Context Navigation

source: trunk/source/processes/hadronic/models/chiral_inv_phase_space/cross_sections/src/G4QHyperonPlusNuclearCrossSection.cc @ 1315

Last change on this file since 1315 was 1315, checked in by garnier, 14 years ago
update geant4-09-04-beta-cand-01 interfaces-V09-03-09 vis-V09-03-08
File size: 18.6 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	// The lust update: M.V. Kossov, CERN/ITEP(Moscow) 17-June-02
28	// GEANT4 tag $Name: geant4-09-04-beta-cand-01 $
29	//
30	//
31	// G4 Physics class: G4QHyperonPlusNuclearCrossSection for gamma+A cross sections
32	// Created: M.V. Kossov, CERN/ITEP(Moscow), 20-Dec-03
33	// The last update: M.V. Kossov, CERN/ITEP (Moscow) 15-Feb-04
34	// --------------------------------------------------------------------------------
35	// ****************************************************************************************
36	// *** This HEADER is a property of the CHIPS hadronic package in Geant4 (M. Kosov) ***
37	// ********* DO NOT MAKE ANY CHANGE without approval of Mikhail.Kossov@cern.ch ********
38	// ****************************************************************************************
39	// Short description: CHIPS cross-sections for Hyperon(plus)-nuclear interactions
40	// -------------------------------------------------------------------------------------
41	//
42	//#define debug
43	//#define pdebug
44	//#define debug3
45	//#define debugn
46	//#define debugs
47
48	#include "G4QHyperonPlusNuclearCrossSection.hh"
49
50	// Initialization of the
51	G4double* G4QHyperonPlusNuclearCrossSection::lastLEN=0; // Pointer to lastArray of LowEn CS
52	G4double* G4QHyperonPlusNuclearCrossSection::lastHEN=0; // Pointer toLastArray of HighEn CS
53	G4int G4QHyperonPlusNuclearCrossSection::lastN=0; // The last N of calculated nucleus
54	G4int G4QHyperonPlusNuclearCrossSection::lastZ=0; // The last Z of calculated nucleus
55	G4double G4QHyperonPlusNuclearCrossSection::lastP=0.; // Last used in XS Momentum
56	G4double G4QHyperonPlusNuclearCrossSection::lastTH=0.; // Last threshold momentum
57	G4double G4QHyperonPlusNuclearCrossSection::lastCS=0.; // Last value of the Cross Section
58	G4int G4QHyperonPlusNuclearCrossSection::lastI=0; // The last position in the DAMDB
59	std::vector<G4double> G4QHyperonPlusNuclearCrossSection::LEN= new std::vector<G4double*>;
60	std::vector<G4double> G4QHyperonPlusNuclearCrossSection::HEN= new std::vector<G4double*>;
61
62	// Returns Pointer to the G4VQCrossSection class
63	G4VQCrossSection* G4QHyperonPlusNuclearCrossSection::GetPointer()
64	{
65	static G4QHyperonPlusNuclearCrossSection theCrossSection;//Static body of Cross Section
66	return &theCrossSection;
67	}
68
69	G4QHyperonPlusNuclearCrossSection::~G4QHyperonPlusNuclearCrossSection()
70	{
71	G4int lens=LEN->size();
72	for(G4int i=0; i<lens; ++i) delete[] (*LEN)[i];
