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25 // 25 //
26 // neutron_hp -- source file 26 // neutron_hp -- source file
27 // J.P. Wellisch, Nov-1996 27 // J.P. Wellisch, Nov-1996
28 // A prototype of the low energy neutron trans 28 // A prototype of the low energy neutron transport model.
29 // 29 //
30 // 25-08-06 New Final State type (refFlag==3 , << 30 // 25-08-06 New Final State type (refFlag==3 , Legendre (Low Energy) + Probability (High Energy) )
31 // is added by T. KOI 31 // is added by T. KOI
32 // 080904 Add Protection for negative energy r << 32 // 080904 Add Protection for negative energy results in very low energy ( 1E-6 eV ) scattering by T. Koi
33 // Koi <<
34 // 33 //
35 // P. Arce, June-2014 Conversion neutron_hp to 34 // P. Arce, June-2014 Conversion neutron_hp to particle_hp
36 // 35 //
37 #include "G4ParticleHPElasticFS.hh" 36 #include "G4ParticleHPElasticFS.hh"
>> 37 #include "G4ParticleHPManager.hh"
38 38
39 #include "G4Alpha.hh" << 39 #include "G4PhysicalConstants.hh"
>> 40 #include "G4SystemOfUnits.hh"
>> 41 #include "G4ReactionProduct.hh"
>> 42 #include "G4Nucleus.hh"
>> 43 #include "G4Proton.hh"
40 #include "G4Deuteron.hh" 44 #include "G4Deuteron.hh"
41 #include "G4HadronicParameters.hh" << 45 #include "G4Triton.hh"
42 #include "G4IonTable.hh" << 46 #include "G4Alpha.hh"
>> 47 #include "G4ThreeVector.hh"
43 #include "G4LorentzVector.hh" 48 #include "G4LorentzVector.hh"
44 #include "G4Nucleus.hh" << 49 #include "G4IonTable.hh"
45 #include "G4ParticleHPDataUsed.hh" 50 #include "G4ParticleHPDataUsed.hh"
46 #include "G4ParticleHPManager.hh" <<
47 #include "G4PhysicalConstants.hh" <<
48 #include "G4PhysicsModelCatalog.hh" <<
49 #include "G4Pow.hh" 51 #include "G4Pow.hh"
50 #include "G4Proton.hh" <<
51 #include "G4ReactionProduct.hh" <<
52 #include "G4SystemOfUnits.hh" <<
53 #include "G4ThreeVector.hh" <<
54 #include "G4Triton.hh" <<
55 <<
56 #include "zlib.h" 52 #include "zlib.h"
57 53
58 G4ParticleHPElasticFS::G4ParticleHPElasticFS() << 54 void G4ParticleHPElasticFS::Init (G4double A, G4double Z, G4int M, G4String & dirName, G4String &, G4ParticleDefinition* )
59 { << 55 {
60 svtEmax = 0.0; << 56 G4String tString = "/FS";
61 dbrcEmax = 0.0; << 57 G4bool dbool;
62 dbrcEmin = 0.0; << 58 G4ParticleHPDataUsed aFile = theNames.GetName(static_cast<G4int>(A), static_cast<G4int>(Z), M, dirName, tString, dbool);
63 dbrcAmin = 0.0; << 59 G4String filename = aFile.GetName();
64 dbrcUse = false; << 60 SetAZMs( A, Z, M, aFile );
65 xsForDBRC = nullptr; << 61 //theBaseA = aFile.GetA();
66 << 62 //theBaseZ = aFile.GetZ();
67 secID = G4PhysicsModelCatalog::GetModelID("m << 63 if(!dbool)
68 << 64 {
69 hasXsec = false; << 65 hasAnyData = false;
70 theCoefficients = nullptr; << 66 hasFSData = false;
71 theProbArray = nullptr; << 67 hasXsec = false;
72 << 68 return;
73 repFlag = 0; <<
74 tE_of_repFlag3 = 0.0; <<
75 targetMass = 0.0; <<
76 frameFlag = 0; <<
77 } <<
78 <<
79 void G4ParticleHPElasticFS::Init(G4double A, G <<
80 const G4Strin <<
81 G4ParticleDef <<
82 { <<
83 G4String tString = "/FS"; <<
84 G4bool dbool = true; <<
85 SetA_Z(A, Z, M); <<
86 const G4ParticleHPDataUsed& aFile = <<
87 theNames.GetName(theBaseA, theBaseZ, M, di <<
88 const G4String& filename = aFile.GetName(); <<
89 SetAZMs(aFile); <<
90 if (!dbool) { <<
91 hasAnyData = false; <<
92 hasFSData = false; <<
93 hasXsec = false; <<
94 return; <<
95 } <<
96 <<
97 // 130205 For compressed data files <<
98 std::istringstream theData(std::ios::in); <<
99 G4ParticleHPManager::GetInstance()->GetDataS <<
100 // 130205 END <<
