Geant4 9.6.0
Toolkit for the simulation of the passage of particles through matter
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G4QHyperonNuclearCrossSection.cc
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25//
26//
27// The lust update: M.V. Kossov, CERN/ITEP(Moscow) 17-June-02
28// GEANT4 tag $Name: not supported by cvs2svn $
29//
30//
31// G4 Physics class: G4QHyperonNuclearCrossSection 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 part of the CHIPS physics package (author: M. Kosov)
37// ****************************************************************************************
38// Short description: CHIPS cross-sections for Hyperon(minus&neutral)-nuclear interactions
39// -------------------------------------------------------------------------------------
40//
41//#define debug
42//#define pdebug
43//#define debug3
44//#define debugn
45//#define debugs
46
47#include "G4QHyperonNuclearCrossSection.hh"
48#include "G4SystemOfUnits.hh"
49
50// Initialization of the
51G4double* G4QHyperonNuclearCrossSection::lastLEN=0; // Pointer to the lastArray of LowEn CS
52G4double* G4QHyperonNuclearCrossSection::lastHEN=0; // Pointer to the lastArray of HighEn CS
53G4int G4QHyperonNuclearCrossSection::lastN=0; // The last N of calculated nucleus
54G4int G4QHyperonNuclearCrossSection::lastZ=0; // The last Z of calculated nucleus
55G4double G4QHyperonNuclearCrossSection::lastP=0.; // Last used in cross section Momentum
56G4double G4QHyperonNuclearCrossSection::lastTH=0.; // Last threshold momentum
57G4double G4QHyperonNuclearCrossSection::lastCS=0.; // Last value of the Cross Section
58G4int G4QHyperonNuclearCrossSection::lastI=0; // The last position in the DAMDB
59std::vector<G4double*>* G4QHyperonNuclearCrossSection::LEN = new std::vector<G4double*>;
60std::vector<G4double*>* G4QHyperonNuclearCrossSection::HEN = new std::vector<G4double*>;
61
62// Returns Pointer to the G4VQCrossSection class
63G4VQCrossSection* G4QHyperonNuclearCrossSection::GetPointer()
64{
65 static G4QHyperonNuclearCrossSection theCrossSection; //**Static body of Cross Section**
66 return &theCrossSection;
67}
68
69G4QHyperonNuclearCrossSection::~G4QHyperonNuclearCrossSection()
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)
81G4double G4QHyperonNuclearCrossSection::GetCrossSection(G4bool fCS, G4double pMom,
82 G4int tgZ, G4int tgN, G4int PDG)
83{
84 //A.R.23-Oct-2012 Shadowed variable 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<<"G4QHyCS::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!=3122 && PDG!=3212 && PDG!=3112 && PDG!=3322 && PDG!=3312 && PDG!=3334)
97 G4cout<<"-Warning-G4QHyperonCS::GetCS:Not a Zero or Negative Hyperon,PDG="<<PDG<<G4endl;
98 G4bool in=false; // By default the isotope must be found in the AMDB
99 if(tgN!=lastN || tgZ!=lastZ) // The nucleus was not the last used isotope
100 {
101 in = false; // By default the isotope haven't be found in AMDB
102 lastP = 0.; // New momentum history (nothing to compare with)
103 lastN = tgN; // The last N of the calculated nucleus
