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26 // 26 //
27 // The lust update: M.V. Kossov, CERN/ITEP(Mos 27 // The lust update: M.V. Kossov, CERN/ITEP(Moscow) 17-June-02
28 // 28 //
29 // 29 //
30 // G4 Physics class: G4ChipsPionMinusInelastic 30 // G4 Physics class: G4ChipsPionMinusInelasticXS for gamma+A cross sections
31 // Created: M.V. Kossov, CERN/ITEP(Moscow), 20 31 // Created: M.V. Kossov, CERN/ITEP(Moscow), 20-Dec-03
32 // The last update: M.V. Kossov, CERN/ITEP (Mo 32 // The last update: M.V. Kossov, CERN/ITEP (Moscow) 15-Feb-04
33 // 33 //
34 // ------------------------------------------- 34 // -------------------------------------------------------------------------------------
35 // Short description: Cross-sections extracted 35 // Short description: Cross-sections extracted (by W.Pokorski) from the CHIPS package for
36 // pion interactions. Original author: M. Koss 36 // pion interactions. Original author: M. Kossov
37 // ------------------------------------------- 37 // -------------------------------------------------------------------------------------
38 // 38 //
39 39
40 #include "G4ChipsPionMinusInelasticXS.hh" 40 #include "G4ChipsPionMinusInelasticXS.hh"
41 #include "G4ChipsPionPlusInelasticXS.hh" 41 #include "G4ChipsPionPlusInelasticXS.hh"
42 #include "G4SystemOfUnits.hh" 42 #include "G4SystemOfUnits.hh"
43 #include "G4DynamicParticle.hh" 43 #include "G4DynamicParticle.hh"
44 #include "G4ParticleDefinition.hh" 44 #include "G4ParticleDefinition.hh"
45 #include "G4PionMinus.hh" 45 #include "G4PionMinus.hh"
46 46
47 #include "G4Log.hh" 47 #include "G4Log.hh"
48 #include "G4Exp.hh" 48 #include "G4Exp.hh"
49 49
50 // factory 50 // factory
51 #include "G4CrossSectionFactory.hh" 51 #include "G4CrossSectionFactory.hh"
52 // 52 //
53 G4_DECLARE_XS_FACTORY(G4ChipsPionMinusInelasti 53 G4_DECLARE_XS_FACTORY(G4ChipsPionMinusInelasticXS);
54 54
55 G4ChipsPionMinusInelasticXS::G4ChipsPionMinusI 55 G4ChipsPionMinusInelasticXS::G4ChipsPionMinusInelasticXS():G4VCrossSectionDataSet("ChipsPionMinusInelasticXS")
56 { 56 {
57 // Initialization of the 57 // Initialization of the
58 lastLEN=0; // Pointer to lastArray of LowEn 58 lastLEN=0; // Pointer to lastArray of LowEn CS
59 lastHEN=0; // Pointer to lastArray of HighEn 59 lastHEN=0; // Pointer to lastArray of HighEn CS
60 lastN=0; // The last N of calculated nucle 60 lastN=0; // The last N of calculated nucleus
61 lastZ=0; // The last Z of calculated nucle 61 lastZ=0; // The last Z of calculated nucleus
62 lastP=0.; // Last used cross section Moment 62 lastP=0.; // Last used cross section Momentum
63 lastTH=0.; // Last threshold momentum 63 lastTH=0.; // Last threshold momentum
64 lastCS=0.; // Last value of the Cross Sectio 64 lastCS=0.; // Last value of the Cross Section
65 lastI=0; // The last position in the DAMDB 65 lastI=0; // The last position in the DAMDB