73	delete LEN;
74	G4int hens=HEN->size();
75	for(G4int i=0; i<hens; ++i) delete[] (*HEN)[i];
76	delete HEN;
77	}
78
79	// The main member function giving the collision cross section (P is in IU, CS is in mb)
80	// Make pMom in independent units ! (Now it is MeV)
81	G4double G4QHyperonPlusNuclearCrossSection::GetCrossSection(G4bool fCS, G4double pMom,
82	G4int tgZ, G4int tgN, G4int PDG)
83	{
84	static G4double tolerance=0.001; // Tolerance (0.1%) to consider as "the same mom"
85	static G4int j; // A#0f Z/N-records already tested in AMDB
86	static std::vector <G4int> colN; // Vector of N for calculated nuclei (isotops)
87	static std::vector <G4int> colZ; // Vector of Z for calculated nuclei (isotops)
88	static std::vector <G4double> colP; // Vector of last momenta for the reaction
89	static std::vector <G4double> colTH; // Vector of energy thresholds for the reaction
90	static std::vector <G4double> colCS; // Vector of last cross sections for the reaction
91	// *---* End of the mandatory Static Definitions of the Associative Memory *---*
92	#ifdef debug
93	G4cout<<"G4QHyPNCS::GetCS:>>>f="<<fCS<<",p="<<pMom<<", Z="<<tgZ<<"("<<lastZ<<") ,N="<<tgN
94	<<"("<<lastN<<"), PDG="<<PDG<<", thresh="<<lastTH<<",Sz="<<colN.size()<<G4endl;
95	#endif
96	if(PDG!=3222) G4cout<<"-Warning-G4QPiMinusCS::GetCS:Not a PiMinus,PDG="<<PDG<<G4endl;
97	G4bool in=false; // By default the isotope must be found in the AMDB
98	if(tgN!=lastN \|\| tgZ!=lastZ) // The nucleus was not the last used isotope
99	{
100	in = false; // By default the isotope haven't be found in AMDB
101	lastP = 0.; // New momentum history (nothing to compare with)
102	lastN = tgN; // The last N of the calculated nucleus
103	lastZ = tgZ; // The last Z of the calculated nucleus
104	lastI = colN.size(); // Size of the Associative Memory DB in the heap
105	j = 0; // A#0f records found in DB for this projectile
106	#ifdef debug
107	G4cout<<"G4QHyPNuclCS::GetCS: the amount of records in the AMDB lastI="<<lastI<<G4endl;
108	#endif
109	if(lastI) for(G4int i=0; i<lastI; i++) // AMDB exists, try to find the (Z,N) isotope
110	{
111	if(colN[i]==tgN && colZ[i]==tgZ) // Try the record "i" in the AMDB
112	{
113	lastI=i; // Remember the index for future fast/last use
114	lastTH =colTH[i]; // The last THreshold (A-dependent)
115	#ifdef debug
116	G4cout<<"G4QHyPCS::GetCS:FoundP="<<pMom<<",Threshold="<<lastTH<<",j="<<j<<G4endl;
117	#endif
118	if(pMom<=lastTH)
119	{
120	#ifdef debug
121	G4cout<<"G4QPCS::GetCS:Found,P="<<pMom<<" < Threshold="<<lastTH<<",CS=0"<<G4endl;
122	#endif
123	return 0.; // Energy is below the Threshold value
124	}
125	lastP =colP [i]; // Last Momentum (A-dependent)
126	lastCS =colCS[i]; // Last CrossSect (A-dependent)
127	if(std::fabs(lastP-pMom)<tolerance*pMom)
128	//if(lastP==pMom) // VI do not use tolerance
129	{
130	#ifdef debug
