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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 // GEANT4 tag $Name: not supported by cvs2svn $
28 // 29 //
29 // 30 //
30 // G4 Physics class: G4ChipsPionMinusInelastic 31 // G4 Physics class: G4ChipsPionMinusInelasticXS for gamma+A cross sections
31 // Created: M.V. Kossov, CERN/ITEP(Moscow), 20 32 // Created: M.V. Kossov, CERN/ITEP(Moscow), 20-Dec-03
32 // The last update: M.V. Kossov, CERN/ITEP (Mo 33 // The last update: M.V. Kossov, CERN/ITEP (Moscow) 15-Feb-04
33 // 34 //
34 // ------------------------------------------- 35 // -------------------------------------------------------------------------------------
35 // Short description: Cross-sections extracted 36 // Short description: Cross-sections extracted (by W.Pokorski) from the CHIPS package for
36 // pion interactions. Original author: M. Koss 37 // pion interactions. Original author: M. Kossov
37 // ------------------------------------------- 38 // -------------------------------------------------------------------------------------
38 // 39 //
39 40
40 #include "G4ChipsPionMinusInelasticXS.hh" 41 #include "G4ChipsPionMinusInelasticXS.hh"
41 #include "G4ChipsPionPlusInelasticXS.hh" 42 #include "G4ChipsPionPlusInelasticXS.hh"
42 #include "G4SystemOfUnits.hh" 43 #include "G4SystemOfUnits.hh"
43 #include "G4DynamicParticle.hh" 44 #include "G4DynamicParticle.hh"
44 #include "G4ParticleDefinition.hh" 45 #include "G4ParticleDefinition.hh"
45 #include "G4PionMinus.hh" 46 #include "G4PionMinus.hh"
46 47
47 #include "G4Log.hh" <<
48 #include "G4Exp.hh" <<
49 <<
50 // factory 48 // factory
51 #include "G4CrossSectionFactory.hh" 49 #include "G4CrossSectionFactory.hh"
52 // 50 //
53 G4_DECLARE_XS_FACTORY(G4ChipsPionMinusInelasti 51 G4_DECLARE_XS_FACTORY(G4ChipsPionMinusInelasticXS);
54 52
55 G4ChipsPionMinusInelasticXS::G4ChipsPionMinusI 53 G4ChipsPionMinusInelasticXS::G4ChipsPionMinusInelasticXS():G4VCrossSectionDataSet("ChipsPionMinusInelasticXS")
56 { 54 {
57 // Initialization of the 55 // Initialization of the
58 lastLEN=0; // Pointer to lastArray of LowEn 56 lastLEN=0; // Pointer to lastArray of LowEn CS
59 lastHEN=0; // Pointer to lastArray of HighEn 57 lastHEN=0; // Pointer to lastArray of HighEn CS
60 lastN=0; // The last N of calculated nucle 58 lastN=0; // The last N of calculated nucleus
61 lastZ=0; // The last Z of calculated nucle 59 lastZ=0; // The last Z of calculated nucleus
62 lastP=0.; // Last used cross section Moment 60 lastP=0.; // Last used cross section Momentum
63 lastTH=0.; // Last threshold momentum 61 lastTH=0.; // Last threshold momentum
64 lastCS=0.; // Last value of the Cross Sectio 62 lastCS=0.; // Last value of the Cross Section
65 lastI=0; // The last position in the DAMDB 63 lastI=0; // The last position in the DAMDB
66 LEN = new std::vector<G4double*>; 64 LEN = new std::vector<G4double*>;
67 HEN = new std::vector<G4double*>; 65 HEN = new std::vector<G4double*>;
68 } 66 }
69 67
70 G4ChipsPionMinusInelasticXS::~G4ChipsPionMinus 68 G4ChipsPionMinusInelasticXS::~G4ChipsPionMinusInelasticXS()
71 { 69 {
72 std::size_t lens=LEN->size(); << 70 G4int lens=LEN->size();
73 for(std::size_t i=0; i<lens; ++i) delete[] ( << 71 for(G4int i=0; i<lens; ++i) delete[] (*LEN)[i];
74 delete LEN; 72 delete LEN;
75 std::size_t hens=HEN->size(); << 73 G4int hens=HEN->size();