66 LEN = new std::vector<G4double*>; 66 LEN = new std::vector<G4double*>;
67 HEN = new std::vector<G4double*>; 67 HEN = new std::vector<G4double*>;
68 } 68 }
69 69
70 G4ChipsPionMinusInelasticXS::~G4ChipsPionMinus 70 G4ChipsPionMinusInelasticXS::~G4ChipsPionMinusInelasticXS()
71 { 71 {
72 std::size_t lens=LEN->size(); 72 std::size_t lens=LEN->size();
73 for(std::size_t i=0; i<lens; ++i) delete[] ( 73 for(std::size_t i=0; i<lens; ++i) delete[] (*LEN)[i];
74 delete LEN; 74 delete LEN;
75 std::size_t hens=HEN->size(); 75 std::size_t hens=HEN->size();
76 for(std::size_t i=0; i<hens; ++i) delete[] ( 76 for(std::size_t i=0; i<hens; ++i) delete[] (*HEN)[i];
77 delete HEN; 77 delete HEN;
78 } 78 }
79 79
80 void 80 void
81 G4ChipsPionMinusInelasticXS::CrossSectionDescr 81 G4ChipsPionMinusInelasticXS::CrossSectionDescription(std::ostream& outFile) const
82 { 82 {
83 outFile << "G4ChipsPionMinusInelasticXS pr 83 outFile << "G4ChipsPionMinusInelasticXS provides the inelastic cross\n"
84 << "section for pion- nucleus scat 84 << "section for pion- nucleus scattering as a function of incident\n"
85 << "momentum. The cross section is 85 << "momentum. The cross section is calculated using M. Kossov's\n"
86 << "CHIPS parameterization of cros 86 << "CHIPS parameterization of cross section data.\n";
87 } 87 }
88 88
89 G4bool G4ChipsPionMinusInelasticXS::IsIsoAppli 89 G4bool G4ChipsPionMinusInelasticXS::IsIsoApplicable(const G4DynamicParticle*, G4int, G4int,
90 const G4Element*, 90 const G4Element*,
91 const G4Material*) 91 const G4Material*)
92 { 92 {
93 return true; 93 return true;
94 } 94 }
95 95
96 // The main member function giving the collisi 96 // The main member function giving the collision cross section (P is in IU, CS is in mb)
97 // Make pMom in independent units ! (Now it is 97 // Make pMom in independent units ! (Now it is MeV)
98 G4double G4ChipsPionMinusInelasticXS::GetIsoCr 98 G4double G4ChipsPionMinusInelasticXS::GetIsoCrossSection(const G4DynamicParticle* Pt, G4int tgZ, G4int A,
99 const G4Isotope*, 99 const G4Isotope*,
100 const G4Element*, 100 const G4Element*,
101 const G4Material*) 101 const G4Material*)
102 { 102 {
103 G4double pMom=Pt->GetTotalMomentum(); 103 G4double pMom=Pt->GetTotalMomentum();
104 G4int tgN = A - tgZ; 104 G4int tgN = A - tgZ;
105 105
106 return GetChipsCrossSection(pMom, tgZ, tgN, 106 return GetChipsCrossSection(pMom, tgZ, tgN, -211);
107 } 107 }
108 108
109 G4double G4ChipsPionMinusInelasticXS::GetChips 109 G4double G4ChipsPionMinusInelasticXS::GetChipsCrossSection(G4double pMom, G4int tgZ, G4int tgN, G4int)
110 { 110 {
111 111
112 G4bool in=false; // By d 112 G4bool in=false; // By default the isotope must be found in the AMDB
113 if(tgN!=lastN || tgZ!=lastZ) // The 113 if(tgN!=lastN || tgZ!=lastZ) // The nucleus was not the last used isotope
114 { 114 {