131	G4cout<<"G4QHyPNCS::GetCS:.DoNothing.P="<<pMom<<",CS="<<lastCS*millibarn<<G4endl;
132	#endif
133	//CalculateCrossSection(fCS,-1,j,PDG,lastZ,lastN,pMom); // Update param's only
134	return lastCS*millibarn; // Use theLastCS
135	}
136	in = true; // This is the case when the isotop is found in DB
137	// Momentum pMom is in IU ! @@ Units
138	#ifdef debug
139	G4cout<<"G4QHyPNCS::G:UpdDB,P="<<pMom<<",f="<<fCS<<",lI="<<lastI<<",j="<<j<<G4endl;
140	#endif
141	lastCS=CalculateCrossSection(fCS,-1,j,PDG,lastZ,lastN,pMom); // read & update
142	#ifdef debug
143	G4cout<<"G4QHyPNuCS::GetCrosSec: *****> New (inDB) Calculated CS="<<lastCS<<G4endl;
144	#endif
145	if(lastCS<=0. && pMom>lastTH) // Correct the threshold (@@ No intermediate Zeros)
146	{
147	#ifdef debug
148	G4cout<<"G4QHyPNuCS::GetCS: New P="<<pMom<<"(CS=0) > Threshold="<<lastTH<<G4endl;
149	#endif
150	lastCS=0.;
151	lastTH=pMom;
152	}
153	break; // Go out of the LOOP
154	}
155	#ifdef debug
156	G4cout<<"-->G4QHyPNucCrossSec::GetCrosSec: pPDG="<<PDG<<", j="<<j<<", N="<<colN[i]
157	<<",Z["<<i<<"]="<<colZ[i]<<G4endl;
158	#endif
159	j++; // Increment a#0f records found in DB
160	}
161	#ifdef debug
162	G4cout<<"-?-G4QHyPNCS::GetCS:R,Z="<<tgZ<<",N="<<tgN<<",i="<<in<<",j="<<j<<" ?"<<G4endl;
163	#endif
164	if(!in) // This isotope has not been calculated previously
165	{
166	#ifdef debug
167	G4cout<<"^G4QHyPNCS::GetCS:CalcNew P="<<pMom<<", f="<<fCS<<", lastI="<<lastI<<G4endl;
168	#endif
169	//!!The slave functions must provide cross-sections in millibarns (mb) !! (not in IU)
170	lastCS=CalculateCrossSection(fCS,0,j,PDG,lastZ,lastN,pMom); //calculate & create
171	//if(lastCS>0.) // It means that the AMBD was initialized
172	//{
173
174	lastTH = ThresholdEnergy(tgZ, tgN); // The Threshold Energy which is now the last
175	#ifdef debug
176	G4cout<<"G4QHypNucCrossSect::GetCrossSect:NewThresh="<<lastTH<<",P="<<pMom<<G4endl;
177	#endif
178	colN.push_back(tgN);
179	colZ.push_back(tgZ);
180	colP.push_back(pMom);
181	colTH.push_back(lastTH);
182	colCS.push_back(lastCS);
183	#ifdef debug
184	G4cout<<"G4QHyPNCS::GetCrosSec:lCS="<<lastCS<<",lZ="<<lastN<<",lN="<<lastZ<<G4endl;
185	#endif
186	//} // M.K. Presence of H1 with high threshold breaks the syncronization
187	#ifdef pdebug
188	G4cout<<"G4QHyPCS::GeCS:1st,P="<<pMom<<"(MeV),CS="<<lastCS*millibarn<<"(mb)"<<G4endl;
189	#endif
190	return lastCS*millibarn;
191	} // End of creation of the new set of parameters
192	else
193	{
194	#ifdef debug
195	G4cout<<"G4QHyPNucCS::GetCS: Update lastI="<<lastI<<",j="<<j<<G4endl;
196	#endif
197	colP[lastI]=pMom;
198	colCS[lastI]=lastCS;
199	}
200	} // End of parameters udate
201	else if(pMom<=lastTH)
202	{
203	#ifdef debug
204	G4cout<<"G4QHyPNCS::GetCS: CurrentP="<<pMom<<" < Threshold="<<lastTH<<", CS=0"<<G4endl;
205	#endif
206	return 0.; // Momentum is below the Threshold Value -> CS=0
207	}
