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25 // 22 //
26 // 23 //
27 // 24 //
28 // original by H.P. Wellisch << 25 // original by H.P. Wellisch
29 // modified by J.L. Chuma, TRIUMF, 19-Nov-1996 << 26 // modified by J.L. Chuma, TRIUMF, 19-Nov-1996
30 // last modified: 27-Mar-1997 << 27 // last modified: 27-Mar-1997
31 // J.P.Wellisch: 23-Apr-97: minor simplificati << 28 // J.P.Wellisch: 23-Apr-97: minor simplifications
32 // modified by J.L.Chuma 24-Jul-97 to set the << 29 // modified by J.L.Chuma 24-Jul-97 to set the total momentum in Cinema and
33 // Evaporatio << 30 // EvaporationEffects
34 // modified by J.L.Chuma 21-Oct-97 put std::a << 31 // modified by J.L.Chuma 21-Oct-97 put abs() around the totalE^2-mass^2
35 // in calcula << 32 // in calculation of total momentum in
36 // Cinema and << 33 // Cinema and EvaporationEffects
37 // Chr. Volcker, 10-Nov-1997: new methods and << 34 // Chr. Volcker, 10-Nov-1997: new methods and class variables.
38 // HPW added utilities for low energy neutron << 35 // HPW added utilities for low energy neutron transport. (12.04.1998)
39 // M.G. Pia, 2 Oct 1998: modified GetFermiMome << 36 // M.G. Pia, 2 Oct 1998: modified GetFermiMomentum to avoid memory leaks
40 // G.Folger, spring 2010: add integer A/Z int <<
41 // A. Ribon, summer 2015: migrated to G4Exp a <<
42 // A. Ribon, autumn 2021: extended to hypernu <<
43 37
44 #include "G4Nucleus.hh" 38 #include "G4Nucleus.hh"
45 #include "G4NucleiProperties.hh" <<
46 #include "G4PhysicalConstants.hh" <<
47 #include "G4SystemOfUnits.hh" <<
48 #include "Randomize.hh" 39 #include "Randomize.hh"
49 #include "G4HadronicException.hh" 40 #include "G4HadronicException.hh"
50 #include "G4Exp.hh" << 41
51 #include "G4Log.hh" <<
52 #include "G4HyperNucleiProperties.hh" <<
53 #include "G4HadronicParameters.hh" <<
54 <<
55 <<
56 G4Nucleus::G4Nucleus() 42 G4Nucleus::G4Nucleus()
57 : theA(0), theZ(0), theL(0), aEff(0.0), zEff <<
58 { <<
59 pnBlackTrackEnergy = 0.0; <<
60 dtaBlackTrackEnergy = 0.0; <<
61 pnBlackTrackEnergyfromAnnihilation = 0.0; <<
62 dtaBlackTrackEnergyfromAnnihilation = 0.0; <<
63 excitationEnergy = 0.0; <<
64 momentum = G4ThreeVector(0.,0.,0.); <<
65 fermiMomentum = 1.52*hbarc/fermi; <<
66 theTemp = 293.16*kelvin; <<
67 fIsotope = 0; <<
68 } <<
69 <<
70 G4Nucleus::G4Nucleus( const G4double A, const <<
71 { 43 {
72 SetParameters( A, Z, std::max(numberOfLambda << 44 pnBlackTrackEnergy = dtaBlackTrackEnergy = 0.0;
73 pnBlackTrackEnergy = 0.0; <<
74 dtaBlackTrackEnergy = 0.0; <<
75 pnBlackTrackEnergyfromAnnihilation = 0.0; <<
76 dtaBlackTrackEnergyfromAnnihilation = 0.0; <<
77 excitationEnergy = 0.0; 45 excitationEnergy = 0.0;
78 momentum = G4ThreeVector(0.,0.,0.); 46 momentum = G4ThreeVector(0.,0.,0.);
79 fermiMomentum = 1.52*hbarc/fermi; 47 fermiMomentum = 1.52*hbarc/fermi;
80 theTemp = 293.16*kelvin; 48 theTemp = 293.16*kelvin;
81 fIsotope = 0; <<
82 } 49 }
83 50
84 G4Nucleus::G4Nucleus( const G4int A, const G4i << 51 G4Nucleus::G4Nucleus( const G4double A, const G4double Z )
85 { 52 {
86 SetParameters( A, Z, std::max(numberOfLambda << 53 SetParameters( A, Z );
87 pnBlackTrackEnergy = 0.0; << 54 pnBlackTrackEnergy = dtaBlackTrackEnergy = 0.0;
88 dtaBlackTrackEnergy = 0.0; <<
89 pnBlackTrackEnergyfromAnnihilation = 0.0; <<
90 dtaBlackTrackEnergyfromAnnihilation = 0.0; <<
91 excitationEnergy = 0.0; 55 excitationEnergy = 0.0;
92 momentum = G4ThreeVector(0.,0.,0.); 56 momentum = G4ThreeVector(0.,0.,0.);
93 fermiMomentum = 1.52*hbarc/fermi; 57 fermiMomentum = 1.52*hbarc/fermi;