115 in = false; // By d 115 in = false; // By default the isotope haven't be found in AMDB
116 lastP = 0.; // New 116 lastP = 0.; // New momentum history (nothing to compare with)
117 lastN = tgN; // The 117 lastN = tgN; // The last N of the calculated nucleus
118 lastZ = tgZ; // The 118 lastZ = tgZ; // The last Z of the calculated nucleus
119 lastI = (G4int)colN.size(); // Size 119 lastI = (G4int)colN.size(); // Size of the Associative Memory DB in the heap
120 j = 0; // A#0f 120 j = 0; // A#0f records found in DB for this projectile
121 if(lastI) for(G4int i=0; i<lastI; ++i) // 121 if(lastI) for(G4int i=0; i<lastI; ++i) // AMDB exists, try to find the (Z,N) isotope
122 { 122 {
123 if(colN[i]==tgN && colZ[i]==tgZ) // Try 123 if(colN[i]==tgN && colZ[i]==tgZ) // Try the record "i" in the AMDB
124 { 124 {
125 lastI=i; // Reme 125 lastI=i; // Remember the index for future fast/last use
126 lastTH =colTH[i]; // The 126 lastTH =colTH[i]; // The last THreshold (A-dependent)
127 if(pMom<=lastTH) 127 if(pMom<=lastTH)
128 { 128 {
129 return 0.; // Ener 129 return 0.; // Energy is below the Threshold value
130 } 130 }
131 lastP =colP [i]; // Last 131 lastP =colP [i]; // Last Momentum (A-dependent)
132 lastCS =colCS[i]; // Last 132 lastCS =colCS[i]; // Last CrossSect (A-dependent)
133 in = true; // This 133 in = true; // This is the case when the isotop is found in DB
134 // Momentum pMom is in IU ! @@ Units 134 // Momentum pMom is in IU ! @@ Units
135 lastCS=CalculateCrossSection(-1,j,-211 135 lastCS=CalculateCrossSection(-1,j,-211,lastZ,lastN,pMom); // read & update
136 if(lastCS<=0. && pMom>lastTH) // Corr 136 if(lastCS<=0. && pMom>lastTH) // Correct the threshold (@@ No intermediate Zeros)
137 { 137 {
138 lastCS=0.; 138 lastCS=0.;
139 lastTH=pMom; 139 lastTH=pMom;
140 } 140 }
141 break; // Go o 141 break; // Go out of the LOOP
142 } 142 }
143 j++; // Incr 143 j++; // Increment a#0f records found in DB
144 } 144 }
145 if(!in) // This 145 if(!in) // This isotope has not been calculated previously
146 { 146 {
147 //!!The slave functions must provide cro 147 //!!The slave functions must provide cross-sections in millibarns (mb) !! (not in IU)
148 lastCS=CalculateCrossSection(0,j,-211,la 148 lastCS=CalculateCrossSection(0,j,-211,lastZ,lastN,pMom); //calculate & create
149 //if(lastCS>0.) // It 149 //if(lastCS>0.) // It means that the AMBD was initialized
150 //{ 150 //{
151 151
152 lastTH = 0; //ThresholdEnergy(tgZ, tgN); 152 lastTH = 0; //ThresholdEnergy(tgZ, tgN); // The Threshold Energy which is now the last
153 colN.push_back(tgN); 153 colN.push_back(tgN);
154 colZ.push_back(tgZ); 154 colZ.push_back(tgZ);
155 colP.push_back(pMom); 155 colP.push_back(pMom);
156 colTH.push_back(lastTH); 156 colTH.push_back(lastTH);
157 colCS.push_back(lastCS); 157 colCS.push_back(lastCS);
158 //} // M.K. Presence of H1 with high thr 158 //} // M.K. Presence of H1 with high threshold breaks the syncronization
159 return lastCS*millibarn; 159 return lastCS*millibarn;
160 } // End of creation of the new set of par 160 } // End of creation of the new set of parameters
161 else 161 else
162 { 162 {
163 colP[lastI]=pMom; 163 colP[lastI]=pMom;
164 colCS[lastI]=lastCS; 164 colCS[lastI]=lastCS;
165 } 165 }
166 } // End of parameters udate 166 } // End of parameters udate
167 else if(pMom<=lastTH) 167 else if(pMom<=lastTH)
168 { 168 {
169 return 0.; // Mome 169 return 0.; // Momentum is below the Threshold Value -> CS=0
170 } 170 }
171 else // It i 171 else // It is the last used -> use the current tables
172 { 172 {
173 lastCS=CalculateCrossSection(1,j,-211,last 173 lastCS=CalculateCrossSection(1,j,-211,lastZ,lastN,pMom); // Only read and UpdateDB
174 lastP=pMom; 174 lastP=pMom;
175 } 175 }
176 return lastCS*millibarn; 176 return lastCS*millibarn;
177 } 177 }
178 178
179 // The main member function giving the gamma-A 179 // The main member function giving the gamma-A cross section (E in GeV, CS in mb)
180 G4double G4ChipsPionMinusInelasticXS::Calculat 180 G4double G4ChipsPionMinusInelasticXS::CalculateCrossSection(G4int F, G4int I,
181 G4int, 181 G4int, G4int targZ, G4int targN, G4double Momentum)
182 { 182 {
183 static const G4double THmin=27.; // defa 183 static const G4double THmin=27.; // default minimum Momentum (MeV/c) Threshold
184 static const G4double THmiG=THmin*.001; // m 184 static const G4double THmiG=THmin*.001; // minimum Momentum (GeV/c) Threshold
185 static const G4double dP=10.; // step 185 static const G4double dP=10.; // step for the LEN (Low ENergy) table MeV/c
186 static const G4double dPG=dP*.001; // step 186 static const G4double dPG=dP*.001; // step for the LEN (Low ENergy) table GeV/c
187 static const G4int nL=105; // A#of 187 static const G4int nL=105; // A#of LEN points in E (step 10 MeV/c)
188 static const G4double Pmin=THmin+(nL-1)*dP; 188 static const G4double Pmin=THmin+(nL-1)*dP; // minP for the HighE part with safety
189 static const G4double Pmax=227000.; // maxP 189 static const G4double Pmax=227000.; // maxP for the HEN (High ENergy) part 227 GeV
190 static const G4int nH=224; // A#of 190 static const G4int nH=224; // A#of HEN points in lnE
191 static const G4double milP=G4Log(Pmin);// Lo 191 static const G4double milP=G4Log(Pmin);// Low logarithm energy for the HEN part
192 static const G4double malP=G4Log(Pmax);// Hi 192 static const G4double malP=G4Log(Pmax);// High logarithm energy (each 2.75 percent)
193 static const G4double dlP=(malP-milP)/(nH-1) 193 static const G4double dlP=(malP-milP)/(nH-1); // Step in log energy in the HEN part
194 static const G4double milPG=G4Log(.001*Pmin) 194 static const G4double milPG=G4Log(.001*Pmin);// Low logarithmEnergy for HEN part GeV/c
>> 195 G4double sigma=0.;
>> 196 if(F&&I) sigma=0.; // @@ *!* Fake line *!* to use F & I !!!Temporary!!!
>> 197 //G4double A=targN+targZ; // A of the target
195 if(F<=0) // This 198 if(F<=0) // This isotope was not the last used isotop
196 { 199 {
197 if(F<0) // This 200 if(F<0) // This isotope was found in DAMDB =-----=> RETRIEVE
198 { 201 {
199 G4int sync=(G4int)LEN->size(); 202 G4int sync=(G4int)LEN->size();
200 if(sync<=I) G4cerr<<"*!*G4ChipsPiMinusNu 203 if(sync<=I) G4cerr<<"*!*G4ChipsPiMinusNuclCS::CalcCrosSect:Sync="<<sync<<"<="<<I<<G4endl;
201 lastLEN=(*LEN)[I]; // Poin 204 lastLEN=(*LEN)[I]; // Pointer to prepared LowEnergy cross sections
202 lastHEN=(*HEN)[I]; // Poin 205 lastHEN=(*HEN)[I]; // Pointer to prepared High Energy cross sections
203 } 206 }
204 else // This 207 else // This isotope wasn't calculated before => CREATE
205 { 208 {
206 lastLEN = new G4double[nL]; // Allo 209 lastLEN = new G4double[nL]; // Allocate memory for the new LEN cross sections
207 lastHEN = new G4double[nH]; // Allo 210 lastHEN = new G4double[nH]; // Allocate memory for the new HEN cross sections
208 // --- Instead of making a separate func 211 // --- Instead of making a separate function ---
209 G4double P=THmiG; // Tabl 212 G4double P=THmiG; // Table threshold in GeV/c
210 for(G4int k=0; k<nL; k++) 213 for(G4int k=0; k<nL; k++)
211 { 214 {
212 lastLEN[k] = CrossSectionLin(targZ, ta 215 lastLEN[k] = CrossSectionLin(targZ, targN, P);
213 P+=dPG; 216 P+=dPG;
214 } 217 }
215 G4double lP=milPG; 218 G4double lP=milPG;
216 for(G4int n=0; n<nH; n++) 219 for(G4int n=0; n<nH; n++)
217 { 220 {
218 lastHEN[n] = CrossSectionLog(targZ, ta 221 lastHEN[n] = CrossSectionLog(targZ, targN, lP);
219 lP+=dlP; 222 lP+=dlP;
220 } 223 }
221 // --- End of possible separate function 224 // --- End of possible separate function
222 // *** The synchronization check *** 225 // *** The synchronization check ***
223 G4int sync=(G4int)LEN->size(); 226 G4int sync=(G4int)LEN->size();
224 if(sync!=I) 227 if(sync!=I)
225 { 228 {
226 G4cerr<<"***G4ChipsPiMinusNuclCS::Calc 229 G4cerr<<"***G4ChipsPiMinusNuclCS::CalcCrossSect: Sinc="<<sync<<"#"<<I<<", Z=" <<targZ
227 <<", N="<<targN<<", F="<<F<<G4en 230 <<", N="<<targN<<", F="<<F<<G4endl;
228 //G4Exception("G4PiMinusNuclearCS::Cal 231 //G4Exception("G4PiMinusNuclearCS::CalculateCS:","39",FatalException,"DBoverflow");
229 } 232 }
230 LEN->push_back(lastLEN); // reme 233 LEN->push_back(lastLEN); // remember the Low Energy Table
231 HEN->push_back(lastHEN); // reme 234 HEN->push_back(lastHEN); // remember the High Energy Table
232 } // End of creation of the new set of par 235 } // End of creation of the new set of parameters
233 } // End of parameters udate 236 } // End of parameters udate
234 // =---------------------= NOW the Magic For 237 // =---------------------= NOW the Magic Formula =---------------------------=
235 G4double sigma; <<
236 if (Momentum<lastTH) return 0.; // It m 238 if (Momentum<lastTH) return 0.; // It must be already checked in the interface class