101 theData >> repFlag >> targetMass >> frameFla <<
102 <<
103 if (repFlag == 1) { <<
104 G4int nEnergy; <<
105 theData >> nEnergy; <<
106 theCoefficients = new G4ParticleHPLegendre <<
107 theCoefficients->InitInterpolation(theData <<
108 G4double temp, energy; <<
109 G4int tempdep, nLegendre; <<
110 G4int i, ii; <<
111 for (i = 0; i < nEnergy; i++) { <<
112 theData >> temp >> energy >> tempdep >> <<
113 energy *= eV; <<
114 theCoefficients->Init(i, energy, nLegend <<
115 theCoefficients->SetTemperature(i, temp) <<
116 G4double coeff = 0; <<
117 for (ii = 0; ii < nLegendre; ii++) { <<
118 // load legendre coefficients. <<
119 theData >> coeff; <<
120 theCoefficients->SetCoeff(i, ii + 1, c <<
121 } <<
122 } 69 }
123 } << 70 //130205 For compressed data files
124 else if (repFlag == 2) { << 71 std::istringstream theData(std::ios::in);
125 G4int nEnergy; << 72 G4ParticleHPManager::GetInstance()->GetDataStream(filename,theData);
126 theData >> nEnergy; << 73 //130205 END
127 theProbArray = new G4ParticleHPPartial(nEn << 74 theData >> repFlag >> targetMass >> frameFlag;
128 theProbArray->InitInterpolation(theData); << 75 if(repFlag==1)
129 G4double temp, energy; << 76 {
130 G4int tempdep, nPoints; << 77 G4int nEnergy;
131 for (G4int i = 0; i < nEnergy; i++) { << 78 theData >> nEnergy;
132 theData >> temp >> energy >> tempdep >> << 79 theCoefficients = new G4ParticleHPLegendreStore(nEnergy);
133 energy *= eV; << 80 theCoefficients->InitInterpolation(theData);
134 theProbArray->InitInterpolation(i, theDa << 81 G4double temp, energy;
135 theProbArray->SetT(i, temp); << 82 G4int tempdep, nLegendre;
136 theProbArray->SetX(i, energy); << 83 G4int i, ii;
137 G4double prob, costh; << 84 for (i=0; i<nEnergy; i++)
138 for (G4int ii = 0; ii < nPoints; ii++) { << 85 {
139 // fill probability arrays. << 86 theData >> temp >> energy >> tempdep >> nLegendre;
140 theData >> costh >> prob; << 87 energy *=eV;
141 theProbArray->SetX(i, ii, costh); << 88 theCoefficients->Init(i, energy, nLegendre);
142 theProbArray->SetY(i, ii, prob); << 89 theCoefficients->SetTemperature(i, temp);
>> 90 G4double coeff=0;
>> 91 for(ii=0; ii<nLegendre; ii++)
>> 92 {
>> 93 // load legendre coefficients.
>> 94 theData >> coeff;
>> 95 theCoefficients->SetCoeff(i, ii+1, coeff); // @@@HPW@@@
>> 96 }
143 } 97 }
144 theProbArray->DoneSetXY(i); <<
145 } 98 }
146 } << 99 else if (repFlag==2)
147 else if (repFlag == 3) { << 100 {
148 G4int nEnergy_Legendre; << 101 G4int nEnergy;
149 theData >> nEnergy_Legendre; << 102 theData >> nEnergy;
150 if (nEnergy_Legendre <= 0) { << 103 theProbArray = new G4ParticleHPPartial(nEnergy, nEnergy);
151 std::stringstream iss; << 104 theProbArray->InitInterpolation(theData);
152 iss << "G4ParticleHPElasticFS::Init Data << 105 G4double temp, energy;
153 iss << "Z, A and M of problematic file i << 106 G4int tempdep, nPoints;
154 << theNDLDataM << " respectively."; << 107 for(G4int i=0; i<nEnergy; i++)
155 throw G4HadronicException(__FILE__, __LI << 108 {
156 } << 109 theData >> temp >> energy >> tempdep >> nPoints;
157 theCoefficients = new G4ParticleHPLegendre << 110 energy *= eV;
158 theCoefficients->InitInterpolation(theData << 111 theProbArray->InitInterpolation(i, theData);
159 G4double temp, energy; << 112 theProbArray->SetT(i, temp);
160 G4int tempdep, nLegendre; << 113 theProbArray->SetX(i, energy);
161 << 114 G4double prob, costh;
162 for (G4int i = 0; i < nEnergy_Legendre; i+ << 115 for(G4int ii=0; ii<nPoints; ii++)
163 theData >> temp >> energy >> tempdep >> << 116 {
164 energy *= eV; << 117 // fill probability arrays.