94 theTemp = 293.16*kelvin; 58 theTemp = 293.16*kelvin;
95 fIsotope = 0; <<
96 } 59 }
97 60
98 G4Nucleus::G4Nucleus( const G4Material *aMater 61 G4Nucleus::G4Nucleus( const G4Material *aMaterial )
99 { 62 {
100 ChooseParameters( aMaterial ); 63 ChooseParameters( aMaterial );
101 pnBlackTrackEnergy = 0.0; << 64 pnBlackTrackEnergy = dtaBlackTrackEnergy = 0.0;
102 dtaBlackTrackEnergy = 0.0; <<
103 pnBlackTrackEnergyfromAnnihilation = 0.0; <<
104 dtaBlackTrackEnergyfromAnnihilation = 0.0; <<
105 excitationEnergy = 0.0; 65 excitationEnergy = 0.0;
106 momentum = G4ThreeVector(0.,0.,0.); 66 momentum = G4ThreeVector(0.,0.,0.);
107 fermiMomentum = 1.52*hbarc/fermi; 67 fermiMomentum = 1.52*hbarc/fermi;
108 theTemp = aMaterial->GetTemperature(); 68 theTemp = aMaterial->GetTemperature();
109 fIsotope = 0; <<
110 } 69 }
111 70
112 G4Nucleus::~G4Nucleus() {} 71 G4Nucleus::~G4Nucleus() {}
113 72
114 << 73 G4ReactionProduct G4Nucleus::
115 //-------------------------------------------- << 74 GetBiasedThermalNucleus(G4double aMass, G4ThreeVector aVelocity, G4double temp) const
116 // SVT (Sampling of the Velocity of the Target <<
117 //-------------------------------------------- <<
118 G4ReactionProduct <<
119 G4Nucleus::GetBiasedThermalNucleus(G4double aM <<
120 { 75 {
121 // If E_neutron <= E_threshold, Then apply t << 76 G4double velMag = aVelocity.mag();
122 // Else consider the target nucleus being wi <<
123 G4double E_threshold = G4HadronicParameters: <<
124 if ( E_threshold == -1. ) { <<
125 E_threshold = 400.0*8.617333262E-11*temp; <<
126 } <<
127 G4double E_neutron = 0.5*aVelocity.mag2()*G4 <<
128 <<
129 G4ReactionProduct result; 77 G4ReactionProduct result;
130 result.SetMass(aMass*G4Neutron::Neutron()->G << 78 G4double value = 0;
131 << 79 G4double random = 1;
132 if ( E_neutron <= E_threshold ) { << 80 G4double norm = 3.*sqrt(k_Boltzmann*temp*aMass*G4Neutron::Neutron()->GetPDGMass());
133 << 81 norm /= G4Neutron::Neutron()->GetPDGMass();
134 // Beta = sqrt(m/2kT) << 82 norm *= 5.;
135 G4double beta = std::sqrt(result.GetMass() << 83 norm += velMag;
136 << 84 norm /= velMag;
137 // Neutron speed vn << 85 while(value/norm<random)
138 G4double vN_norm = aVelocity.mag(); << 86 {
139 G4double vN_norm2 = vN_norm*vN_norm; << 87 result = GetThermalNucleus(aMass, temp);
140 G4double y = beta*vN_norm; << 88 G4ThreeVector targetVelocity = 1./result.GetMass()*result.GetMomentum();
141 << 89 value = (targetVelocity+aVelocity).mag()/velMag;
142 // Normalize neutron velocity << 90 random = G4UniformRand();
143 aVelocity = (1./vN_norm)*aVelocity; <<
144 <<
145 // Sample target speed <<
146 G4double x2; <<
147 G4double randThreshold; <<
148 G4double vT_norm, vT_norm2, mu; //theta, v <<
149 G4double acceptThreshold; <<
150 G4double vRelativeSpeed; <<
151 G4double cdf0 = 2./(2.+std::sqrt(CLHEP::pi <<
152 <<
153 do { <<
154 // Sample the target velocity vT in the <<
155 if ( G4UniformRand() < cdf0 ) { <<
156 // Sample in C45 from https://laws.lan <<
157 x2 = -std::log(G4UniformRand()*G4Unifo <<
158 } else { <<
159 // Sample in C61 from https://laws.lan <<
160 G4double ampl = std::cos(CLHEP::pi/2.0 <<
161 x2 = -std::log(G4UniformRand()) - std: <<
162 } <<
163 <<
164 vT_norm = std::sqrt(x2)/beta; <<
165 vT_norm2 = vT_norm*vT_norm; <<
166 <<
167 // Sample cosine between the incident ne <<
168 mu = 2*G4UniformRand() - 1; <<
169 <<
170 // Define acceptance threshold <<
171 vRelativeSpeed = std::sqrt(vN_norm2 + vT <<
172 acceptThreshold = vRelativeSpeed/(vN_nor <<
173 randThreshold = G4UniformRand(); <<
174 } while ( randThreshold >= acceptThreshold <<
175 <<
176 DoKinematicsOfThermalNucleus(mu, vT_norm, <<
177 <<
178 } else { // target nucleus considered as bei <<
179 <<
180 result.SetMomentum(0., 0., 0.); <<
181 result.SetKineticEnergy(0.); <<
182 <<
183 } 91 }
184 <<
185 return result; 92 return result;
186 } 93 }
187 94
188 << 95 G4ReactionProduct G4Nucleus::GetThermalNucleus(G4double targetMass, G4double temp) const
189 void << 96 {
190 G4Nucleus::DoKinematicsOfThermalNucleus(const << 97 G4double currentTemp = temp;
191 G4Reac << 98 if(currentTemp < 0) currentTemp = theTemp;
192 << 99 G4ReactionProduct theTarget;
193 // Get target nucleus direction from the neu << 100 theTarget.SetMass(targetMass*G4Neutron::Neutron()->GetPDGMass());
194 G4double cosTh = mu; << 101 G4double px, py, pz;
195 G4ThreeVector uNorm = aVelocity; << 102 px = GetThermalPz(theTarget.GetMass(), currentTemp);
196 << 103 py = GetThermalPz(theTarget.GetMass(), currentTemp);
197 G4double sinTh = std::sqrt(1. - cosTh*cosTh) << 104 pz = GetThermalPz(theTarget.GetMass(), currentTemp);
198 << 105 theTarget.SetMomentum(px, py, pz);
199 // Sample randomly the phi angle between the << 106 G4double tMom = sqrt(px*px+py*py+pz*pz);
200 G4double phi = CLHEP::twopi*G4UniformRand(); << 107 G4double tEtot = sqrt((tMom+theTarget.GetMass())*
201 G4double sinPhi = std::sin(phi); << 108 (tMom+theTarget.GetMass())-
202 G4double cosPhi = std::cos(phi); << 109 2.*tMom*theTarget.GetMass());
203 << 110 if(1-tEtot/theTarget.GetMass()>0.001)
204 // Find orthogonal vector to aVelocity - sol << 111 {
205 G4ThreeVector ortho(1., 1., 1.); << 112 theTarget.SetTotalEnergy(tEtot);
206 if ( uNorm[0] ) ortho[0] = -(uNorm[1]+ << 113 }
207 else if ( uNorm[1] ) ortho[1] = -(uNorm[0]+ << 114 else
208 else if ( uNorm[2] ) ortho[2] = -(uNorm[0]+ << 115 {
209 << 116 theTarget.SetKineticEnergy(tMom*tMom/(2.*theTarget.GetMass()));
210 // Normalize the vector << 117 }
211 ortho = (1/ortho.mag())*ortho; << 118 return theTarget;
212 <<
213 // Find vector to draw a plan perpendicular <<
214 G4ThreeVector orthoComp( uNorm[1]*ortho[2] - <<
215 uNorm[2]*ortho[0] - <<
216 uNorm[0]*ortho[1] - <<
217 <<
218 // Find the direction of the target velocity <<
219 G4ThreeVector directionTarget( cosTh*uNorm[0 <<
220 cosTh*uNorm[1 <<
221 cosTh*uNorm[2 <<
222 <<
223 // Normalize directionTarget <<
224 directionTarget = ( 1./directionTarget.mag() <<
225 <<
226 // Set momentum <<
227 G4double px = result.GetMass()*vT_norm*direc <<
228 G4double py = result.GetMass()*vT_norm*direc <<
229 G4double pz = result.GetMass()*vT_norm*direc <<
230 result.SetMomentum(px, py, pz); <<
231 <<
232 G4double tMom = std::sqrt(px*px+py*py+pz*pz) <<
233 G4double tEtot = std::sqrt( (tMom+result.Get <<
234 - 2.*tMom*result.GetMass() <<
235 <<
236 if ( tEtot/result.GetMass() - 1. > 0.001 ) { <<
237 // use relativistic energy for higher ener <<
238 result.SetTotalEnergy(tEtot); <<
239 } else { <<
240 // use p**2/2M for lower energies (to pres <<
241 result.SetKineticEnergy(tMom*tMom/(2.*resu <<
242 } 119 }
243 <<
244 } <<
245 <<
246 <<
247 G4ReactionProduct <<
248 G4Nucleus::GetThermalNucleus(G4double targetMa <<
249 { <<
250 G4double currentTemp = temp; <<
251 if (currentTemp < 0) currentTemp = theTemp; <<
252 G4ReactionProduct theTarget; <<
253 theTarget.SetMass(targetMass*G4Neutron::Neut <<
254 G4double px, py, pz; <<
255 px = GetThermalPz(theTarget.GetMass(), curre <<
256 py = GetThermalPz(theTarget.GetMass(), curre <<
257 pz = GetThermalPz(theTarget.GetMass(), curre <<
258 theTarget.SetMomentum(px, py, pz); <<