104 lastZ = tgZ; // The last Z of the calculated nucleus
105 lastI = colN.size(); // Size of the Associative Memory DB in the heap
106 j = 0; // A#0f records found in DB for this projectile
107#ifdef debug
108 G4cout<<"G4QHyCS::GetCS: the amount of records in the AMDB lastI="<<lastI<<G4endl;
109#endif
110 if(lastI) for(G4int i=0; i<lastI; i++) // AMDB exists, try to find the (Z,N) isotope
111 {
112 if(colN[i]==tgN && colZ[i]==tgZ) // Try the record "i" in the AMDB
113 {
114 lastI=i; // Remember the index for future fast/last use
115 lastTH =colTH[i]; // The last THreshold (A-dependent)
116#ifdef debug
117 G4cout<<"G4QHyCS::GetCS:*Found* P="<<pMom<<",Threshold="<<lastTH<<",j="<<j<<G4endl;
118#endif
119 if(pMom<=lastTH)
120 {
121#ifdef debug
122 G4cout<<"G4QPCS::GetCS:Found,P="<<pMom<<" < Threshold="<<lastTH<<",CS=0"<<G4endl;
123#endif
124 return 0.; // Energy is below the Threshold value
125 }
126 lastP =colP [i]; // Last Momentum (A-dependent)
127 lastCS =colCS[i]; // Last CrossSect (A-dependent)
128 if(std::fabs(lastP-pMom)<tolerance*pMom)
129 //if(lastP==pMom) // VI do not use tolerance
130 {
131#ifdef debug
132 G4cout<<"..G4QHyCS::GetCS:.DoNothing.P="<<pMom<<",CS="<<lastCS*millibarn<<G4endl;
133#endif
134 //CalculateCrossSection(fCS,-1,j,PDG,lastZ,lastN,pMom); // Update param's only
135 return lastCS*millibarn; // Use theLastCS
136 }
137 in = true; // This is the case when the isotop is found in DB
138 // Momentum pMom is in IU ! @@ Units
139#ifdef debug
140 G4cout<<"G4QHyCS::G:UpdatDB P="<<pMom<<",f="<<fCS<<",lI="<<lastI<<",j="<<j<<G4endl;
141#endif
142 lastCS=CalculateCrossSection(fCS,-1,j,PDG,lastZ,lastN,pMom); // read & update
143#ifdef debug
144 G4cout<<"G4QHyCS::GetCrosSec: *****> New (inDB) Calculated CS="<<lastCS<<G4endl;
145#endif
146 if(lastCS<=0. && pMom>lastTH) // Correct the threshold (@@ No intermediate Zeros)
147 {
148#ifdef debug
149 G4cout<<"G4QHyCS::GetCS: New P="<<pMom<<"(CS=0) > Threshold="<<lastTH<<G4endl;
150#endif
151 lastCS=0.;
152 lastTH=pMom;
153 }
154 break; // Go out of the LOOP
155 }
156#ifdef debug
157 G4cout<<"-->G4QHyCrossSec::GetCrosSec: pPDG="<<PDG<<", j="<<j<<", N="<<colN[i]
158 <<",Z["<<i<<"]="<<colZ[i]<<G4endl;
159#endif
160 j++; // Increment a#0f records found in DB
161 }
162#ifdef debug
163 G4cout<<"-?-G4QHyCS::GetCS:RC Z="<<tgZ<<",N="<<tgN<<",in="<<in<<",j="<<j<<" ?"<<G4endl;
164#endif
165 if(!in) // This isotope has not been calculated previously
166 {
167#ifdef debug
168 G4cout<<"^^^G4QHyCS::GetCS:CalcNew P="<<pMom<<", f="<<fCS<<", lastI="<<lastI<<G4endl;
169#endif
170 //!!The slave functions must provide cross-sections in millibarns (mb) !! (not in IU)
171 lastCS=CalculateCrossSection(fCS,0,j,PDG,lastZ,lastN,pMom); //calculate & create
172 //if(lastCS>0.) // It means that the AMBD was initialized
173 //{
174
175 lastTH = ThresholdEnergy(tgZ, tgN); // The Threshold Energy which is now the last
176#ifdef debug
177 G4cout<<"G4QHyCrossSection::GetCrossSect: NewThresh="<<lastTH<<",P="<<pMom<<G4endl;
178#endif
179 colN.push_back(tgN);
180 colZ.push_back(tgZ);
181 colP.push_back(pMom);
182 colTH.push_back(lastTH);
183 colCS.push_back(lastCS);
184#ifdef debug
185 G4cout<<"G4QHyCS::GetCrosSec:recCS="<<lastCS<<",lZ="<<lastN<<",lN="<<lastZ<<G4endl;
186#endif
187 //} // M.K. Presence of H1 with high threshold breaks the syncronization
188#ifdef pdebug
189 G4cout<<"G4QHyCS::GetCS:1st,P="<<pMom<<"(MeV),CS="<<lastCS*millibarn<<"(mb)"<<G4endl;
190#endif
191 return lastCS*millibarn;
192 } // End of creation of the new set of parameters
193 else
194 {
195#ifdef debug
196 G4cout<<"G4QHyCS::GetCS: Update lastI="<<lastI<<",j="<<j<<G4endl;
197#endif
198 colP[lastI]=pMom;
199 colCS[lastI]=lastCS;
200 }
201 } // End of parameters udate
202 else if(pMom<=lastTH)
203 {
204#ifdef debug
205 G4cout<<"G4QHyCS::GetCS: Current P="<<pMom<<" < Threshold="<<lastTH<<", CS=0"<<G4endl;
206#endif
207 return 0.; // Momentum is below the Threshold Value -> CS=0
208 }
209 else if(std::fabs(lastP-pMom)<tolerance*pMom)
210 //else if(lastP==pMom) // VI do not use tolerance
211 {
212#ifdef debug
213 G4cout<<".G4QHyCS::GetCS:OldNZ&P="<<lastP<<"="<<pMom<<",CS="<<lastCS*millibarn<<G4endl;
214#endif
215 return lastCS*millibarn; // Use theLastCS
216 }
217 else // It is the last used -> use the current tables
218 {
219#ifdef debug
220 G4cout<<"!-G4QHyCS::GetCS:UseCur P="<<pMom<<",f="<<fCS<<",I="<<lastI<<",j="<<j<<G4endl;
221#endif
222 lastCS=CalculateCrossSection(fCS,1,j,PDG,lastZ,lastN,pMom); // Only read and UpdateDB
223 lastP=pMom;
224 }
225#ifdef debug
226 G4cout<<"==>G4QHyCS::GetCroSec: P="<<pMom<<"(MeV),CS="<<lastCS*millibarn<<"(mb)"<<G4endl;
227#endif
228 return lastCS*millibarn;
229}
230
231// The main member function giving the gamma-A cross section (E in GeV, CS in mb)
232G4double G4QHyperonNuclearCrossSection::CalculateCrossSection(G4bool, G4int F, G4int I,
233 G4int, G4int targZ, G4int targN, G4double Momentum)
234{
235 static const G4double THmin=27.; // default minimum Momentum (MeV/c) Threshold
236 static const G4double THmiG=THmin*.001; // minimum Momentum (GeV/c) Threshold
237 static const G4double dP=10.; // step for the LEN (Low ENergy) table MeV/c
238 static const G4double dPG=dP*.001; // step for the LEN (Low ENergy) table GeV/c
239 static const G4int nL=105; // A#of LEN points in E (step 10 MeV/c)
240 static const G4double Pmin=THmin+(nL-1)*dP; // minP for the HighE part with safety
241 static const G4double Pmax=227000.; // maxP for the HEN (High ENergy) part 227 GeV
242 static const G4int nH=224; // A#of HEN points in lnE
243 static const G4double milP=std::log(Pmin);// Low logarithm energy for the HEN part
244 static const G4double malP=std::log(Pmax);// High logarithm energy (each 2.75 percent)
245 static const G4double dlP=(malP-milP)/(nH-1); // Step in log energy in the HEN part
246 static const G4double milPG=std::log(.001*Pmin);// Low logarithmEnergy for HEN part GeV/c
247#ifdef debug
248 G4cout<<"G4QHyNucCS::CalCS:N="<<targN<<",Z="<<targZ<<",P="<<Momentum<<">"<<THmin<<G4endl;
249#endif
250 G4double sigma=0.;
251 if(F&&I) sigma=0.; // @@ *!* Fake line *!* to use F & I !!!Temporary!!!
252 //G4double A=targN+targZ; // A of the target
253#ifdef debug
254 G4cout<<"G4QHypNucCS::CalCS: A="<<A<<", F="<<F<<",I="<<I<<",nL="<<nL<<",nH="<<nH<<G4endl;
255#endif
256 if(F<=0) // This isotope was not the last used isotop
257 {
258 if(F<0) // This isotope was found in DAMDB =-----=> RETRIEVE
259 {
260 G4int sync=LEN->size();
261 if(sync<=I) G4cerr<<"*!*G4QPiMinusNuclCS::CalcCrosSect:Sync="<<sync<<"<="<<I<<G4endl;
262 lastLEN=(*LEN)[I]; // Pointer to prepared LowEnergy cross sections
263 lastHEN=(*HEN)[I]; // Pointer to prepared High Energy cross sections
264 }
265 else // This isotope wasn't calculated before => CREATE
266 {
267 lastLEN = new G4double[nL]; // Allocate memory for the new LEN cross sections
268 lastHEN = new G4double[nH]; // Allocate memory for the new HEN cross sections
269 // --- Instead of making a separate function ---
270 G4double P=THmiG; // Table threshold in GeV/c
271 for(G4int n=0; n<nL; n++)
272 {
273 lastLEN[n] = CrossSectionLin(targZ, targN, P);
274 P+=dPG;
275 }
276 G4double lP=milPG;
277 for(G4int n=0; n<nH; n++)
278 {
279 lastHEN[n] = CrossSectionLog(targZ, targN, lP);
280 lP+=dlP;
281 }
282#ifdef debug
283 G4cout<<"-*->G4QHypNucCS::CalcCS:Tab for Z="<<targZ<<", N="<<targN<<",I="<<I<<G4endl;
284#endif
285 // --- End of possible separate function
286 // *** The synchronization check ***
287 G4int sync=LEN->size();
288 if(sync!=I)
289 {
290 G4cerr<<"***G4QHyperNuclCS::CalcCrossSect: Sinc="<<sync<<"#"<<I<<", Z=" <<targZ
291 <<", N="<<targN<<", F="<<F<<G4endl;
292 //G4Exception("G4PiMinusNuclearCS::CalculateCS:","39",FatalException,"DBoverflow");
293 }
294 LEN->push_back(lastLEN); // remember the Low Energy Table
295 HEN->push_back(lastHEN); // remember the High Energy Table
296 } // End of creation of the new set of parameters
297 } // End of parameters udate
298 // =--------------------------= NOW the Magic Formula =------------------------------=
299#ifdef debug
300 G4cout<<"G4QHyNCS::CalcCS:lTH="<<lastTH<<",Pmi="<<Pmin<<",dP="<<dP<<",dlP="<<dlP<<G4endl;
301#endif
302 if (Momentum<lastTH) return 0.; // It must be already checked in the interface class
303 else if (Momentum<Pmin) // High Energy region
304 {
305#ifdef debug
306 G4cout<<"G4QHyNCS::CalcCS:bLEN nL="<<nL<<",TH="<<THmin<<",dP="<<dP<<G4endl;
307#endif
308 sigma=EquLinearFit(Momentum,nL,THmin,dP,lastLEN);
309#ifdef debugn
310 if(sigma<0.)
311 G4cout<<"G4QHyNuCS::CalcCS: E="<<Momentum<<",T="<<THmin<<",dP="<<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<<"G4QHyNucCS::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<<"G4QHyperonNuclearCrossSection::CalcCS: CS="<<sigma<<G4endl;
329#endif
330 if(sigma<0.) return 0.;
331 return sigma;
332}
333
334// Calculation formula for piMinus-nuclear inelastic cross-section (mb) (P in GeV/c)
335G4double G4QHyperonNuclearCrossSection::CrossSectionLin(G4int tZ, G4int tN, G4double P)
336{
337 G4double lP=std::log(P);
338 return CrossSectionFormula(tZ, tN, P, lP);
339}
340
341// Calculation formula for piMinus-nuclear inelastic cross-section (mb) log(P in GeV/c)