165 theCoefficients->Init(i, energy, nLegend << 118 theData >> costh >> prob;
166 theCoefficients->SetTemperature(i, temp) << 119 theProbArray->SetX(i, ii, costh);
167 G4double coeff = 0; << 120 theProbArray->SetY(i, ii, prob);
168 for (G4int ii = 0; ii < nLegendre; ii++) << 121 }
169 // load legendre coefficients. << 122 theProbArray->DoneSetXY( i );
170 theData >> coeff; <<
171 theCoefficients->SetCoeff(i, ii + 1, c <<
172 } 123 }
173 } 124 }
174 << 125 else if ( repFlag==3 )
175 tE_of_repFlag3 = energy; << 126 {
176 << 127 G4int nEnergy_Legendre;
177 G4int nEnergy_Prob; << 128 theData >> nEnergy_Legendre;
178 theData >> nEnergy_Prob; << 129 if ( nEnergy_Legendre == 0 ) {
179 theProbArray = new G4ParticleHPPartial(nEn << 130 std::stringstream iss;
180 theProbArray->InitInterpolation(theData); << 131 iss << "G4ParticleHPElasticFS::Init Data Error repFlag is 3 but nEnergy_Legendre is 0.";
181 G4int nPoints; << 132 iss << "Z, A and M of problematic file is " << theNDLDataZ << ", " << theNDLDataA << " and " << theNDLDataM << " respectively.";
182 for (G4int i = 0; i < nEnergy_Prob; i++) { << 133 throw G4HadronicException(__FILE__, __LINE__, iss.str() );
183 theData >> temp >> energy >> tempdep >> << 134 }
184 energy *= eV; << 135 theCoefficients = new G4ParticleHPLegendreStore( nEnergy_Legendre );
185 << 136 theCoefficients->InitInterpolation( theData );
186 // consistency check << 137 G4double temp, energy;
187 if (i == 0) << 138 G4int tempdep, nLegendre;
188 // if ( energy != tE_of_repFlag3 ) //1 << 139 //G4int i, ii;
189 if (std::abs(energy - tE_of_repFlag3) << 140 for ( G4int i = 0 ; i < nEnergy_Legendre ; i++ )
190 G4cout << "Warning Transition Energy << 141 {
191 << 142 theData >> temp >> energy >> tempdep >> nLegendre;
192 theProbArray->InitInterpolation(i, theDa << 143 energy *=eV;
193 theProbArray->SetT(i, temp); << 144 theCoefficients->Init( i , energy , nLegendre );
194 theProbArray->SetX(i, energy); << 145 theCoefficients->SetTemperature( i , temp );
195 G4double prob, costh; << 146 G4double coeff = 0;
196 for (G4int ii = 0; ii < nPoints; ii++) { << 147 for (G4int ii = 0 ; ii < nLegendre ; ii++ )
197 // fill probability arrays. << 148 {
198 theData >> costh >> prob; << 149 // load legendre coefficients.
199 theProbArray->SetX(i, ii, costh); << 150 theData >> coeff;
200 theProbArray->SetY(i, ii, prob); << 151 theCoefficients->SetCoeff(i, ii+1, coeff); // @@@HPW@@@
201 } << 152 }
202 theProbArray->DoneSetXY(i); << 153 }
>> 154
>> 155 tE_of_repFlag3 = energy;
>> 156
>> 157 G4int nEnergy_Prob;
>> 158 theData >> nEnergy_Prob;
>> 159 theProbArray = new G4ParticleHPPartial( nEnergy_Prob , nEnergy_Prob );
>> 160 theProbArray->InitInterpolation( theData );
>> 161 G4int nPoints;
>> 162 for ( G4int i=0 ; i < nEnergy_Prob ; i++ )
>> 163 {
>> 164 theData >> temp >> energy >> tempdep >> nPoints;
>> 165
>> 166 energy *= eV;
>> 167
>> 168 // consistency check
>> 169 if ( i == 0 )
>> 170 //if ( energy != tE_of_repFlag3 ) //110620TK This is too tight for 32bit machines
>> 171 if ( std::abs( energy - tE_of_repFlag3 ) / tE_of_repFlag3 > 1.0e-15 )
>> 172 G4cout << "Warning Transition Energy of repFlag3 is not consistent." << G4endl;
>> 173
>> 174 theProbArray->InitInterpolation( i , theData );
>> 175 theProbArray->SetT( i , temp );
>> 176 theProbArray->SetX( i , energy );
>> 177 G4double prob, costh;
>> 178 for( G4int ii = 0 ; ii < nPoints ; ii++ )
>> 179 {
>> 180 // fill probability arrays.