259 G4double tMom = std::sqrt(px*px+py*py+pz*pz) <<
260 G4double tEtot = std::sqrt((tMom+theTarget.G <<
261 (tMom+theTarget.G <<
262 2.*tMom*theTarge <<
263 // if(1-tEtot/theTarget.GetMass()>0.001) t <<
264 if (tEtot/theTarget.GetMass() - 1. > 0.001) <<
265 // use relativistic energy for higher ener <<
266 theTarget.SetTotalEnergy(tEtot); <<
267 <<
268 } else { <<
269 // use p**2/2M for lower energies (to pres <<
270 theTarget.SetKineticEnergy(tMom*tMom/(2.*t <<
271 } <<
272 return theTarget; <<
273 } <<
274 <<
275 120
276 void << 121 void
277 G4Nucleus::ChooseParameters(const G4Material* << 122 G4Nucleus::ChooseParameters( const G4Material *aMaterial )
278 { << 123 {
279 G4double random = G4UniformRand(); << 124 G4double random = G4UniformRand();
280 G4double sum = aMaterial->GetTotNbOfAtomsPer << 125 G4double sum = 0;
281 const G4ElementVector* theElementVector = aM << 126 const G4ElementVector *theElementVector = aMaterial->GetElementVector();
282 G4double running(0); << 127 unsigned int i;
283 // G4Element* element(0); << 128 for(i=0; i<aMaterial->GetNumberOfElements(); ++i )
284 const G4Element* element = (*theElementVecto << 129 {
285 << 130 sum += aMaterial->GetAtomicNumDensityVector()[i];
286 for (unsigned int i = 0; i < aMaterial->GetN << 131 }
287 running += aMaterial->GetVecNbOfAtomsPerVo << 132 G4double running = 0;
288 if (running > random*sum) { << 133 for(i=0; i<aMaterial->GetNumberOfElements(); ++i )
289 element = (*theElementVector)[i]; << 134 {
290 break; << 135 running += aMaterial->GetAtomicNumDensityVector()[i];
>> 136 if( running/sum > random ) {
>> 137 aEff = (*theElementVector)[i]->GetA()*mole/g;
>> 138 zEff = (*theElementVector)[i]->GetZ();
>> 139 break;
>> 140 }
291 } 141 }
292 } 142 }
293 << 143
294 if (element->GetNumberOfIsotopes() > 0) { << 144 void
295 G4double randomAbundance = G4UniformRand() << 145 G4Nucleus::SetParameters( const G4double A, const G4double Z )
296 G4double sumAbundance = element->GetRelati << 146 {
297 unsigned int iso=0; << 147 G4int myZ = G4int(Z + 0.5);
298 while (iso < element->GetNumberOfIsotopes( << 148 G4int myA = G4int(A + 0.5);
299 sumAbundance < randomAbundance) { << 149 if( myA<1 || myZ<0 || myZ>myA )
300 ++iso; <<
301 sumAbundance += element->GetRelativeAbun <<
302 } <<
303 theA=element->GetIsotope(iso)->GetN(); <<
304 theZ=element->GetIsotope(iso)->GetZ(); <<
305 theL=0; <<
306 aEff=theA; <<
307 zEff=theZ; <<
308 } else { <<
309 aEff = element->GetN(); <<
310 zEff = element->GetZ(); <<
311 theZ = G4int(zEff + 0.5); <<
312 theA = G4int(aEff + 0.5); <<
313 theL=0; <<
314 } <<
315 } <<
316 <<
317 <<
318 void <<
319 G4Nucleus::SetParameters( const G4double A, co <<
320 { <<
321 theZ = G4lrint(Z); <<
322 theA = G4lrint(A); <<
323 theL = std::max(numberOfLambdas, 0); <<
324 if (theA<1 || theZ<0 || theZ>theA) { <<
325 throw G4HadronicException(__FILE__, __LINE <<
326 "G4Nucleus::SetParameters called w <<
327 } <<
328 aEff = A; // atomic weight <<
329 zEff = Z; // atomic number <<
330 fIsotope = 0; <<
331 } <<
332 <<
333 <<
334 void <<
335 G4Nucleus::SetParameters( const G4int A, const <<
336 { <<
337 theZ = Z; <<
338 theA = A; <<
339 theL = std::max(numberOfLambdas, 0); <<
340 if( theA<1 || theZ<0 || theZ>theA ) <<
341 { 150 {
342 throw G4HadronicException(__FILE__, __LI 151 throw G4HadronicException(__FILE__, __LINE__,
343 "G4Nucleus::SetParameters called with << 152 "G4Nucleus::SetParameters called with non-physical parameters");
344 } 153 }
345 aEff = A; // atomic weight << 154 aEff = A; // atomic weight
346 zEff = Z; // atomic number << 155 zEff = Z; // atomic number
347 fIsotope = 0; <<
348 } <<
349 <<
350 <<
351 G4DynamicParticle * <<
352 G4Nucleus::ReturnTargetParticle() const <<
353 { <<
354 // choose a proton or a neutron (or a lamba <<
355 G4DynamicParticle *targetParticle = new G4Dy <<
356 const G4double rnd = G4UniformRand(); <<
357 if ( rnd < zEff/aEff ) { <<
358 targetParticle->SetDefinition( G4Proton::P <<
359 } else if ( rnd < (zEff + theL*1.0)/aEff ) { <<
360 targetParticle->SetDefinition( G4Lambda::L <<
361 } else { <<
362 targetParticle->SetDefinition( G4Neutron:: <<
363 } 156 }
364 return targetParticle; <<
365 } <<
366 157
367 << 158 G4DynamicParticle *
368 G4double << 159 G4Nucleus::ReturnTargetParticle() const
369 G4Nucleus::AtomicMass( const G4double A, const << 160 {
370 { << 161 // choose a proton or a neutron as the target particle
371 // Now returns (atomic mass - electron masse << 162
372 if ( numberOfLambdas > 0 ) { << 163 G4DynamicParticle *targetParticle = new G4DynamicParticle;
373 return G4HyperNucleiProperties::GetNuclear << 164 if( G4UniformRand() < zEff/aEff )
374 } else { << 165 targetParticle->SetDefinition( G4Proton::Proton() );
375 return G4NucleiProperties::GetNuclearMass( << 166 else
>> 167 targetParticle->SetDefinition( G4Neutron::Neutron() );
>> 168 return targetParticle;
376 } 169 }
377 } <<
378 <<
379 170
380 G4double << 171 G4double
381 G4Nucleus::AtomicMass( const G4int A, const G4 << 172 G4Nucleus::AtomicMass( const G4double A, const G4double Z ) const
382 { << 173 {
383 // Now returns (atomic mass - electron masse << 174 // derived from original FORTRAN code ATOMAS by H. Fesefeldt (2-Dec-1986)
384 if ( numberOfLambdas > 0 ) { << 175 //
385 return G4HyperNucleiProperties::GetNuclear << 176 // Computes atomic mass in MeV
386 } else { << 177 // units for A example: A = material->GetA()/(g/mole);
387 return G4NucleiProperties::GetNuclearMass( << 178 //
>> 179 // Note: can't just use aEff and zEff since the Nuclear Reaction
>> 180 // function needs to calculate atomic mass for various values of A and Z
>> 181
>> 182 const G4double electron_mass = G4Electron::Electron()->GetPDGMass()/MeV;
>> 183 const G4double proton_mass = G4Proton::Proton()->GetPDGMass()/MeV;
>> 184 const G4double neutron_mass = G4Neutron::Neutron()->GetPDGMass()/MeV;
>> 185 const G4double deuteron_mass = G4Deuteron::Deuteron()->GetPDGMass()/MeV;
>> 186 const G4double alpha_mass = G4Alpha::Alpha()->GetPDGMass()/MeV;
>> 187
>> 188 G4int myZ = G4int(Z + 0.5);
>> 189 G4int myA = G4int(A + 0.5);
>> 190 if( myA <= 0 )return DBL_MAX;
>> 191 if( myZ > myA)return DBL_MAX;
>> 192 if( myA == 1 )
>> 193 {
>> 194 if( myZ == 0 )return neutron_mass*MeV;
>> 195 if( myZ == 1 )return proton_mass*MeV + electron_mass*MeV; // hydrogen
>> 196 }
>> 197 else if( myA == 2 && myZ == 1 )
>> 198 {
>> 199 return deuteron_mass*MeV;
>> 200 }
>> 201 else if( myA == 4 && myZ == 2 )
>> 202 {
>> 203 return alpha_mass*MeV;
>> 204 }
>> 205 //
>> 206 // Weitzsaecker's Mass formula
>> 207 //
>> 208 G4double mass =
>> 209 (A-Z)*neutron_mass + Z*proton_mass + Z*electron_mass
>> 210 - 15.67*A // nuclear volume
>> 211 + 17.23*pow(A,2./3.) // surface energy
>> 212 + 93.15*pow(A/2.-Z,2.)/A // asymmetry
>> 213 + 0.6984523*pow(Z,2.)*pow(A,-1./3.); // coulomb
>> 214 G4int ipp = (myA - myZ)%2; // pairing
>> 215 G4int izz = myZ%2;
>> 216 if( ipp == izz )mass += (ipp+izz-1) * 12.0 * pow(A,-0.5);
>> 217 return mass*MeV;
388 } 218 }
389 } <<
390 <<
391 <<
392 G4double <<
393 G4Nucleus::GetThermalPz( const G4double mass, <<
394 { <<
395 G4double result = G4RandGauss::shoot(); <<
