source: trunk/source/processes/hadronic/models/neutron_hp/src/G4NeutronHPFinalState.cc@ 1350

Last change on this file since 1350 was 1347, checked in by garnier, 15 years ago

geant4 tag 9.4
File size: 9.6 KB
Line 
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
38void 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}
Note: See TracBrowser for help on using the repository browser.