208	else if(std::fabs(lastP-pMom)<tolerance*pMom)
209	//else if(lastP==pMom) // VI do not use tolerance
210	{
211	#ifdef debug
212	G4cout<<"..G4QPCS::GetCS:OldNZ&P="<<lastP<<"="<<pMom<<",CS="<<lastCS*millibarn<<G4endl;
213	#endif
214	return lastCS*millibarn; // Use theLastCS
215	}
216	else // It is the last used -> use the current tables
217	{
218	#ifdef debug
219	G4cout<<"-!-G4QPCS::GetCS:UseCur P="<<pMom<<",f="<<fCS<<",I="<<lastI<<",j="<<j<<G4endl;
220	#endif
221	lastCS=CalculateCrossSection(fCS,1,j,PDG,lastZ,lastN,pMom); // Only read and UpdateDB
222	lastP=pMom;
223	}
224	#ifdef debug
225	G4cout<<"==>G4QHyPNCS::GetCrosS:P="<<pMom<<"(MeV),CS="<<lastCS*millibarn<<"(mb)"<<G4endl;
226	#endif
227	return lastCS*millibarn;
228	}
229
230	// The main member function giving the gamma-A cross section (E in GeV, CS in mb)
231	G4double G4QHyperonPlusNuclearCrossSection::CalculateCrossSection(G4bool, G4int F, G4int I,
232	G4int, G4int targZ, G4int targN, G4double Momentum)
233	{
234	static const G4double THmin=27.; // default minimum Momentum (MeV/c) Threshold
235	static const G4double THmiG=THmin*.001; // minimum Momentum (GeV/c) Threshold
236	static const G4double dP=10.; // step for the LEN (Low ENergy) table MeV/c
237	static const G4double dPG=dP*.001; // step for the LEN (Low ENergy) table GeV/c
238	static const G4int nL=105; // A#of LEN points in E (step 10 MeV/c)
239	static const G4double Pmin=THmin+(nL-1)*dP; // minP for the HighE part with safety
240	static const G4double Pmax=227000.; // maxP for the HEN (High ENergy) part 227 GeV
241	static const G4int nH=224; // A#of HEN points in lnE
242	static const G4double milP=std::log(Pmin);// Low logarithm energy for the HEN part
243	static const G4double malP=std::log(Pmax);// High logarithm energy (each 2.75 percent)
244	static const G4double dlP=(malP-milP)/(nH-1); // Step in log energy in the HEN part
245	static const G4double milPG=std::log(.001*Pmin);// Low logarithmEnergy for HEN part GeV/c
246	#ifdef debug
247	G4cout<<"G4QHyPNuCS::CalCS:N="<<targN<<",Z="<<targZ<<",P="<<Momentum<<">"<<THmin<<G4endl;
248	#endif
249	G4double sigma=0.;
250	if(F&&I) sigma=0.; // @@ ! Fake line ! to use F & I !!!Temporary!!!
251	G4double A=targN+targZ; // A of the target
252	#ifdef debug
253	G4cout<<"G4QHyPNucCS::CalCS: A="<<A<<", F="<<F<<",I="<<I<<",nL="<<nL<<",nH="<<nH<<G4endl;
254	#endif
255	if(F<=0) // This isotope was not the last used isotop
256	{
257	if(F<0) // This isotope was found in DAMDB =======> RETRIEVE
258	{
259	G4int sync=LEN->size();
260	if(sync<=I) G4cerr<<"!G4QPiMinusNuclCS::CalcCrosSect:Sync="<<sync<<"<="<<I<<G4endl;
261	lastLEN=(*LEN)[I]; // Pointer to prepared LowEnergy cross sections
262	lastHEN=(*HEN)[I]; // Pointer to prepared High Energy cross sections
263	}
264	else // This isotope wasn't calculated before => CREATE
265	{
266	lastLEN = new G4double[nL]; // Allocate memory for the new LEN cross sections