>> 181 theData >> costh >> prob;
>> 182 theProbArray->SetX( i , ii , costh );
>> 183 theProbArray->SetY( i , ii , prob );
>> 184 }
>> 185 theProbArray->DoneSetXY( i );
>> 186 }
203 } 187 }
>> 188 else if (repFlag==0)
>> 189 {
>> 190 theData >> frameFlag;
>> 191 }
>> 192 else
>> 193 {
>> 194 G4cout << "unusable number for repFlag: repFlag="<<repFlag<<G4endl;
>> 195 throw G4HadronicException(__FILE__, __LINE__, "G4ParticleHPElasticFS::Init -- unusable number for repFlag");
>> 196 }
>> 197 //130205 For compressed data files(theData changed from ifstream to istringstream)
>> 198 //theData.close();
204 } 199 }
205 else if (repFlag == 0) { << 200 G4HadFinalState * G4ParticleHPElasticFS::ApplyYourself(const G4HadProjectile & theTrack)
206 theData >> frameFlag; << 201 {
207 } << 202 // G4cout << "G4ParticleHPElasticFS::ApplyYourself+"<<G4endl;
208 else { << 203 if ( theResult.Get() == NULL ) theResult.Put( new G4HadFinalState );
209 G4cout << "unusable number for repFlag: re << 204 theResult.Get()->Clear();
210 throw G4HadronicException(__FILE__, __LINE << 205 G4double eKinetic = theTrack.GetKineticEnergy();
211 "G4ParticleHPEla << 206 const G4HadProjectile *incidentParticle = &theTrack;
212 } << 207 G4ReactionProduct theNeutron( const_cast<G4ParticleDefinition *>(incidentParticle->GetDefinition() ));
213 // 130205 For compressed data files(theData << 208 theNeutron.SetMomentum( incidentParticle->Get4Momentum().vect() );
214 // theData.close(); << 209 theNeutron.SetKineticEnergy( eKinetic );
215 } << 210 // G4cout << "G4ParticleHPElasticFS::ApplyYourself++"<<eKinetic<<" "<<G4endl;
216 << 211 // G4cout << "CMSVALUES 0 "<<theNeutron.GetTotalMomentum()<<G4endl;
217 G4HadFinalState* G4ParticleHPElasticFS::ApplyY << 212
218 { << 213 G4ReactionProduct theTarget;
219 if (theResult.Get() == nullptr) theResult.Pu << 214 G4Nucleus aNucleus;
220 theResult.Get()->Clear(); << 215 G4ThreeVector neuVelo = (1./incidentParticle->GetDefinition()->GetPDGMass())*theNeutron.GetMomentum();
221 G4double eKinetic = theTrack.GetKineticEnerg << 216 theTarget = aNucleus.GetBiasedThermalNucleus( targetMass, neuVelo, theTrack.GetMaterial()->GetTemperature());
222 const G4HadProjectile* incidentParticle = &t << 217 //t theTarget.SetDefinition( G4IonTable::GetIonTable()->GetIon( G4int(theBaseZ), G4int(theBaseA) , 0.0 ) ); //TESTPHP
223 G4ReactionProduct theNeutron( << 218 // G4cout << "Nucleus-test"<<" "<<targetMass<<" ";
224 const_cast<G4ParticleDefinition*>(incident << 219 // G4cout << theTarget.GetMomentum().x()<<" ";
225 theNeutron.SetMomentum(incidentParticle->Get << 220 // G4cout << theTarget.GetMomentum().y()<<" ";
226 theNeutron.SetKineticEnergy(eKinetic); << 221 // G4cout << theTarget.GetMomentum().z()<<G4endl;
227 << 222
228 G4ThreeVector neuVelo = << 223 // neutron and target defined as reaction products.
229 (1. / incidentParticle->GetDefinition()->G << 224
230 G4ReactionProduct theTarget = << 225 // prepare lorentz-transformation to Lab.
231 GetBiasedThermalNucleus(targetMass, neuVel << 226
232 << 227 G4ThreeVector the3Neutron = theNeutron.GetMomentum();
233 // Neutron and target defined as G4ReactionP << 228 G4double nEnergy = theNeutron.GetTotalEnergy();
234 // Prepare Lorentz transformation to lab << 229 G4ThreeVector the3Target = theTarget.GetMomentum();
235 << 230 // cout << "@@@" << the3Target<<G4endl;
236 G4ThreeVector the3Neutron = theNeutron.GetMo << 231 G4double tEnergy = theTarget.GetTotalEnergy();
237 G4double nEnergy = theNeutron.GetTotalEnergy << 232 G4ReactionProduct theCMS;
238 G4ThreeVector the3Target = theTarget.GetMome << 233 G4double totE = nEnergy+tEnergy;
239 G4double tEnergy = theTarget.GetTotalEnergy( << 234 G4ThreeVector the3CMS = the3Target+the3Neutron;
240 G4ReactionProduct theCMS; << 235 theCMS.SetMomentum(the3CMS);
241 G4double totE = nEnergy + tEnergy; << 236 G4double cmsMom = std::sqrt(the3CMS*the3CMS);
242 G4ThreeVector the3CMS = the3Target + the3Neu << 237 G4double sqrts = std::sqrt((totE-cmsMom)*(totE+cmsMom));
243 theCMS.SetMomentum(the3CMS); << 238 theCMS.SetMass(sqrts);
244 G4double cmsMom = std::sqrt(the3CMS * the3CM << 239 theCMS.SetTotalEnergy(totE);