237 else if (Momentum<Pmin) // High 239 else if (Momentum<Pmin) // High Energy region
238 { 240 {
239 sigma=EquLinearFit(Momentum,nL,THmin,dP,la 241 sigma=EquLinearFit(Momentum,nL,THmin,dP,lastLEN);
240 } 242 }
241 else if (Momentum<Pmax) // High 243 else if (Momentum<Pmax) // High Energy region
242 { 244 {
243 G4double lP=G4Log(Momentum); 245 G4double lP=G4Log(Momentum);
244 sigma=EquLinearFit(lP,nH,milP,dlP,lastHEN) 246 sigma=EquLinearFit(lP,nH,milP,dlP,lastHEN);
245 } 247 }
246 else // UHE 248 else // UHE region (calculation, not frequent)
247 { 249 {
248 G4double P=0.001*Momentum; // Appr 250 G4double P=0.001*Momentum; // Approximation formula is for P in GeV/c
249 sigma=CrossSectionFormula(targZ, targN, P, 251 sigma=CrossSectionFormula(targZ, targN, P, G4Log(P));
250 } 252 }
251 if(sigma<0.) return 0.; 253 if(sigma<0.) return 0.;
252 return sigma; 254 return sigma;
253 } 255 }
254 256
255 // Calculation formula for piMinus-nuclear ine 257 // Calculation formula for piMinus-nuclear inelastic cross-section (mb) (P in GeV/c)
256 G4double G4ChipsPionMinusInelasticXS::CrossSec 258 G4double G4ChipsPionMinusInelasticXS::CrossSectionLin(G4int tZ, G4int tN, G4double P)
257 { 259 {
258 G4double lP=G4Log(P); 260 G4double lP=G4Log(P);
259 return CrossSectionFormula(tZ, tN, P, lP); 261 return CrossSectionFormula(tZ, tN, P, lP);
260 } 262 }
261 263
262 // Calculation formula for piMinus-nuclear ine 264 // Calculation formula for piMinus-nuclear inelastic cross-section (mb) log(P in GeV/c)
263 G4double G4ChipsPionMinusInelasticXS::CrossSec 265 G4double G4ChipsPionMinusInelasticXS::CrossSectionLog(G4int tZ, G4int tN, G4double lP)
264 { 266 {
265 G4double P=G4Exp(lP); 267 G4double P=G4Exp(lP);
266 return CrossSectionFormula(tZ, tN, P, lP); 268 return CrossSectionFormula(tZ, tN, P, lP);
267 } 269 }
268 // Calculation formula for piMinus-nuclear ine 270 // Calculation formula for piMinus-nuclear inelastic cross-section (mb) log(P in GeV/c)
269 G4double G4ChipsPionMinusInelasticXS::CrossSec 271 G4double G4ChipsPionMinusInelasticXS::CrossSectionFormula(G4int tZ, G4int tN,
270 272 G4double P, G4double lP)
271 { 273 {
272 G4double sigma=0.; 274 G4double sigma=0.;
273 if(tZ==1 && !tN) // P 275 if(tZ==1 && !tN) // PiMin-Proton interaction from G4QuasiElRatios
274 { 276 {
275 G4double lr=lP+1.27; // 277 G4double lr=lP+1.27; // From G4QuasiFreeRatios.cc Uzhi
276 G4double LE=1.53/(lr*lr+.0676); // 278 G4double LE=1.53/(lr*lr+.0676); // From G4QuasiFreeRatios.cc Uzhi
277 G4double ld=lP-3.5; 279 G4double ld=lP-3.5;
278 G4double ld2=ld*ld; 280 G4double ld2=ld*ld;
279 G4double p2=P*P; 281 G4double p2=P*P;
280 G4double p4=p2*p2; 282 G4double p4=p2*p2;
281 G4double sp=std::sqrt(P); 283 G4double sp=std::sqrt(P);
282 G4double lm=lP+.36; 284 G4double lm=lP+.36;
283 G4double md=lm*lm+.04; 285 G4double md=lm*lm+.04;
284 G4double lh=lP-.017; 286 G4double lh=lP-.017;
285 G4double hd=lh*lh+.0025; 287 G4double hd=lh*lh+.0025;
286 G4double El=(.0557*ld2+2.4+7./sp)/(1.+.7/p 288 G4double El=(.0557*ld2+2.4+7./sp)/(1.+.7/p4);
287 G4double To=(.3*ld2+22.3+12./sp)/(1.+.4/p4 289 G4double To=(.3*ld2+22.3+12./sp)/(1.+.4/p4);
288 sigma=(To-El)+.4/md+.01/hd; 290 sigma=(To-El)+.4/md+.01/hd;
289 sigma+=LE*2; // 291 sigma+=LE*2; // Uzhi
290 } 292 }
291 else if(tZ==1 && tN==1) // 293 else if(tZ==1 && tN==1) // pimp_tot
292 { 294 {
293 G4double p2=P*P; 295 G4double p2=P*P;
294 G4double d=lP-2.7; 296 G4double d=lP-2.7;
295 G4double f=lP+1.25; 297 G4double f=lP+1.25;
296 G4double gg=lP-.017; 298 G4double gg=lP-.017;
297 sigma=(.55*d*d+38.+23./std::sqrt(P))/(1.+. 299 sigma=(.55*d*d+38.+23./std::sqrt(P))/(1.+.3/p2/p2)+18./(f*f+.1089)+.02/(gg*gg+.0025);
298 } 300 }
299 else if(tZ<97 && tN<152) // G 301 else if(tZ<97 && tN<152) // General solution
300 { 302 {
301 G4double d=lP-4.2; 303 G4double d=lP-4.2;
302 G4double p2=P*P; 304 G4double p2=P*P;
303 G4double p4=p2*p2; 305 G4double p4=p2*p2;
304 G4double a=tN+tZ; // A 306 G4double a=tN+tZ; // A of the target
305 G4double al=G4Log(a); 307 G4double al=G4Log(a);
306 G4double sa=std::sqrt(a); 308 G4double sa=std::sqrt(a);
307 G4double ssa=std::sqrt(sa); 309 G4double ssa=std::sqrt(sa);
308 G4double a2=a*a; 310 G4double a2=a*a;
309 G4double c=41.*G4Exp(al*.68)*(1.+44./a2)/( 311 G4double c=41.*G4Exp(al*.68)*(1.+44./a2)/(1.+8./a)/(1.+200./a2/a2);
310 G4double f=120*sa/(1.+24./a/ssa); 312 G4double f=120*sa/(1.+24./a/ssa);
311 G4double gg=-1.32-al*.043; 313 G4double gg=-1.32-al*.043;
312 G4double u=lP-gg; 314 G4double u=lP-gg;
313 G4double h=al*(.388-.046*al); 315 G4double h=al*(.388-.046*al);
314 sigma=(c+d*d)/(1.+.17/p4)+f/(u*u+h*h); 316 sigma=(c+d*d)/(1.+.17/p4)+f/(u*u+h*h);
315 } 317 }
316 else 318 else
317 { 319 {
318 G4cerr<<"-Warning-G4ChipsPiMinusNuclearCro 320 G4cerr<<"-Warning-G4ChipsPiMinusNuclearCroSect::CSForm:*Bad A* Z="<<tZ<<", N="<<tN<<G4endl;
319 sigma=0.; 321 sigma=0.;
320 } 322 }
321 if(sigma<0.) return 0.; 323 if(sigma<0.) return 0.;
322 return sigma; 324 return sigma;
323 } 325 }
324 326
325 G4double G4ChipsPionMinusInelasticXS::EquLinea 327 G4double G4ChipsPionMinusInelasticXS::EquLinearFit(G4double X, G4int N, G4double X0, G4double DX, G4double* Y)
326 { 328 {
327 if(DX<=0. || N<2) 329 if(DX<=0. || N<2)
328 { 330 {
329 G4cerr<<"***G4ChipsPionMinusInelasticXS: 331 G4cerr<<"***G4ChipsPionMinusInelasticXS::EquLinearFit: DX="<<DX<<", N="<<N<<G4endl;
330 return Y[0]; 332 return Y[0];
331 } 333 }
332 334
333 G4int N2=N-2; 335 G4int N2=N-2;
334 G4double d=(X-X0)/DX; 336 G4double d=(X-X0)/DX;
335 G4int jj=static_cast<int>(d); 337 G4int jj=static_cast<int>(d);
336 if (jj<0) jj=0; 338 if (jj<0) jj=0;
337 else if(jj>N2) jj=N2; 339 else if(jj>N2) jj=N2;
338 d-=jj; // excess 340 d-=jj; // excess
339 G4double yi=Y[jj]; 341 G4double yi=Y[jj];
340 G4double sigma=yi+(Y[jj+1]-yi)*d; 342 G4double sigma=yi+(Y[jj+1]-yi)*d;
341 343
342 return sigma; 344 return sigma;
343 } 345 }
344 346