396 result *= std::sqrt(k_Boltzmann*temp*mass); <<
397 // ni <<
398 // Ma <<
399 return result; <<
400 } <<
401 219
402 << 220 G4double
403 G4double << 221 G4Nucleus::GetThermalPz( const G4double mass, const G4double temp ) const
404 G4Nucleus::EvaporationEffects( G4double kineti << 222 {
405 { << 223 G4double result = G4RandGauss::shoot();
406 // derived from original FORTRAN code EXNU b << 224 result *= sqrt(k_Boltzmann*temp*mass); // Das ist impuls (Pz),
407 // << 225 // nichtrelativistische rechnung
408 // Nuclear evaporation as function of atomic << 226 // Maxwell verteilung angenommen
409 // and kinetic energy (MeV) of primary parti << 227 return result;
410 // <<
411 // returns kinetic energy (MeV) <<
412 // <<
413 if( aEff < 1.5 ) <<
414 { <<
415 pnBlackTrackEnergy = dtaBlackTrackEnergy = <<
416 return 0.0; <<
417 } <<
418 G4double ek = kineticEnergy/GeV; <<
419 G4float ekin = std::min( 4.0, std::max( 0.1, <<
420 const G4float atno = std::min( 120., aEff ); <<
421 const G4float gfa = 2.0*((aEff-1.0)/70.)*G4E <<
422 // <<
423 // 0.35 value at 1 GeV <<
424 // 0.05 value at 0.1 GeV <<
425 // <<
426 G4float cfa = std::max( 0.15, 0.35 + ((0.35- <<
427 G4float exnu = 7.716 * cfa * G4Exp(-cfa) <<
428 * ((atno-1.0)/120.)*G4Exp(-(atno-1.0)/120. <<
429 G4float fpdiv = std::max( 0.5, 1.0-0.25*ekin <<
430 // <<
431 // pnBlackTrackEnergy is the kinetic energy <<
432 // proton/neutron black <<
433 // dtaBlackTrackEnergy is the kinetic energy <<
434 // deuteron/triton/alpha <<
435 // <<
436 pnBlackTrackEnergy = exnu*fpdiv; <<
437 dtaBlackTrackEnergy = exnu*(1.0-fpdiv); <<
438 <<
439 if( G4int(zEff+0.1) != 82 ) <<
440 { <<
441 G4double ran1 = -6.0; <<
442 G4double ran2 = -6.0; <<
443 for( G4int i=0; i<12; ++i ) <<
444 { <<
445 ran1 += G4UniformRand(); <<
446 ran2 += G4UniformRand(); <<
447 } <<
448 pnBlackTrackEnergy *= 1.0 + ran1*gfa; <<
449 dtaBlackTrackEnergy *= 1.0 + ran2*gfa; <<
450 } <<
451 pnBlackTrackEnergy = std::max( 0.0, pnBlackT <<
452 dtaBlackTrackEnergy = std::max( 0.0, dtaBlac <<
453 while( pnBlackTrackEnergy+dtaBlackTrackEnerg <<
454 { <<
455 pnBlackTrackEnergy *= 1.0 - 0.5*G4UniformR <<
456 dtaBlackTrackEnergy *= 1.0 - 0.5*G4Uniform <<
457 } <<
458 //G4cout << "EvaporationEffects "<<kineticEn <<
459 // <<pnBlackTrackEnergy+dtaBlackTrackE <<
460 return (pnBlackTrackEnergy+dtaBlackTrackEner <<
461 } <<
462 <<
463 <<
464 G4double <<
465 G4Nucleus::AnnihilationEvaporationEffects(G4do <<
466 { <<
467 // Nuclear evaporation as a function of atom <<
468 // energy (MeV) of primary particle. Modifi <<
469 // <<
470 if( aEff < 1.5 || ekOrg < 0.) <<
471 { <<
472 pnBlackTrackEnergyfromAnnihilation = 0.0; <<
473 dtaBlackTrackEnergyfromAnnihilation = 0.0; <<
474 return 0.0; <<
475 } <<
476 G4double ek = kineticEnergy/GeV; <<
477 G4float ekin = std::min( 4.0, std::max( 0.1, <<
478 const G4float atno = std::min( 120., aEff ); <<
479 const G4float gfa = 2.0*((aEff-1.0)/70.)*G4E <<
480 <<
481 G4float cfa = std::max( 0.15, 0.35 + ((0.35- <<
482 G4float exnu = 7.716 * cfa * G4Exp(-cfa) <<
483 * ((atno-1.0)/120.)*G4Exp(-(atno-1.0)/120. <<
484 G4float fpdiv = std::max( 0.5, 1.0-0.25*ekin <<
485 <<
486 pnBlackTrackEnergyfromAnnihilation = exnu*fp <<
487 dtaBlackTrackEnergyfromAnnihilation = exnu*( <<
488 <<
489 G4double ran1 = -6.0; <<
490 G4double ran2 = -6.0; <<
491 for( G4int i=0; i<12; ++i ) { <<
492 ran1 += G4UniformRand(); <<
493 ran2 += G4UniformRand(); <<
494 } 228 }
495 pnBlackTrackEnergyfromAnnihilation *= 1.0 + << 229
496 dtaBlackTrackEnergyfromAnnihilation *= 1.0 + << 230 G4double