76 for(std::size_t i=0; i<hens; ++i) delete[] ( << 74 for(G4int i=0; i<hens; ++i) delete[] (*HEN)[i];
77 delete HEN; 75 delete HEN;
78 } 76 }
79 77
80 void <<
81 G4ChipsPionMinusInelasticXS::CrossSectionDescr <<
82 { <<
83 outFile << "G4ChipsPionMinusInelasticXS pr <<
84 << "section for pion- nucleus scat <<
85 << "momentum. The cross section is <<
86 << "CHIPS parameterization of cros <<
87 } <<
88 78
89 G4bool G4ChipsPionMinusInelasticXS::IsIsoAppli << 79 G4bool G4ChipsPionMinusInelasticXS::IsIsoApplicable(const G4DynamicParticle* Pt, G4int, G4int,
90 const G4Element*, 80 const G4Element*,
91 const G4Material*) 81 const G4Material*)
92 { 82 {
93 return true; << 83 G4ParticleDefinition* particle = Pt->GetDefinition();
>> 84 if (particle == G4PionMinus::PionMinus() ) return true;
>> 85 return false;
94 } 86 }
95 87
96 // The main member function giving the collisi 88 // 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 89 // Make pMom in independent units ! (Now it is MeV)
98 G4double G4ChipsPionMinusInelasticXS::GetIsoCr 90 G4double G4ChipsPionMinusInelasticXS::GetIsoCrossSection(const G4DynamicParticle* Pt, G4int tgZ, G4int A,
99 const G4Isotope*, 91 const G4Isotope*,
100 const G4Element*, 92 const G4Element*,
101 const G4Material*) 93 const G4Material*)
102 { 94 {
103 G4double pMom=Pt->GetTotalMomentum(); 95 G4double pMom=Pt->GetTotalMomentum();
104 G4int tgN = A - tgZ; 96 G4int tgN = A - tgZ;
105 97
106 return GetChipsCrossSection(pMom, tgZ, tgN, 98 return GetChipsCrossSection(pMom, tgZ, tgN, -211);
107 } 99 }
108 100
109 G4double G4ChipsPionMinusInelasticXS::GetChips 101 G4double G4ChipsPionMinusInelasticXS::GetChipsCrossSection(G4double pMom, G4int tgZ, G4int tgN, G4int)
110 { 102 {
>> 103 static G4int j; // A#0f Z/N-records already tested in AMDB
>> 104 static std::vector <G4int> colN; // Vector of N for calculated nuclei (isotops)
>> 105 static std::vector <G4int> colZ; // Vector of Z for calculated nuclei (isotops)
>> 106 static std::vector <G4double> colP; // Vector of last momenta for the reaction
>> 107 static std::vector <G4double> colTH; // Vector of energy thresholds for the reaction
>> 108 static std::vector <G4double> colCS; // Vector of last cross sections for the reaction
>> 109 // ***---*** End of the mandatory Static Definitions of the Associative Memory ***---***
111 110
112 G4bool in=false; // By d 111 G4bool in=false; // By default the isotope must be found in the AMDB
113 if(tgN!=lastN || tgZ!=lastZ) // The 112 if(tgN!=lastN || tgZ!=lastZ) // The nucleus was not the last used isotope
114 { 113 {
115 in = false; // By d 114 in = false; // By default the isotope haven't be found in AMDB
116 lastP = 0.; // New 115 lastP = 0.; // New momentum history (nothing to compare with)
117 lastN = tgN; // The 116 lastN = tgN; // The last N of the calculated nucleus
118 lastZ = tgZ; // The 117 lastZ = tgZ; // The last Z of the calculated nucleus
119 lastI = (G4int)colN.size(); // Size << 118 lastI = colN.size(); // Size of the Associative Memory DB in the heap
120 j = 0; // A#0f 119 j = 0; // A#0f records found in DB for this projectile
121 if(lastI) for(G4int i=0; i<lastI; ++i) // << 120 if(lastI) for(G4int i=0; i<lastI; i++) // AMDB exists, try to find the (Z,N) isotope
122 { 121 {
123 if(colN[i]==tgN && colZ[i]==tgZ) // Try 122 if(colN[i]==tgN && colZ[i]==tgZ) // Try the record "i" in the AMDB
124 { 123 {