342G4double G4QHyperonNuclearCrossSection::CrossSectionLog(G4int tZ, G4int tN, G4double lP)
343{
344 G4double P=std::exp(lP);
345 return CrossSectionFormula(tZ, tN, P, lP);
346}
347// Calculation formula for piMinus-nuclear inelastic cross-section (mb) log(P in GeV/c)
348G4double G4QHyperonNuclearCrossSection::CrossSectionFormula(G4int tZ, G4int tN,
349 G4double P, G4double lP)
350{
351 G4double sigma=0.;
352 if(tZ==1 && !tN) // Hyperon-P interaction from G4QuasiElastRatios
353 {
354 G4double ld=lP-3.5;
355 G4double ld2=ld*ld;
356 G4double p2=P*P;
357 G4double p4=p2*p2;
358 G4double sp=std::sqrt(P);
359 G4double El=(.0557*ld2+6.72+99./p2)/(1.+2./sp+2./p4);
360 G4double To=(.3*ld2+38.2+900./sp)/(1.+27./sp+3./p4);
361 sigma=To-El;
362 }
363 else if(tZ<97 && tN<152) // General solution
364 {
365 G4double d=lP-4.2;
366 G4double p2=P*P;
367 G4double p4=p2*p2;
368 G4double sp=std::sqrt(P);
369 G4double ssp=std::sqrt(sp);
370 G4double a=tN+tZ; // A of the target
371 G4double al=std::log(a);
372 G4double sa=std::sqrt(a);
373 G4double a2=a*a;
374 G4double a2s=a2*sa;
375 G4double a4=a2*a2;
376 G4double a8=a4*a4;
377 G4double c=(170.+3600./a2s)/(1.+65./a2s);
378 G4double g_value=42.*(std::exp(al*0.8)+4.E-8*a4)/(1.+28./a)/(1.+5.E-5*a2);
379 G4double e=390.; // Defolt values for deutrons
380 G4double r=0.27;
381 G4double h=2.E-7;
382 G4double t=0.3;
383 if(tZ>1 || tN>1)
384 {
385 e=380.+18.*a2/(1.+a2/60.)/(1.+2.E-19*a8);
386 r=0.15;
387 h=1.E-8*a2/(1.+a2/17.)/(1.+3.E-20*a8);
388 t=(.2+.00056*a2)/(1.+a2*.0006);
389 }
390 sigma=(c+d*d)/(1.+t/ssp+r/p4)+(g_value+e*std::exp(-6.*P))/(1.+h/p4/p4);
391#ifdef pdebug
392 G4cout<<"G4QHyperonNucCS::CSForm: A="<<a<<",P="<<P<<",CS="<<sigma<<",c="<<c<<",g="<<g_value
393 <<",d="<<d<<",r="<<r<<",e="<<e<<",h="<<h<<G4endl;
394#endif
395 }
396 else
397 {
398 G4cerr<<"-Warning-G4QHyperonNuclearCroSect::CSForm:*Bad A* Z="<<tZ<<", N="<<tN<<G4endl;
399 sigma=0.;
400 }
401 if(sigma<0.) return 0.;
402 return sigma;
403}
G4double
double G4double
Definition: G4Types.hh:64
G4int
int G4int
Definition: G4Types.hh:66
G4bool
bool G4bool
Definition: G4Types.hh:67
G4endl
#define G4endl
Definition: G4ios.hh:52
G4cerr
G4DLLIMPORT std::ostream G4cerr
G4cout
G4DLLIMPORT std::ostream G4cout
G4QHyperonNuclearCrossSection::CalculateCrossSection
G4double CalculateCrossSection(G4bool CS, G4int F, G4int I, G4int PDG, G4int Z, G4int N, G4double Momentum)
Definition: G4QHyperonNuclearCrossSection.cc:232
G4QHyperonNuclearCrossSection::GetCrossSection
virtual G4double GetCrossSection(G4bool fCS, G4double pMom, G4int tgZ, G4int tgN, G4int pPDG=3122)
Definition: G4QHyperonNuclearCrossSection.cc:81
G4VQCrossSection::EquLinearFit
G4double EquLinearFit(G4double X, G4int N, G4double X0, G4double DX, G4double *Y)
Definition: G4VQCrossSection.cc:94
G4VQCrossSection::ThresholdEnergy
virtual G4double ThresholdEnergy(G4int Z, G4int N, G4int PDG=0)
Definition: G4VQCrossSection.cc:54
G4VQCrossSection::tolerance
static G4double tolerance
Definition: G4VQCrossSection.hh:175