497 << 231 G4Nucleus::EvaporationEffects( G4double kineticEnergy )
498 pnBlackTrackEnergyfromAnnihilation = std::ma << 232 {
499 dtaBlackTrackEnergyfromAnnihilation = std::m << 233 // derived from original FORTRAN code EXNU by H. Fesefeldt (10-Dec-1986)
500 G4double blackSum = pnBlackTrackEnergyfromAn << 234 //
501 if (blackSum >= ekOrg/GeV) { << 235 // Nuclear evaporation as function of atomic number
502 pnBlackTrackEnergyfromAnnihilation *= ekOr << 236 // and kinetic energy (MeV) of primary particle
503 dtaBlackTrackEnergyfromAnnihilation *= ekO << 237 //
>> 238 // returns kinetic energy (MeV)
>> 239 //
>> 240 if( aEff < 1.5 )
>> 241 {
>> 242 pnBlackTrackEnergy = dtaBlackTrackEnergy = 0.0;
>> 243 return 0.0;
>> 244 }
>> 245 G4double ek = kineticEnergy/GeV;
>> 246 G4float ekin = std::min( 4.0, std::max( 0.1, ek ) );
>> 247 const G4float atno = std::min( 120., aEff );
>> 248 const G4float gfa = 2.0*((aEff-1.0)/70.)*exp(-(aEff-1.0)/70.);
>> 249 //
>> 250 // 0.35 value at 1 GeV
>> 251 // 0.05 value at 0.1 GeV
>> 252 //
>> 253 G4float cfa = std::max( 0.15, 0.35 + ((0.35-0.05)/2.3)*log(ekin) );
>> 254 G4float exnu = 7.716 * cfa * exp(-cfa)
>> 255 * ((atno-1.0)/120.)*exp(-(atno-1.0)/120.);
>> 256 G4float fpdiv = std::max( 0.5, 1.0-0.25*ekin*ekin );
>> 257 //
>> 258 // pnBlackTrackEnergy is the kinetic energy (in GeV) available for
>> 259 // proton/neutron black track particles
>> 260 // dtaBlackTrackEnergy is the kinetic energy (in GeV) available for
>> 261 // deuteron/triton/alpha black track particles
>> 262 //
>> 263 pnBlackTrackEnergy = exnu*fpdiv;
>> 264 dtaBlackTrackEnergy = exnu*(1.0-fpdiv);
>> 265
>> 266 if( G4int(zEff+0.1) != 82 )
>> 267 {
>> 268 //G4double ran1 = G4RandGauss::shoot();
>> 269 //G4double ran2 = G4RandGauss::shoot();
>> 270 G4double ran1 = -6.0;
>> 271 G4double ran2 = -6.0;
>> 272 for( G4int i=0; i<12; ++i )
>> 273 {
>> 274 ran1 += G4UniformRand();
>> 275 ran2 += G4UniformRand();
>> 276 }
>> 277 pnBlackTrackEnergy *= 1.0 + ran1*gfa;
>> 278 dtaBlackTrackEnergy *= 1.0 + ran2*gfa;
>> 279 }
>> 280 pnBlackTrackEnergy = std::max( 0.0, pnBlackTrackEnergy );
>> 281 dtaBlackTrackEnergy = std::max( 0.0, dtaBlackTrackEnergy );
>> 282 while( pnBlackTrackEnergy+dtaBlackTrackEnergy >= ek )
>> 283 {
>> 284 pnBlackTrackEnergy *= 1.0 - 0.5*G4UniformRand();
>> 285 dtaBlackTrackEnergy *= 1.0 - 0.5*G4UniformRand();
>> 286 }
>> 287 // G4cout << "EvaporationEffects "<<kineticEnergy<<" "
>> 288 // <<pnBlackTrackEnergy+dtaBlackTrackEnergy<<endl;
>> 289 return (pnBlackTrackEnergy+dtaBlackTrackEnergy)*GeV;
504 } 290 }
505 <<
506 return (pnBlackTrackEnergyfromAnnihilation+d <<
507 } <<
508 <<
509 291
510 G4double << 292 G4double
511 G4Nucleus::Cinema( G4double kineticEnergy ) << 293 G4Nucleus::Cinema( G4double kineticEnergy )
512 { << 294 {
513 // derived from original FORTRAN code CINEMA << 295 // derived from original FORTRAN code CINEMA by H. Fesefeldt (14-Oct-1987)
514 // << 296 //
515 // input: kineticEnergy (MeV) << 297 // input: kineticEnergy (MeV)
516 // returns modified kinetic energy (MeV) << 298 // returns modified kinetic energy (MeV)
517 // << 299 //
518 static const G4double expxu = 82.; << 300 static const G4double expxu = 82.; // upper bound for arg. of exp
519 static const G4double expxl = -expxu; << 301 static const G4double expxl = -expxu; // lower bound for arg. of exp
520 << 302
521 G4double ek = kineticEnergy/GeV; << 303 G4double ek = kineticEnergy/GeV;
522 G4double ekLog = G4Log( ek ); << 304 G4double ekLog = log( ek );
523 G4double aLog = G4Log( aEff ); << 305 G4double aLog = log( aEff );