267	lastHEN = new G4double[nH]; // Allocate memory for the new HEN cross sections
268	// --- Instead of making a separate function ---
269	G4double P=THmiG; // Table threshold in GeV/c
270	for(G4int m=0; m<nL; m++)
271	{
272	lastLEN[m] = CrossSectionLin(targZ, targN, P);
273	P+=dPG;
274	}
275	G4double lP=milPG;
276	for(G4int n=0; n<nH; n++)
277	{
278	lastHEN[n] = CrossSectionLog(targZ, targN, lP);
279	lP+=dlP;
280	}
281	#ifdef debug
282	G4cout<<"-*->G4QHyPNucCS::CalcCS: Tab for Z="<<targZ<<",N="<<targN<<",I="<<I<<G4endl;
283	#endif
284	// --- End of possible separate function
285	// * The synchronization check *
286	G4int sync=LEN->size();
287	if(sync!=I)
288	{
289	G4cerr<<"***G4QHyPNuclCS::CalcCrossSect: Sinc="<<sync<<"#"<<I<<", Z=" <<targZ
290	<<", N="<<targN<<", F="<<F<<G4endl;
291	//G4Exception("G4PiMinusNuclearCS::CalculateCS:","39",FatalException,"DBoverflow");
292	}
293	LEN->push_back(lastLEN); // remember the Low Energy Table
294	HEN->push_back(lastHEN); // remember the High Energy Table
295	} // End of creation of the new set of parameters
296	} // End of parameters udate
297	// ============================== NOW the Magic Formula =================================
298	#ifdef debug
299	G4cout<<"G4QHyPNCS::CalcCS:lTH="<<lastTH<<",Pi="<<Pmin<<",dP="<<dP<<",dlP="<<dlP<<G4endl;
300	#endif
301	if (Momentum<lastTH) return 0.; // It must be already checked in the interface class
302	else if (Momentum<Pmin) // High Energy region
303	{
304	#ifdef debug
305	G4cout<<"G4QHyPNCS::CalcCS:bLEN A="<<A<<", nL="<<nL<<",TH="<<THmin<<",dP="<<dP<<G4endl;
306	#endif
307	if(A<=1.) sigma=0.;
308	else sigma=EquLinearFit(Momentum,nL,THmin,dP,lastLEN);
309	#ifdef debugn
310	if(sigma<0.)
311	G4cout<<"G4QHyPNuCS::CalcCS:A="<<A<<",E="<<Momentum<<",T="<<THmin<<",d="<<dP<<G4endl;
312	#endif
313	}
314	else if (Momentum<Pmax) // High Energy region
315	{
316	G4double lP=std::log(Momentum);
317	#ifdef debug
318	G4cout<<"G4QHyPNucCS::CalcCS: before HEN nH="<<nH<<", iE="<<milP<<",dlP="<<dlP<<G4endl;
319	#endif
320	sigma=EquLinearFit(lP,nH,milP,dlP,lastHEN);
321	}
322	else // UHE region (calculation, not frequent)
323	{
324	G4double P=0.001*Momentum; // Approximation formula is for P in GeV/c
325	sigma=CrossSectionFormula(targZ, targN, P, std::log(P));
326	}
327	#ifdef debug
328	G4cout<<"G4QHyperonPlusNuclearCrossSection::CalcCS: CS="<<sigma<<G4endl;
329	#endif
330	if(sigma<0.) return 0.;
331	return sigma;
332	}
333
334	// Electromagnetic momentum-threshold (in MeV/c)
335	G4double G4QHyperonPlusNuclearCrossSection::ThresholdMomentum(G4int tZ, G4int tN)
336	{
337	static const G4double third=1./3.;
338	static const G4double prM = G4QPDGCode(2212).GetMass(); // Proton mass in MeV
339	static const G4double pM = G4QPDGCode(3112).GetMass(); // Projectile mass in MeV
340	static const G4double tpM= pM+pM; // Doubled projectile mass (MeV)
