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25 //
26 //
27 // FermiBreakUp de-excitation model
28 // by V. Ivanchenko (July 2016)
29 //
30
31 #include "G4FermiFragmentsPoolVI.hh"
32 #include "G4PhysicalConstants.hh"
33 #include "G4SystemOfUnits.hh"
34 #include "G4NuclearLevelData.hh"
35 #include "G4NucleiProperties.hh"
36 #include "G4LevelManager.hh"
37 #include "G4DeexPrecoParameters.hh"
38 #include "G4FermiBreakUpUtil.hh"
39 #include <iomanip>
40
41 G4FermiFragmentsPoolVI::G4FermiFragmentsPoolVI()
42 {}
43
44 G4FermiFragmentsPoolVI::~G4FermiFragmentsPoolVI()
45 {
46 for (G4int i=0; i<maxA; ++i) {
47 for (G4int j=0; j<maxZ; ++j) {
48 auto ptr = list_c[j][i];
49 if (nullptr != ptr) {
50 for ( auto const & p : *ptr) { delete p; }
51 delete ptr;
52 }
53 }
54 }
55 for (auto const & ptr : fragment_pool) { delete ptr; }
56 }
57
58 G4bool G4FermiFragmentsPoolVI::HasDecay(const G4int Z, const G4int A,
59 const G4double eexc) const
60 {
61 if (Z < maxZ && A < maxA && nullptr != list_c[Z][A]) {
62 for (auto const & ch : *(list_c[Z][A])) {
63 if (ch->GetExcitation() <= eexc + fTolerance && ch->NumberPairs() > 0) {
64 return true;
65 }
66 }
67 }
68 return false;
69 }
70
71 const G4FermiChannels*
72 G4FermiFragmentsPoolVI::ClosestChannels(G4int Z, G4int A, G4double etot) const
73 {
74 const G4FermiChannels* res = nullptr;
75 if (Z >= maxZ || A >= maxA) { return res; }
76
77 auto chan = list_c[Z][A];
78 if (nullptr == chan) { return res; }
79
80 G4double demax = 1.e+9;
81 for (auto const & ch : *chan) {
82 if (ch->NumberPairs() == 0) { continue; }
83 G4double de = etot - ch->GetFragment()->GetTotalEnergy();
84 // an excitation coincide with a level
85 if (std::abs(de) <= fTolerance) {
86 return ch;
87 }
88 if (de >= 0 && de < demax) {
89 demax = de;
90 res = ch;
91 }
92 }
93 return res;
94 }
95
96 G4bool G4FermiFragmentsPoolVI::IsInThePool(const G4int Z, const G4int A,
97 const G4double exc) const
98 {
99 for (auto const& fr : fragment_pool) {
100 if(fr->GetZ() == Z && fr->GetA() == A &&
101 std::abs(exc - fr->GetExcitationEnergy()) < fTolerance)
102 { return true; }
103 }
104 return false;
105 }
106
107 void G4FermiFragmentsPoolVI::Initialise()
108 {
109 if (isInitialized) { return; }
110 isInitialized = true;
111 G4DeexPrecoParameters* param =
112 G4NuclearLevelData::GetInstance()->GetParameters();
113 fTolerance = 2*CLHEP::eV;
114 fElim = param->GetFBUEnergyLimit();
115
116 fragment_pool.reserve(991);
117
118 // stable particles
119 fragment_pool.push_back(new G4FermiFragment(1, 0, 1, 0.0, DBL_MAX));
120 fragment_pool.push_back(new G4FermiFragment(1, 1, 1, 0.0, DBL_MAX));
121 fragment_pool.push_back(new G4FermiFragment(2, 1, 2, 0.0, DBL_MAX));
122 fragment_pool.push_back(new G4FermiFragment(3, 1, 1, 0.0, 3.8879e+08));
123 fragment_pool.push_back(new G4FermiFragment(3, 2, 1, 0.0, DBL_MAX));
124 fragment_pool.push_back(new G4FermiFragment(4, 2, 0, 0.0, DBL_MAX));
125 fragment_pool.push_back(new G4FermiFragment(5, 2, 3, 0.0, 7.0325e-22));
126 fragment_pool.push_back(new G4FermiFragment(5, 3, 3, 0.0, 3.70493e-22));
127
128 // use level data and construct the pool
129 G4NuclearLevelData* ndata = G4NuclearLevelData::GetInstance();
130 for (G4int Z=1; Z<maxZ; ++Z) {
131 G4int Amin = ndata->GetMinA(Z);
132 G4int Amax = std::min(maxA, ndata->GetMaxA(Z)+1);
133 for (G4int A=Amin; A<Amax; ++A) {
134 const G4LevelManager* man = ndata->GetLevelManager(Z, A);
135 if (nullptr != man) {
136 std::size_t nn = man->NumberOfTransitions();
137 for(std::size_t i=0; i<=nn; ++i) {
138 G4double exc = man->LevelEnergy(i);
139 /*
140 G4cout << "++ Z=" << Z << " A=" << A << " Eex=" << exc
141 << " time(ns)=" << man->LifeTime(i)/ns << " i=" << i
142 << " InPool=" << IsInThePool(Z, A, exc) << G4endl;
143 */
144 // only levels below limit are consided
145 if (exc >= fElim) { continue; }
146 // only new are considered
147 if (IsInThePool(Z, A, exc)) { continue; }
148 fragment_pool.push_back(new G4FermiFragment(A, Z, man->TwoSpinParity(i),
149 exc, man->LifeTime(i)));
150 }
151 }
152 }
153 }
154 G4int nfrag = (G4int)fragment_pool.size();
155 for (auto const& f : fragment_pool) {
156 G4int Z = f->GetZ();
157 G4int A = f->GetA();
158 if (list_c[Z][A] == nullptr) {
159 list_c[Z][A] = new std::vector<G4FermiChannels*>;
160 }
161 (list_c[Z][A])->push_back(new G4FermiChannels(f));
162 }
163
164 // list of fragment pairs ordered by A
165 for (G4int i=0; i<nfrag; ++i) {
166 const G4FermiFragment* f1 = fragment_pool[i];
167 G4int Z1 = f1->GetZ();
168 G4int A1 = f1->GetA();
169 G4double e1 = f1->GetTotalEnergy();
170 for (G4int j=0; j<nfrag; ++j) {
171 const G4FermiFragment* f2 = fragment_pool[j];
172 G4int Z2 = f2->GetZ();
173 G4int A2 = f2->GetA();
174 if(A2 < A1 || (A2 == A1 && Z2 < Z1)) { continue; }
175 G4int Z = Z1 + Z2;
176 G4int A = A1 + A2;
177
178 if(Z >= maxZ || A >= maxA) { continue; }
179
180 G4double e2 = f2->GetTotalEnergy();
181 G4double minE = e1 + e2;
182 G4double exc = minE - G4NucleiProperties::GetNuclearMass(A, Z);
183 /*
184 if(1 == Z) {
185 G4cout << "+!+ Z=" << Z << " A=" << A
186 << " Z1=" << Z1 << " A1=" << A1
187 << " Z2=" << Z2 << " A2=" << A2 << " Eex=" << exc
188 << " Qb=" << G4FermiBreakUpUtil::CoulombBarrier(Z1, A1, Z2, A2, exc)
189 << " e1=" << e1 << " e2=" << e2
190 << " M=" << G4NucleiProperties::GetNuclearMass(A, Z)
191 << G4endl;
192 }
193 */
194 // ignore very excited case
195 if (exc > fElim) { continue; }
196 auto chan = list_c[Z][A];
197 if (nullptr == chan) { continue; }
198 std::size_t kmax = chan->size();
199 for (std::size_t k=0; k<kmax; ++k) {
200 auto ch = (*chan)[k];
201 const G4double e0 = ch->GetMass();
202 auto f0 = ch->GetFragment();
203 if (e0 > minE && G4FermiBreakUpUtil::CheckSpinParity(f1, f2, f0)) {
204 const G4double cb =
205 G4FermiBreakUpUtil::CoulombBarrier(Z1, A1, Z2, A2, ch->GetExcitation());
206 if (e0 >= minE + cb) {
207 ch->AddChannel(new G4FermiPair(f1, f2));
208 }
209 }
210 }
211 }
212 }
213 // compute cumulative probabilities
214 for (G4int A=1; A<maxA; ++A) {
215 for (G4int Z=0; Z<maxZ; ++Z) {
216 auto chan = list_c[Z][A];
217 if(nullptr == chan) { continue; }
218 std::size_t kmax = chan->size();
219 for (std::size_t k=0; k<kmax; ++k) {
220 auto ch = (*chan)[k];
221 auto frag = ch->GetFragment();
222 std::size_t nch = ch->NumberPairs();
223 if (1 < nch) {
224 const std::vector<G4FermiPair*>& pairs = ch->GetChannels();
225 G4double ptot = 0.0;
226 for (std::size_t i=0; i<nch; ++i) {
227 ptot += G4FermiBreakUpUtil::Probability(frag->GetA(),
228 pairs[i]->GetFragment1(),
229 pairs[i]->GetFragment2(),
230 frag->GetTotalEnergy(),
231 frag->GetExcitationEnergy());
232 pairs[i]->SetProbability(ptot);
233 }
234 // normalisation
235 if (0.0 == ptot) {
236 pairs[0]->SetProbability(1.0);
237 } else {
238 ptot = 1./ptot;
239 for (std::size_t i=0; i<nch-1; ++i) {
240 G4double x = ptot*pairs[i]->Probability();
241 pairs[i]->SetProbability(x);
242 }
243 pairs[nch - 1]->SetProbability(1.0);
244 }
245 }
246 }
247 }
248 }
249 }
250
251 void G4FermiFragmentsPoolVI::DumpFragment(const G4FermiFragment* f) const
252 {
253 if (nullptr != f) {
254 G4long prec = G4cout.precision(6);
255 G4cout << " Z=" << f->GetZ() << " A=" << std::setw(2) << f->GetA()
256 << " Mass(GeV)=" << std::setw(8) << f->GetFragmentMass()/GeV
257 << " Eexc(MeV)=" << std::setw(7) << f->GetExcitationEnergy()
258 << " 2S=" << f->TwoSpinParity() << G4endl;
259 G4cout.precision(prec);
260 }
261 }
262
263 void G4FermiFragmentsPoolVI::Dump() const
264 {
265 G4cout <<"----------------------------------------------------------------"
266 <<G4endl;
267 G4cout << "##### List of Fragments in the Fermi Fragment Pool #####"
268 << G4endl;
269 std::size_t nfrag = fragment_pool.size();
270 G4cout << " Nfragnents=" << nfrag << " Elim(MeV)=" << fElim/CLHEP::MeV << G4endl;
271 for(std::size_t i=0; i<nfrag; ++i) {
272 DumpFragment(fragment_pool[i]);
273 }
274 G4cout << G4endl;
275
276
277 G4cout << "----------------------------------------------------------------"
278 << G4endl;
279 G4cout << "### G4FermiFragmentPoolVI: fragments sorted by A" << G4endl;
280
281 G4int ama{0};
282 G4long prec = G4cout.precision(6);
283 for (G4int A=1; A<maxA; ++A) {
284 for (G4int Z=0; Z<maxZ; ++Z) {
285 auto chan = list_c[Z][A];
286 if (nullptr == chan) { continue; }
287 std::size_t jmax = chan->size();
288 G4cout << " # A=" << A << " Z=" << Z << " Nfagments=" << jmax << G4endl;
289 for(std::size_t j=0; j<jmax; ++j) {
290 auto ch = (*chan)[j];
291 if(nullptr == ch) { continue; }
292 auto f = ch->GetFragment();
293 G4int a1 = f->GetA();
294 G4int z1 = f->GetZ();
295 std::size_t nch = ch->NumberPairs();
296 ama += nch;
297 G4cout << " ("<<a1<<","<<z1<<"); Eex(MeV)= "
298 << f->GetExcitationEnergy()
299 << " 2S=" << f->TwoSpinParity()
300 << "; Nchannels=" << nch
301 << G4endl;
302 for (std::size_t k=0; k<nch; ++k) {
303 auto fpair = ch->GetPair(k);
304 if(nullptr == fpair) { continue; }
305 G4cout << " (" << fpair->GetFragment1()->GetZ()
306 << ", " << fpair->GetFragment1()->GetA()
307 << ", " << fpair->GetFragment1()->GetExcitationEnergy()
308 << ") ("<< fpair->GetFragment2()->GetZ()
309 << ", " << fpair->GetFragment2()->GetA() << ", "
310 << fpair->GetFragment2()->GetExcitationEnergy()
311 << ") prob= " << fpair->Probability()
312 << G4endl;
313 }
314 }
315 }
316 }
317 G4cout.precision(prec);
318 G4cout << " ======== Total number of channels " << ama << " ======" << G4endl;
319 }
320
321