source: trunk/source/processes/hadronic/models/neutron_hp/src/G4NeutronHPFinalState.cc@ 1199

Last change on this file since 1199 was 968, checked in by garnier, 17 years ago

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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
30#include "G4NeutronHPFinalState.hh"
31
32#include "G4ParticleTable.hh"
33#include "G4Gamma.hh"
34
35
36
37void G4NeutronHPFinalState::adjust_final_state ( G4LorentzVector init_4p_lab )
38{
39
40 if ( adjustResult != true ) return;
41
42 G4int nSecondaries = theResult.GetNumberOfSecondaries();
43
44 G4int sum_Z = 0;
45 G4int sum_A = 0;
46 G4int max_SecZ = 0;
47 G4int max_SecA = 0;
48 for ( int i = 0 ; i < nSecondaries ; i++ )
49 {
50 sum_Z += theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicNumber();
51 max_SecZ = std::max ( max_SecZ , theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicNumber() );
52 sum_A += theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicMass();
53 max_SecA = std::max ( max_SecA , theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicMass() );
54 }
55
56 G4ParticleDefinition* resi_pd = NULL;
57 if ( (int)(theBaseZ - sum_Z) == 0 && (int)(theBaseA + 1 - sum_A) == 0 )
58 resi_pd = G4ParticleTable::GetParticleTable()->GetIon ( max_SecZ , max_SecA , 0.0 );
59 else
60 {
61 resi_pd = G4ParticleTable::GetParticleTable()->GetIon ( int(theBaseZ - sum_Z) , (int)(theBaseA + 1 - sum_A) , 0.0 );
62 if ( resi_pd == NULL )
63 {
64 // theNDLDataZ,A has the Z and A of used NDL file
65 if ( (int)(theNDLDataZ - sum_Z) == 0 && (int)(theNDLDataA + 1 - sum_A) == 0 )
66 {
67 G4int dif_Z = ( int ) ( theNDLDataZ - theBaseZ );
68 G4int dif_A = ( int ) ( theNDLDataA - theBaseA );
69 resi_pd = G4ParticleTable::GetParticleTable()->GetIon ( max_SecZ - dif_Z , max_SecA - dif_A , 0.0 );
70 for ( int i = 0 ; i < nSecondaries ; i++ )
71 {
72 if ( theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicNumber() == max_SecZ
73 && theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetAtomicMass() == max_SecA )
74 {
75 G4ThreeVector p = theResult.GetSecondary( i )->GetParticle()->GetMomentum();
76 p = p * resi_pd->GetPDGMass()/ G4ParticleTable::GetParticleTable()->GetIon ( max_SecZ , max_SecA , 0.0 )->GetPDGMass();
77 theResult.GetSecondary( i )->GetParticle()->SetDefinition( resi_pd );
78 theResult.GetSecondary( i )->GetParticle()->SetMomentum( p );
79 }
80 }
81 }
82 }
83 }
84
85
86 G4LorentzVector secs_4p_lab( 0.0 );
87
88 G4int n_sec = theResult.GetNumberOfSecondaries();
89 G4double fast = 0;
90 G4double slow = 1;
91 G4int ifast = 0;
92 G4int islow = 0;
93 G4int ires = -1;
94
95 for ( G4int i = 0 ; i < n_sec ; i++ )
96 {
97
98 //G4cout << "HP_DB " << i
99 // << " " << theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetParticleName()
100 // << " 4p " << theResult.GetSecondary( i )->GetParticle()->Get4Momentum()
101 // << " ke " << theResult.GetSecondary( i )->GetParticle()->Get4Momentum().e() - theResult.GetSecondary( i )->GetParticle()->GetDefinition()->GetPDGMass()
102 // << G4endl;
103
104 secs_4p_lab += theResult.GetSecondary( i )->GetParticle()->Get4Momentum();
105
106 G4double beta = 0;
107 if ( theResult.GetSecondary( i )->GetParticle()->GetDefinition() != G4Gamma::Gamma() )
108 {
109 beta = theResult.GetSecondary( i )->GetParticle()->Get4Momentum().beta();
110 }
111 else
112 {
113 beta = 1;
114 }
115
116 if ( theResult.GetSecondary( i )->GetParticle()->GetDefinition() == resi_pd ) ires = i;
117
118 if ( slow > beta && beta != 0 )
119 {
120 slow = beta;
121 islow = i;
122 }
123
124 if ( fast <= beta )
125 {
126 if ( fast != 1 )
127 {
128 fast = beta;
129 ifast = i;
130 }
131 else
132 {
133// fast is already photon then check E
134 G4double e = theResult.GetSecondary( i )->GetParticle()->Get4Momentum().e();
135 if ( e > theResult.GetSecondary( ifast )->GetParticle()->Get4Momentum().e() )
136 {
137// among photons, the highest E becomes the fastest
138 ifast = i;
139 }
140 }
141 }
142 }
143
144
145 G4LorentzVector dif_4p = init_4p_lab - secs_4p_lab;
146
147 //G4cout << "HP_DB dif_4p " << init_4p_lab - secs_4p_lab << G4endl;
148 //G4cout << "HP_DB dif_3p mag " << ( dif_4p.v() ).mag() << G4endl;
149 //G4cout << "HP_DB dif_e " << dif_4p.e() - ( dif_4p.v() ).mag()<< G4endl;
150
151 G4LorentzVector p4(0);
152 if ( ires == -1 )
153 {
154// Create and Add Residual Nucleus
155 ires = nSecondaries;
156 nSecondaries += 1;
157
158 G4DynamicParticle* res = new G4DynamicParticle ( resi_pd , dif_4p.v() );
159 theResult.AddSecondary ( res );
160
161 p4 = res->Get4Momentum();
162 if ( slow > p4.beta() )
163 {
164 slow = p4.beta();
165 islow = ires;
166 }
167
168 dif_4p = init_4p_lab - ( secs_4p_lab + p4 );
169 }
170
171 //Which is bigger dif_p or dif_e
172
173 if ( dif_4p.v().mag() < std::abs( dif_4p.e() ) )
174 {
175
176 // Adjust p
177 if ( dif_4p.v().mag() < 1*MeV )
178 {
179
180 nSecondaries += 1;
181 theResult.AddSecondary ( new G4DynamicParticle ( G4Gamma::Gamma() , dif_4p.v() ) );
182
183 }
184 else
185 {
186 //G4cout << "HP_DB Difference in dif_p is too large (>1MeV) to adjust, so that give up tuning" << G4endl;
187 }
188
189 }
190 else
191 {
192
193 // dif_p > dif_e
194 // at first momentum
195 // Move residual momentum
196
197 p4 = theResult.GetSecondary( ires )->GetParticle()->Get4Momentum();
198 theResult.GetSecondary( ires )->GetParticle()->SetMomentum( p4.v() + dif_4p.v() );
199 dif_4p = init_4p_lab - ( secs_4p_lab - p4 + theResult.GetSecondary( ires )->GetParticle()->Get4Momentum() );
200
201 //G4cout << "HP_DB new residual kinetic energy " << theResult.GetSecondary( ires )->GetParticle()->GetKineticEnergy() << G4endl;
202
203 }
204
205 G4double dif_e = dif_4p.e() - ( dif_4p.v() ).mag();
206 //G4cout << "HP_DB dif_e " << dif_e << G4endl;
207
208 if ( dif_e > 0 )
209 {
210
211// create 2 gamma
212
213 nSecondaries += 2;
214 G4double e1 = ( dif_4p.e() -dif_4p.v().mag() ) / 2;
215 G4double costh = 2.*G4UniformRand()-1.;
216 G4double phi = twopi*G4UniformRand();
217 G4ThreeVector dir( std::sin(std::acos(costh))*std::cos(phi),
218 std::sin(std::acos(costh))*std::sin(phi),
219 costh);
220 theResult.AddSecondary ( new G4DynamicParticle ( G4Gamma::Gamma() , e1*dir ) );
221 theResult.AddSecondary ( new G4DynamicParticle ( G4Gamma::Gamma() , -e1*dir ) );
222
223 }
224 else //dif_e < 0
225 {
226
227// At first reduce KE of the fastest secondary;
228 G4double ke0 = theResult.GetSecondary( ifast )->GetParticle()->GetKineticEnergy();
229 G4ThreeVector p0 = theResult.GetSecondary( ifast )->GetParticle()->GetMomentum();
230 G4ThreeVector dir = ( theResult.GetSecondary( ifast )->GetParticle()->GetMomentum() ).unit();
231
232 //G4cout << "HP_DB ifast " << ifast << " ke0 " << ke0 << G4endl;
233
234 if ( ke0 + dif_e > 0 )
235 {
236 theResult.GetSecondary( ifast )->GetParticle()->SetKineticEnergy( ke0 + dif_e );
237 G4ThreeVector dp = p0 - theResult.GetSecondary( ifast )->GetParticle()->GetMomentum();
238
239 G4ThreeVector p = theResult.GetSecondary( islow )->GetParticle()->GetMomentum();
240 //theResult.GetSecondary( islow )->GetParticle()->SetMomentum( p - dif_e*dir );
241 theResult.GetSecondary( islow )->GetParticle()->SetMomentum( p + dp );
242 }
243 else
244 {
245 //G4cout << "HP_DB Difference in dif_e too large ( <0MeV ) to adjust, so that give up tuning" << G4endl;
246 }
247
248 }
249
250}
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