341	G4double tA=tZ+tN;
342	if(tZ<.99 \|\| tN<0.) return 0.;
343	G4double tM=931.5*tA;
344	G4double dE=65.88; // M_SigmaPlus-M_Lambda-M_PiPlus
345	if(tZ==1 && tN==0) tM=prM; // A threshold on the free proton
346	else dE=tZ/(1.+std::pow(tA,third)); // Safety for diffused edge of the nucleus (QE)
347	//G4double dE=1.263*tZ/(1.+std::pow(tA,third));
348	G4double T=dE+dE*(dE/2+pM)/tM;
349	return std::sqrt(T*(tpM+T));
350	}
351
352	// Calculation formula for piMinus-nuclear inelastic cross-section (mb) (P in GeV/c)
353	G4double G4QHyperonPlusNuclearCrossSection::CrossSectionLin(G4int tZ, G4int tN, G4double P)
354	{
355	G4double lP=std::log(P);
356	return CrossSectionFormula(tZ, tN, P, lP);
357	}
358
359	// Calculation formula for piMinus-nuclear inelastic cross-section (mb) log(P in GeV/c)
360	G4double G4QHyperonPlusNuclearCrossSection::CrossSectionLog(G4int tZ, G4int tN,G4double lP)
361	{
362	G4double P=std::exp(lP);
363	return CrossSectionFormula(tZ, tN, P, lP);
364	}
365	// Calculation formula for piMinus-nuclear inelastic cross-section (mb) log(P in GeV/c)
366	G4double G4QHyperonPlusNuclearCrossSection::CrossSectionFormula(G4int tZ, G4int tN,
367	G4double P, G4double lP)
368	{
369	G4double sigma=0.;
370	if(tZ==1 && !tN) // SigmaPlus-P interaction from G4QuasiElRatios
371	{
372	G4double ld=lP-3.5;
373	G4double ld2=ld*ld;
374	G4double p2=P*P;
375	G4double p4=p2*p2;
376	G4double sp=std::sqrt(P);
377	G4double El=(.0557*ld2+6.72+99./p2)/(1.+2./sp+2./p4);
378	G4double To=(.3*ld2+38.2+900./sp)/(1.+27./sp+3./p4);
379	sigma=To-El;
380	}
381	else if(tZ<97 && tN<152) // General solution
382	{
383	G4double d=lP-4.2;
384	G4double p2=P*P;
385	G4double p4=p2*p2;
386	G4double sp=std::sqrt(P);
387	G4double ssp=std::sqrt(sp);
388	G4double a=tN+tZ; // A of the target
389	G4double al=std::log(a);
390	G4double sa=std::sqrt(a);
391	G4double a2=a*a;
392	G4double a2s=a2*sa;
393	G4double a4=a2*a2;
394	G4double a8=a4*a4;
395	G4double c=(170.+3600./a2s)/(1.+65./a2s);
396	G4double g=40.std::exp(al0.712)/(1.+12.2/a)/(1.+34./a2);
397	G4double e=700.; // Defolt values for deutrons
398	G4double r=0.27;
399	G4double h=3.E-7;
400	G4double t=0.3;
401	if(tZ>1 \|\| tN>1)
402	{
403	e=99.+146.a2/(1.+a2/12.)/(1.+2.E-19a8);
404	r=0.15;
405	h=(.0017+.2E-9a4sa)/a2/a;
406	t=(.2+.00056a2)/(1.+a2.0006);
407	}
408	sigma=(c+dd)/(1.+t/ssp+r/p4)+(g+estd::exp(-6.*P))/(1.+h/p4/p4);
409	#ifdef pdebug
410	G4cout<<"G4QHyperPlusNucCS::CSForm: A="<<a<<",P="<<P<<",CS="<<sigma<<",c="<<c<<",g="<<g
411	<<",d="<<d<<",r="<<r<<",e="<<e<<",h="<<h<<G4endl;
412	#endif
413	}
414	else
415	{
416	G4cerr<<"-Warning-G4QHyperPlNuclearCroSect::CSForm:Bad A Z="<<tZ<<", N="<<tN<<G4endl;
417	sigma=0.;
418	}
419	if(sigma<0.) return 0.;
420	return sigma;
421	}

Note: See TracBrowser for help on using the repository browser.

Download in other formats: