Koi |
---|
28 | //080801 Residual reconstruction with theNDLDataA,Z (A, Z, and momentum are adjusted) by T. Koi |
---|
29 | //101110 Set lower limit for gamma energy(1keV) by T. Koi |
---|
30 | |
---|
31 | #include "G4NeutronHPFinalState.hh" |
---|
32 | |
---|
33 | #include "G4ParticleTable.hh" |
---|
34 | #include "G4Gamma.hh" |
---|
35 | |
---|
36 | |
---|
37 | |
---|
38 | void G4NeutronHPFinalState::adjust_final_state ( G4LorentzVector init_4p_lab ) |
---|
39 | { |
---|
40 | |
---|
41 | G4double minimum_energy = 1*keV; |
---|
42 | |
---|
43 | if ( adjustResult != true ) return; |
---|
44 | |
---|
45 | G4int nSecondaries = theResult.GetNumberOfSecondaries(); |
---|
46 | |
---|
47 | G4int sum_Z = 0; |
---|
48 | G4int sum_A = 0; |
---|
49 | G4int max_SecZ = 0; |
---|
50 | G4int max_SecA = 0; |
---|
51 | for ( int i = 0 ; i < nSecondaries ; i++ ) |
---|
52 | { |
---|
53 | sum_Z += theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicNumber(); |
---|
54 | max_SecZ = std::max ( max_SecZ , theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicNumber() ); |
---|
55 | sum_A += theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicMass(); |
---|
56 | max_SecA = std::max ( max_SecA , theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicMass() ); |
---|
57 | } |
---|
58 | |
---|
59 | G4ParticleDefinition* resi_pd = NULL; |
---|
60 | if ( (int)(theBaseZ - sum_Z) == 0 && (int)(theBaseA + 1 - sum_A) == 0 ) |
---|
61 | resi_pd = G4ParticleTable::GetParticleTable()->GetIon ( max_SecZ , max_SecA , 0.0 ); |
---|
62 | else |
---|
63 | { |
---|
64 | resi_pd = G4ParticleTable::GetParticleTable()->GetIon ( int(theBaseZ - sum_Z) , (int)(theBaseA + 1 - sum_A) , 0.0 ); |
---|
65 | if ( resi_pd == NULL ) |
---|
66 | { |
---|
67 | // theNDLDataZ,A has the Z and A of used NDL file |
---|
68 | if ( (int)(theNDLDataZ - sum_Z) == 0 && (int)(theNDLDataA + 1 - sum_A) == 0 ) |
---|
69 | { |
---|
70 | G4int dif_Z = ( int ) ( theNDLDataZ - theBaseZ ); |
---|
71 | G4int dif_A = ( int ) ( theNDLDataA - theBaseA ); |
---|
72 | resi_pd = G4ParticleTable::GetParticleTable()->GetIon ( max_SecZ - dif_Z , max_SecA - dif_A , 0.0 ); |
---|
73 | for ( int i = 0 ; i < nSecondaries ; i++ ) |
---|
74 | { |
---|
75 | if ( theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicNumber() == max_SecZ |
---|
76 | && theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicMass() == max_SecA ) |
---|
77 | { |
---|
78 | G4ThreeVector p = theResult.GetSecondary( i )->GetParticle()->GetMomentum(); |
---|
79 | p = p * resi_pd->GetPDGMass()/ G4ParticleTable::GetParticleTable()->GetIon ( max_SecZ , max_SecA , 0.0 )->GetPDGMass(); |
---|
80 | theResult.GetSecondary( i )->GetParticle()->SetDefinition( resi_pd ); |
---|
81 | theResult.GetSecondary( i )->GetParticle()->SetMomentum( p ); |
---|
82 | } |
---|
83 | } |
---|
84 | } |
---|
85 | } |
---|
86 | } |
---|
87 | |
---|
88 | |
---|
89 | G4LorentzVector secs_4p_lab( 0.0 ); |
---|
90 | |
---|
91 | G4int n_sec = theResult.GetNumberOfSecondaries(); |
---|
92 | G4double fast = 0; |
---|
93 | G4double slow = 1; |
---|
94 | G4int ifast = 0; |
---|
95 | G4int islow = 0; |
---|
96 | G4int ires = -1; |
---|
97 | |
---|
98 | for ( G4int i = 0 ; i < n_sec ; i++ ) |