245 G4double sqrts = std::sqrt((totE - cmsMom) * << 240
246 theCMS.SetMass(sqrts); << 241 // data come as fcn of n-energy in nuclear rest frame
247 theCMS.SetTotalEnergy(totE); << 242 G4ReactionProduct boosted;
248 << 243 boosted.Lorentz(theNeutron, theTarget);
249 // Data come as function of n-energy in nucl << 244 eKinetic = boosted.GetKineticEnergy(); // get kinetic energy for scattering
250 G4ReactionProduct boosted; << 245 G4double cosTh = -2;
251 boosted.Lorentz(theNeutron, theTarget); << 246 if(repFlag == 1)
252 eKinetic = boosted.GetKineticEnergy(); // g << 247 {
253 G4double cosTh = -2; <<
254 <<
255 if (repFlag == 1) { <<
256 cosTh = theCoefficients->SampleElastic(eKi <<
257 } <<
258 else if (repFlag == 2) { <<
259 cosTh = theProbArray->Sample(eKinetic); <<
260 } <<
261 else if (repFlag == 3) { <<
262 if (eKinetic <= tE_of_repFlag3) { <<
263 cosTh = theCoefficients->SampleElastic(e 248 cosTh = theCoefficients->SampleElastic(eKinetic);
264 } 249 }
265 else { << 250
>> 251 else if (repFlag==2)
>> 252 {
266 cosTh = theProbArray->Sample(eKinetic); 253 cosTh = theProbArray->Sample(eKinetic);
267 } 254 }
268 } << 255 else if (repFlag==3)
269 else if (repFlag == 0) { << 256 {
270 cosTh = 2. * G4UniformRand() - 1.; << 257 if ( eKinetic <= tE_of_repFlag3 )
271 } << 258 {
272 else { << 259 cosTh = theCoefficients->SampleElastic(eKinetic);
273 G4cout << "Unusable number for repFlag: re << 260 }
274 throw G4HadronicException(__FILE__, __LINE << 261 else
275 "G4ParticleHPEla << 262 {
276 } << 263 cosTh = theProbArray->Sample(eKinetic);
277 << 264 }
278 if (cosTh < -1.1) { <<
279 return nullptr; <<
280 } <<
281 <<
282 G4double phi = twopi * G4UniformRand(); <<
283 G4double cosPhi = std::cos(phi); <<
284 G4double sinPhi = std::sin(phi); <<
285 G4double theta = std::acos(cosTh); <<
286 G4double sinth = std::sin(theta); <<
287 <<
288 if (frameFlag == 1) { <<
289 // Projectile scattering values cosTh are <<
290 // In this frame, do relativistic calculat <<
291 // target 4-momenta <<
292 <<
293 theNeutron.Lorentz(theNeutron, theTarget); <<
294 G4double mN = theNeutron.GetMass(); <<
295 G4double Pinit = theNeutron.GetTotalMoment <<
296 G4double Einit = theNeutron.GetTotalEnergy <<
297 G4double mT = theTarget.GetMass(); <<
298 <<
299 G4double ratio = mT / mN; <<
300 G4double sqt = std::sqrt(ratio * ratio - 1 <<
301 G4double beta = Pinit / (mT + Einit); // <<
302 G4double denom = 1. - beta * beta * cosTh <<
303 G4double term1 = cosTh * (Einit * ratio + <<
304 G4double pN = beta * mN * (term1 + sqt) / <<
305 <<
306 // Get the scattered momentum and rotate i <<
307 G4ThreeVector pDir = theNeutron.GetMomentu <<
308 G4double px = pN * pDir.x(); <<
309 G4double py = pN * pDir.y(); <<
310 G4double pz = pN * pDir.z(); <<
311 <<
312 G4ThreeVector pcmRot; <<
313 pcmRot.setX(px * cosTh * cosPhi - py * sin <<
314 pcmRot.setY(px * cosTh * sinPhi + py * cos <<
315 pcmRot.setZ(-px * sinth + pz * cosTh); <<
316 theNeutron.SetMomentum(pcmRot); <<
317 G4double eN = std::sqrt(pN * pN + mN * mN) <<
318 theNeutron.SetTotalEnergy(eN); <<
319 <<
320 // Get the scattered target momentum <<
321 G4ReactionProduct toLab(-1. * theTarget); <<
322 theTarget.SetMomentum(pDir * Pinit - pcmRo <<
323 G4double eT = Einit - eN + mT; <<
324 theTarget.SetTotalEnergy(eT); <<
325 <<
326 // Now back to lab frame <<
327 theNeutron.Lorentz(theNeutron, toLab); <<
328 theTarget.Lorentz(theTarget, toLab); <<
329 <<
330 // 111005 Protection for not producing 0 k <<
331 if (theNeutron.GetKineticEnergy() <= 0) <<
332 theNeutron.SetTotalEnergy(theNeutron.Get <<
333 * (1. + G4Pow: <<
334 if (theTarget.GetKineticEnergy() <= 0) <<
335 theTarget.SetTotalEnergy(theTarget.GetMa <<
336 } <<
337 else if (frameFlag == 2) { <<
338 // Projectile scattering values cosTh take <<
339 <<
340 G4LorentzVector proj(nEnergy, the3Neutron) <<
341 G4LorentzVector targ(tEnergy, the3Target); <<
342 G4ThreeVector boostToCM = proj.findBoostTo <<
343 proj.boost(boostToCM); <<
344 targ.boost(boostToCM); <<
345 <<
346 // Rotate projectile and target momenta by <<
347 // Note: at this point collision axis is n <<
348 // momentum given target nucleus by <<
349 G4double px = proj.px(); <<