524 G4double em = std::min( 1.0, 0.2390 + 0.0408 << 306 G4double em = std::min( 1.0, 0.2390 + 0.0408*aLog*aLog );
525 G4double temp1 = -ek * std::min( 0.15, 0.001 << 307 G4double temp1 = -ek * std::min( 0.15, 0.0019*aLog*aLog*aLog );
526 G4double temp2 = G4Exp( std::max( expxl, std << 308 G4double temp2 = exp( std::max( expxl, std::min( expxu, -(ekLog-em)*(ekLog-em)*2.0 ) ) );
527 G4double result = 0.0; << 309 G4double result = 0.0;
528 if( std::abs( temp1 ) < 1.0 ) << 310 if( abs( temp1 ) < 1.0 )
529 { << 311 {
530 if( temp2 > 1.0e-10 )result = temp1*temp2; << 312 if( temp2 > 1.0e-10 )result = temp1*temp2;
531 } << 313 }
532 else result = temp1*temp2; << 314 else result = temp1*temp2;
533 if( result < -ek )result = -ek; << 315 if( result < -ek )result = -ek;
534 return result*GeV; << 316 return result*GeV;
535 } << 317 }
536 318
>> 319 //
>> 320 // methods for class G4Nucleus ... by Christian Volcker
>> 321 //
537 322
538 G4ThreeVector G4Nucleus::GetFermiMomentum() << 323 G4ThreeVector G4Nucleus::GetFermiMomentum()
539 { << 324 {
540 // chv: .. we assume zero temperature! << 325 // chv: .. we assume zero temperature!
541 << 326
542 // momentum is equally distributed in each p << 327 // momentum is equally distributed in each phasespace volume dpx, dpy, dpz.
543 G4double ranflat1= << 328 G4double ranflat1=RandFlat::shoot((HepDouble)0.,(HepDouble)fermiMomentum);
544 G4RandFlat::shoot((G4double)0.,(G4double)f << 329 G4double ranflat2=RandFlat::shoot((HepDouble)0.,(HepDouble)fermiMomentum);
545 G4double ranflat2= << 330 G4double ranflat3=RandFlat::shoot((HepDouble)0.,(HepDouble)fermiMomentum);
546 G4RandFlat::shoot((G4double)0.,(G4double)f << 331 G4double ranmax = (ranflat1>ranflat2? ranflat1: ranflat2);
547 G4double ranflat3= << 332 ranmax = (ranmax>ranflat3? ranmax : ranflat3);
548 G4RandFlat::shoot((G4double)0.,(G4double)f << 333
549 G4double ranmax = (ranflat1>ranflat2? ranfla << 334 // - random decay angle
550 ranmax = (ranmax>ranflat3? ranmax : ranflat3 << 335 G4double theta=pi*G4UniformRand(); // isotropic decay angle theta
551 << 336 G4double phi =RandFlat::shoot((HepDouble)0.,(HepDouble)2*pi); // isotropic decay angle phi
552 // Isotropic momentum distribution << 337
553 G4double costheta = 2.*G4UniformRand() - 1.0 << 338 // - setup ThreeVector
554 G4double sintheta = std::sqrt(1.0 - costheta << 339 G4double pz=cos(theta)*ranmax;
555 G4double phi = 2.0*pi*G4UniformRand(); << 340 G4double px=sin(theta)*cos(phi)*ranmax;
556 << 341 G4double py=sin(theta)*sin(phi)*ranmax;
557 G4double pz=costheta*ranmax; << 342 G4ThreeVector p(px,py,pz);
558 G4double px=sintheta*std::cos(phi)*ranmax; << 343 return p;
559 G4double py=sintheta*std::sin(phi)*ranmax; << 344 }
560 G4ThreeVector p(px,py,pz); <<
561 return p; <<
562 } <<
563 345
564 << 346 G4ReactionProductVector* G4Nucleus::Fragmentate()
565 G4ReactionProductVector* G4Nucleus::Fragmentat << 347 {
566 { << 348 // needs implementation!
567 // needs implementation! << 349 return NULL;
568 return nullptr; << 350 }
569 } <<
570 351
571 << 352 void G4Nucleus::AddMomentum(const G4ThreeVector aMomentum)
572 void G4Nucleus::AddMomentum(const G4ThreeVecto << 353 {
573 { << 354 momentum+=(aMomentum);
574 momentum+=(aMomentum); << 355 }
575 } <<
576 <<
577 356
578 void G4Nucleus::AddExcitationEnergy( G4double << 357 void G4Nucleus::AddExcitationEnergy( G4double anEnergy )
579 { << 358 {
580 excitationEnergy+=anEnergy; << 359 excitationEnergy+=anEnergy;
581 } << 360 }
582 361
583 /* end of file */ 362 /* end of file */
584 363
585 364