---|
99 | { |
---|
100 | |
---|
101 | //G4cout << "HP_DB " << i |
---|
102 | // << " " << theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetParticleName() |
---|
103 | // << " 4p " << theResult.GetSecondary( i )->GetParticle()->Get4Momentum() |
---|
104 | // << " ke " << theResult.GetSecondary( i )->GetParticle()->Get4Momentum().e() - theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetPDGMass() |
---|
105 | // << G4endl; |
---|
106 | |
---|
107 | secs_4p_lab += theResult.GetSecondary( i )->GetParticle()->Get4Momentum(); |
---|
108 | |
---|
109 | G4double beta = 0; |
---|
110 | if ( theResult.GetSecondary( i )->GetParticle()->GetDefinition() != G4Gamma::Gamma() ) |
---|
111 | { |
---|
112 | beta = theResult.GetSecondary( i )->GetParticle()->Get4Momentum().beta(); |
---|
113 | } |
---|
114 | else |
---|
115 | { |
---|
116 | beta = 1; |
---|
117 | } |
---|
118 | |
---|
119 | if ( theResult.GetSecondary( i )->GetParticle()->GetDefinition() == resi_pd ) ires = i; |
---|
120 | |
---|
121 | if ( slow > beta && beta != 0 ) |
---|
122 | { |
---|
123 | slow = beta; |
---|
124 | islow = i; |
---|
125 | } |
---|
126 | |
---|
127 | if ( fast <= beta ) |
---|
128 | { |
---|
129 | if ( fast != 1 ) |
---|
130 | { |
---|
131 | fast = beta; |
---|
132 | ifast = i; |
---|
133 | } |
---|
134 | else |
---|
135 | { |
---|
136 | // fast is already photon then check E |
---|
137 | G4double e = theResult.GetSecondary( i )->GetParticle()->Get4Momentum().e(); |
---|
138 | if ( e > theResult.GetSecondary( ifast )->GetParticle()->Get4Momentum().e() ) |
---|
139 | { |
---|
140 | // among photons, the highest E becomes the fastest |
---|
141 | ifast = i; |
---|
142 | } |
---|
143 | } |
---|
144 | } |
---|
145 | } |
---|
146 | |
---|
147 | |
---|
148 | G4LorentzVector dif_4p = init_4p_lab - secs_4p_lab; |
---|
149 | |
---|
150 | //G4cout << "HP_DB dif_4p " << init_4p_lab - secs_4p_lab << G4endl; |
---|
151 | //G4cout << "HP_DB dif_3p mag " << ( dif_4p.v() ).mag() << G4endl; |
---|
152 | //G4cout << "HP_DB dif_e " << dif_4p.e() - ( dif_4p.v() ).mag()<< G4endl; |
---|
153 | |
---|
154 | G4LorentzVector p4(0); |
---|
155 | if ( ires == -1 ) |
---|
156 | { |
---|
157 | // Create and Add Residual Nucleus |
---|
158 | ires = nSecondaries; |
---|
159 | nSecondaries += 1; |
---|
160 | |
---|
161 | G4DynamicParticle* res = new G4DynamicParticle ( resi_pd , dif_4p.v() ); |
---|
162 | theResult.AddSecondary ( res ); |
---|
163 | |
---|
164 | p4 = res->Get4Momentum(); |
---|
165 | if ( slow > p4.beta() ) |
---|
166 | { |
---|
167 | slow = p4.beta(); |
---|
168 | islow = ires; |
---|
169 | } |
---|
170 | |
---|
171 | dif_4p = init_4p_lab - ( secs_4p_lab + p4 ); |
---|
172 | } |
---|
173 | |
---|
174 | //Which is bigger dif_p or dif_e |
---|
175 | |
---|
176 | if ( dif_4p.v().mag() < std::abs( dif_4p.e() ) ) |
---|
177 | { |
---|
178 | |
---|
179 | // Adjust p |
---|
180 | //if ( dif_4p.v().mag() < 1*MeV ) |
---|
181 | if ( minimum_energy < dif_4p.v().mag() && dif_4p.v().mag() < 1*MeV ) |
---|
182 | { |
---|
183 | |
---|
184 | nSecondaries += 1; |
---|
185 | theResult.AddSecondary ( new G4DynamicParticle ( G4Gamma::Gamma() , dif_4p.v() ) ); |
---|
186 | |
---|
187 | } |
---|
188 | else |
---|
189 | { |
---|
190 | //G4cout << "HP_DB Difference in dif_p is too large (>1MeV) or too small(<1keV) to adjust, so that give up tuning" << G4endl; |
---|
191 | } |
---|
192 | |
---|
193 | } |
---|
194 | else |
---|
195 | { |
---|
196 | |
---|
197 | // dif_p > dif_e |
---|
198 | // at first momentum |
---|
199 | // Move residual momentum |
---|
200 | |
---|
201 | p4 = theResult.GetSecondary( ires )->GetParticle()->Get4Momentum(); |
---|
202 | theResult.GetSecondary( ires )->GetParticle()->SetMomentum( p4.v() + dif_4p.v() ); |
---|
203 | dif_4p = init_4p_lab - ( secs_4p_lab - p4 + theResult.GetSecondary( ires )->GetParticle()->Get4Momentum() ); |
---|
204 | |
---|
205 | //G4cout << "HP_DB new residual kinetic energy " << theResult.GetSecondary( ires )->GetParticle()->GetKineticEnergy() << G4endl; |
---|
206 | |
---|
207 | } |
---|
208 | |
---|
209 | G4double dif_e = dif_4p.e() - ( dif_4p.v() ).mag(); |
---|
210 | //G4cout << "HP_DB dif_e " << dif_e << G4endl; |
---|
211 | |
---|
212 | if ( dif_e > 0 ) |
---|
213 | { |
---|
214 | |
---|
215 | // create 2 gamma |
---|
216 | |
---|
217 | nSecondaries += 2; |
---|
218 | G4double e1 = ( dif_4p.e() -dif_4p.v().mag() ) / 2; |
---|
219 | |
---|
220 | if ( minimum_energy < e1 ) |
---|
221 | { |
---|
222 | G4double costh = 2.*G4UniformRand()-1.; |
---|
223 | G4double phi = twopi*G4UniformRand(); |
---|
224 | G4ThreeVector dir( std::sin(std::acos(costh))*std::cos(phi), |
---|
225 | std::sin(std::acos(costh))*std::sin(phi), |
---|
226 | costh); |
---|
227 | theResult.AddSecondary ( new G4DynamicParticle ( G4Gamma::Gamma() , e1*dir ) ); |
---|
228 | theResult.AddSecondary ( new G4DynamicParticle ( G4Gamma::Gamma() , -e1*dir ) ); |
---|
229 | } |
---|
230 | else |
---|
231 | { |
---|
232 | //G4cout << "HP_DB Difference is too small(<1keV) to adjust, so that neglect it" << G4endl; |
---|
233 | } |
---|
234 | |
---|
235 | } |
---|
236 | else //dif_e < 0 |
---|
237 | { |
---|
238 | |
---|
239 | // At first reduce KE of the fastest secondary; |
---|
240 | G4double ke0 = theResult.GetSecondary( ifast )->GetParticle()->GetKineticEnergy(); |
---|
241 | G4ThreeVector p0 = theResult.GetSecondary( ifast )->GetParticle()->GetMomentum(); |
---|
242 | G4ThreeVector dir = ( theResult.GetSecondary( ifast )->GetParticle()->GetMomentum() ).unit(); |
---|
243 | |
---|
244 | //G4cout << "HP_DB ifast " << ifast << " ke0 " << ke0 << G4endl; |
---|
245 | |
---|
246 | if ( ke0 + dif_e > 0 ) |
---|
247 | { |
---|
248 | theResult.GetSecondary( ifast )->GetParticle()->SetKineticEnergy( ke0 + dif_e ); |
---|
249 | G4ThreeVector dp = p0 - theResult.GetSecondary( ifast )->GetParticle()->GetMomentum(); |
---|
250 | |
---|
251 | G4ThreeVector p = theResult.GetSecondary( islow )->GetParticle()->GetMomentum(); |
---|
252 | //theResult.GetSecondary( islow )->GetParticle()->SetMomentum( p - dif_e*dir ); |
---|
253 | theResult.GetSecondary( islow )->GetParticle()->SetMomentum( p + dp ); |
---|
254 | } |
---|
255 | else |
---|
256 | { |
---|
257 | //G4cout << "HP_DB Difference in dif_e too large ( <0MeV ) to adjust, so that give up tuning" << G4endl; |
---|
258 | } |
---|
259 | |
---|
260 | } |
---|
261 | |
---|
262 | } |
---|