350 G4double py = proj.py(); <<
351 G4double pz = proj.pz(); <<
352 <<
353 G4ThreeVector pcmRot; <<
354 pcmRot.setX(px * cosTh * cosPhi - py * sin <<
355 pcmRot.setY(px * cosTh * sinPhi + py * cos <<
356 pcmRot.setZ(-px * sinth + pz * cosTh); <<
357 proj.setVect(pcmRot); <<
358 targ.setVect(-pcmRot); <<
359 <<
360 // Back to lab frame <<
361 proj.boost(-boostToCM); <<
362 targ.boost(-boostToCM); <<
363 <<
364 theNeutron.SetMomentum(proj.vect()); <<
365 theNeutron.SetTotalEnergy(proj.e()); <<
366 <<
367 theTarget.SetMomentum(targ.vect()); <<
368 theTarget.SetTotalEnergy(targ.e()); <<
369 <<
370 // 080904 Add Protection for very low ener <<
371 if (theNeutron.GetKineticEnergy() <= 0) { <<
372 theNeutron.SetTotalEnergy(theNeutron.Get <<
373 * (1. + G4Pow: <<
374 } <<
375 <<
376 // 080904 Add Protection for very low ener <<
377 if (theTarget.GetKineticEnergy() <= 0) { <<
378 theTarget.SetTotalEnergy(theTarget.GetMa <<
379 } 265 }
380 } << 266 else if (repFlag==0)
381 else { << 267 {
382 G4cout << "Value of frameFlag (1=LAB, 2=CM << 268 cosTh = 2.*G4UniformRand()-1.;
383 throw G4HadronicException(__FILE__, __LINE << 269 }
384 "G4ParticleHPEla << 270 else
385 } << 271 {
386 << 272 G4cout << "unusable number for repFlag: repFlag="<<repFlag<<G4endl;
387 // Everything is now in the lab frame << 273 throw G4HadronicException(__FILE__, __LINE__, "G4ParticleHPElasticFS::Init -- unusable number for repFlag");
388 // Set energy change and momentum change << 274 }
389 theResult.Get()->SetEnergyChange(theNeutron. << 275 if(cosTh<-1.1) { return 0; }
390 theResult.Get()->SetMomentumChange(theNeutro << 276 G4double phi = twopi*G4UniformRand();
391 << 277 G4double theta = std::acos(cosTh);
392 // Make recoil a G4DynamicParticle << 278 G4double sinth = std::sin(theta);
393 auto theRecoil = new G4DynamicParticle; << 279 if (frameFlag == 1) // final state data given in target rest frame.
394 theRecoil->SetDefinition(G4IonTable::GetIonT << 280 {
395 << 281 // we have the scattering angle, now we need the energy, then do the
396 theRecoil->SetMomentum(theTarget.GetMomentum << 282 // boosting.
397 theResult.Get()->AddSecondary(theRecoil, sec << 283 // relativistic elastic scattering energy angular correlation:
398 << 284 theNeutron.Lorentz(theNeutron, theTarget);
399 // Postpone the tracking of the primary neut << 285 G4double e0 = theNeutron.GetTotalEnergy();
400 theResult.Get()->SetStatusChange(suspend); << 286 G4double p0 = theNeutron.GetTotalMomentum();
401 return theResult.Get(); << 287 G4double mN = theNeutron.GetMass();
402 } << 288 G4double mT = theTarget.GetMass();
403 << 289 G4double eE = e0+mT;
404 void G4ParticleHPElasticFS::InitializeScatteri << 290 G4double ap = (mT+eE)*(mT-eE) + (p0+mN)*(p0-mN);
>> 291 G4double a = 4*(eE+p0*cosTh)*(eE-p0*cosTh);
>> 292 G4double b = 4*ap*p0*cosTh;
>> 293 G4double c = (2.*eE*mN-ap)*(2.*eE*mN+ap);
>> 294 G4double en = (-b+std::sqrt(b*b - 4*a*c) )/(2*a);
>> 295 G4ThreeVector tempVector(en*sinth*std::cos(phi), en*sinth*std::sin(phi), en*std::cos(theta) );
>> 296 theNeutron.SetMomentum(tempVector);
>> 297 theNeutron.SetTotalEnergy(std::sqrt(en*en+theNeutron.GetMass()*theNeutron.GetMass()));
>> 298 // first to lab
>> 299 theNeutron.Lorentz(theNeutron, -1.*theTarget);
>> 300 // now to CMS
>> 301 theNeutron.Lorentz(theNeutron, theCMS);
>> 302 theTarget.SetMomentum(-theNeutron.GetMomentum());
>> 303 theTarget.SetTotalEnergy(theNeutron.GetTotalEnergy());
>> 304 // and back to lab
>> 305 theNeutron.Lorentz(theNeutron, -1.*theCMS);
>> 306 theTarget.Lorentz(theTarget, -1.*theCMS);
>> 307 //111005 Protection for not producing 0 kinetic energy target
>> 308 if ( theNeutron.GetKineticEnergy() <= 0 ) theNeutron.SetTotalEnergy ( theNeutron.GetMass() * ( 1 + G4Pow::GetInstance()->powA( 10 , -15.65 ) ) );
>> 309 if ( theTarget.GetKineticEnergy() <= 0 ) theTarget.SetTotalEnergy ( theTarget.GetMass() * ( 1 + G4Pow::GetInstance()->powA( 10 , -15.65 ) ) );
>> 310 }
>> 311 else if (frameFlag == 2) // CMS
>> 312 {
>> 313 theNeutron.Lorentz(theNeutron, theCMS);
>> 314 theTarget.Lorentz(theTarget, theCMS);
>> 315 G4double en = theNeutron.GetTotalMomentum(); // already in CMS.
>> 316 G4ThreeVector cmsMom_tmp=theNeutron.GetMomentum(); // for neutron direction in CMS
>> 317 G4double cms_theta=cmsMom_tmp.theta();
>> 318 G4double cms_phi=cmsMom_tmp.phi();
>> 319 G4ThreeVector tempVector;
>> 320 tempVector.setX(std::cos(theta)*std::sin(cms_theta)*std::cos(cms_phi)
>> 321 +std::sin(theta)*std::cos(phi)*std::cos(cms_theta)*std::cos(cms_phi)
>> 322 -std::sin(theta)*std::sin(phi)*std::sin(cms_phi) );
>> 323 tempVector.setY(std::cos(theta)*std::sin(cms_theta)*std::sin(cms_phi)
>> 324 +std::sin(theta)*std::cos(phi)*std::cos(cms_theta)*std::sin(cms_phi)
>> 325 +std::sin(theta)*std::sin(phi)*std::cos(cms_phi) );
>> 326 tempVector.setZ(std::cos(theta)*std::cos(cms_theta)
>> 327 -std::sin(theta)*std::cos(phi)*std::sin(cms_theta) );
>> 328 tempVector *= en;
>> 329 theNeutron.SetMomentum(tempVector);
>> 330 theTarget.SetMomentum(-tempVector);
>> 331 G4double tP = theTarget.GetTotalMomentum();
>> 332 G4double tM = theTarget.GetMass();
>> 333 theTarget.SetTotalEnergy(std::sqrt((tP+tM)*(tP+tM)-2.*tP*tM));
>> 334
>> 335 /*
>> 336 For debug purpose.
>> 337 Same transformation G4ReactionProduct.Lorentz() by 4vectors
405 { 338 {
406 // Initialize DBRC variables << 339 G4LorentzVector n4p = G4LorentzVector ( theNeutron.GetMomentum() , theNeutron.GetKineticEnergy() + theNeutron.GetMass() );
407 svtEmax = G4HadronicParameters::Instance()-> << 340 G4cout << "before " << ( n4p.e() - n4p.m() ) / eV<< G4endl;
408 G4ParticleHPManager* manager = G4ParticleHPM << 341 G4LorentzVector cm4p = G4LorentzVector ( theCMS.GetMomentum() , theCMS.GetKineticEnergy() + theCMS.GetMass() );
409 dbrcUse = manager->GetUseDBRC(); << 342 n4p.boost( cm4p.boostVector() );
410 dbrcEmax = manager->GetMaxEnergyDBRC(); << 343 G4cout << cm4p/eV << G4endl;
411 dbrcEmin = manager->GetMinEnergyDBRC(); << 344 G4cout << "after " << ( n4p.e() - n4p.m() ) / eV<< G4endl;
412 dbrcAmin = manager->GetMinADBRC(); <<
413 } 345 }
>> 346 */
414 347
415 G4ReactionProduct G4ParticleHPElasticFS::GetBi << 348 theNeutron.Lorentz(theNeutron, -1.*theCMS);
416 << 349 //080904 Add Protection for very low energy (1e-6eV) scattering
417 << 350 if ( theNeutron.GetKineticEnergy() <= 0 )
418 { << 351 {
419 // This new method implements the DBRC (Dopp << 352 //theNeutron.SetMomentum( G4ThreeVector(0) );
420 // on top of the SVT (Sampling of the Veloci << 353 //theNeutron.SetTotalEnergy ( theNeutron.GetMass() );
421 // The SVT algorithm was written by Loic Thu << 354 //110822 Protection for not producing 0 kinetic energy neutron
422 // the method G4Nucleus::GetBiasedThermalNuc << 355 theNeutron.SetTotalEnergy ( theNeutron.GetMass() * ( 1 + G4Pow::GetInstance()->powA( 10 , -15.65 ) ) );
423 // implemented the DBRC algorithm on top of <<
424 // While the SVT algorithm is still present <<
425 // the DBRC algorithm on top of the SVT one <<
426 // order to avoid a cycle dependency between <<
427 <<
428 InitializeScatteringKernelParameters(); <<
429 <<
430 // Set threshold for SVT algorithm <<
431 G4double E_threshold = svtEmax; <<
432 if (svtEmax == -1.) { <<
433 // If E_neutron <= 400*kB*T (400 is a comm <<
434 // then apply the Sampling ot the Velocity <<
435 // else consider the target nucleus being <<
436 E_threshold = 400.0 * 8.617333262E-11 * te <<
437 } <<
438 <<
439 // If DBRC is enabled and the nucleus is hea <<
440 if (dbrcUse && aMass >= dbrcAmin) { <<
441 E_threshold = std::max(svtEmax, dbrcEmax); <<
442 } <<
443 <<
444 G4double E_neutron = 0.5 * aVelocity.mag2() <<
445 <<
446 G4bool dbrcIsOn = dbrcUse && E_neutron >= db <<
447 <<
448 G4Nucleus aNucleus; <<
449 if (E_neutron > E_threshold || !dbrcIsOn) { <<
450 // Apply only the SVT algorithm, not the D <<
451 return aNucleus.GetBiasedThermalNucleus(ta <<
452 } <<
453 <<
454 G4ReactionProduct result; <<
455 result.SetMass(aMass * G4Neutron::Neutron()- <<
456 <<
457 // Beta = sqrt(m/2kT) <<
458 G4double beta = <<
459 std::sqrt(result.GetMass() <<
460 / (2. * 8.617333262E-11 * temp)) <<
461 <<
462 // Neutron speed vn <<
463 G4double vN_norm = aVelocity.mag(); <<
464 G4double vN_norm2 = vN_norm * vN_norm; <<
465 G4double y = beta * vN_norm; <<
466 <<
467 // Normalize neutron velocity <<
468 aVelocity = (1. / vN_norm) * aVelocity; <<
469 <<
470 // Variables for sampling of target speed an <<
471 G4double x2; <<
472 G4double randThresholdSVT; <<
473 G4double vT_norm, vT_norm2, mu; <<
474 G4double acceptThresholdSVT; <<
475 G4double vRelativeSpeed; <<
476 G4double cdf0 = 2. / (2. + std::sqrt(CLHEP:: <<
477 <<
478 // DBRC variables <<
479 G4double xsRelative = -99.; <<
480 G4double randThresholdDBRC = 0.; <<
481 // Calculate max cross-section in interval f <<
482 G4double eMin = <<
483 0.5 * G4Neutron::Neutron()->GetPDGMass() * <<
484 G4double eMax = <<
485 0.5 * G4Neutron::Neutron()->GetPDGMass() * <<
486 G4double xsMax = xsForDBRC->GetMaxY(eMin, eM <<
487 <<
488 do { <<
489 do { <<
490 // Sample the target velocity vT in the <<
491 if (G4UniformRand() < cdf0) { <<
492 // Sample in C45 from https://laws.lan <<
493 x2 = -std::log(G4UniformRand() * G4Uni <<
494 } 356 }
495 else { <<
496 // Sample in C61 from https://laws.lan <<
497 G4double ampl = std::cos(CLHEP::pi / 2 <<
498 x2 = -std::log(G4UniformRand()) - std: <<
499 } <<
500 <<
501 vT_norm = std::sqrt(x2) / beta; <<
502 vT_norm2 = vT_norm * vT_norm; <<
503 357
504 // Sample cosine between the incident ne << 358 theTarget.Lorentz(theTarget, -1.*theCMS);
505 mu = 2. * G4UniformRand() - 1.; << 359 //080904 Add Protection for very low energy (1e-6eV) scattering
506 << 360 if ( theTarget.GetKineticEnergy() < 0 )
507 // Define acceptance threshold for SVT << 361 {
508 vRelativeSpeed = std::sqrt(vN_norm2 + vT << 362 //theTarget.SetMomentum( G4ThreeVector(0) );
509 acceptThresholdSVT = vRelativeSpeed / (v << 363 //theTarget.SetTotalEnergy ( theTarget.GetMass() );
510 randThresholdSVT = G4UniformRand(); << 364 //110822 Protection for not producing 0 kinetic energy target
511 } while (randThresholdSVT >= acceptThresho << 365 theTarget.SetTotalEnergy ( theTarget.GetMass() * ( 1 + G4Pow::GetInstance()->powA( 10 , -15.65 ) ) );
512 << 366 }
513 // Apply DBRC rejection << 367 }
514 xsRelative = xsForDBRC->GetXsec(0.5 * G4Ne << 368 else
515 * vRelativ << 369 {
516 randThresholdDBRC = G4UniformRand(); << 370 G4cout <<"Value of frameFlag (1=LAB, 2=CMS): "<<frameFlag;
517 << 371 throw G4HadronicException(__FILE__, __LINE__, "G4ParticleHPElasticFS::ApplyYourSelf frameflag incorrect");
518 } while (randThresholdDBRC >= xsRelative / x << 372 }
519 << 373 // now all in Lab
520 aNucleus.DoKinematicsOfThermalNucleus(mu, vT << 374 // nun den recoil generieren...und energy change, momentum change angeben.
521 << 375 theResult.Get()->SetEnergyChange(theNeutron.GetKineticEnergy());
522 return result; << 376 theResult.Get()->SetMomentumChange(theNeutron.GetMomentum().unit());
523 } << 377 G4DynamicParticle* theRecoil = new G4DynamicParticle;
>> 378 theRecoil->SetDefinition( G4IonTable::GetIonTable()->GetIon(static_cast<G4int>(theBaseZ), static_cast<G4int>(theBaseA), 0 ) );
>> 379 theRecoil->SetMomentum(theTarget.GetMomentum());
>> 380 theResult.Get()->AddSecondary(theRecoil);
>> 381 // G4cout << "G4ParticleHPElasticFS::ApplyYourself 10+"<<G4endl;
>> 382 // postpone the tracking of the primary neutron
>> 383 theResult.Get()->SetStatusChange(suspend);
>> 384 return theResult.Get();
>> 385 }
524 386