125 lastI=i; // Reme 124 lastI=i; // Remember the index for future fast/last use
126 lastTH =colTH[i]; // The 125 lastTH =colTH[i]; // The last THreshold (A-dependent)
127 if(pMom<=lastTH) 126 if(pMom<=lastTH)
128 { 127 {
129 return 0.; // Ener 128 return 0.; // Energy is below the Threshold value
130 } 129 }
131 lastP =colP [i]; // Last 130 lastP =colP [i]; // Last Momentum (A-dependent)
132 lastCS =colCS[i]; // Last 131 lastCS =colCS[i]; // Last CrossSect (A-dependent)
133 in = true; // This 132 in = true; // This is the case when the isotop is found in DB
134 // Momentum pMom is in IU ! @@ Units 133 // Momentum pMom is in IU ! @@ Units
135 lastCS=CalculateCrossSection(-1,j,-211 134 lastCS=CalculateCrossSection(-1,j,-211,lastZ,lastN,pMom); // read & update
136 if(lastCS<=0. && pMom>lastTH) // Corr 135 if(lastCS<=0. && pMom>lastTH) // Correct the threshold (@@ No intermediate Zeros)
137 { 136 {
138 lastCS=0.; 137 lastCS=0.;
139 lastTH=pMom; 138 lastTH=pMom;
140 } 139 }
141 break; // Go o 140 break; // Go out of the LOOP
142 } 141 }
143 j++; // Incr 142 j++; // Increment a#0f records found in DB
144 } 143 }
145 if(!in) // This 144 if(!in) // This isotope has not been calculated previously
146 { 145 {
147 //!!The slave functions must provide cro 146 //!!The slave functions must provide cross-sections in millibarns (mb) !! (not in IU)
148 lastCS=CalculateCrossSection(0,j,-211,la 147 lastCS=CalculateCrossSection(0,j,-211,lastZ,lastN,pMom); //calculate & create
149 //if(lastCS>0.) // It 148 //if(lastCS>0.) // It means that the AMBD was initialized
150 //{ 149 //{
151 150
152 lastTH = 0; //ThresholdEnergy(tgZ, tgN); 151 lastTH = 0; //ThresholdEnergy(tgZ, tgN); // The Threshold Energy which is now the last
153 colN.push_back(tgN); 152 colN.push_back(tgN);
154 colZ.push_back(tgZ); 153 colZ.push_back(tgZ);
155 colP.push_back(pMom); 154 colP.push_back(pMom);
156 colTH.push_back(lastTH); 155 colTH.push_back(lastTH);
157 colCS.push_back(lastCS); 156 colCS.push_back(lastCS);
158 //} // M.K. Presence of H1 with high thr 157 //} // M.K. Presence of H1 with high threshold breaks the syncronization
159 return lastCS*millibarn; 158 return lastCS*millibarn;
160 } // End of creation of the new set of par 159 } // End of creation of the new set of parameters
161 else 160 else
162 { 161 {
163 colP[lastI]=pMom; 162 colP[lastI]=pMom;
164 colCS[lastI]=lastCS; 163 colCS[lastI]=lastCS;
165 } 164 }
166 } // End of parameters udate 165 } // End of parameters udate
167 else if(pMom<=lastTH) 166 else if(pMom<=lastTH)
168 { 167 {
169 return 0.; // Mome 168 return 0.; // Momentum is below the Threshold Value -> CS=0
170 } 169 }
171 else // It i 170 else // It is the last used -> use the current tables
172 { 171 {
173 lastCS=CalculateCrossSection(1,j,-211,last 172 lastCS=CalculateCrossSection(1,j,-211,lastZ,lastN,pMom); // Only read and UpdateDB
174 lastP=pMom; 173 lastP=pMom;
175 } 174 }
176 return lastCS*millibarn; 175 return lastCS*millibarn;
177 } 176 }
178 177
179 // The main member function giving the gamma-A 178 // The main member function giving the gamma-A cross section (E in GeV, CS in mb)
180 G4double G4ChipsPionMinusInelasticXS::Calculat 179 G4double G4ChipsPionMinusInelasticXS::CalculateCrossSection(G4int F, G4int I,
181 G4int, 180 G4int, G4int targZ, G4int targN, G4double Momentum)
182 { 181 {
183 static const G4double THmin=27.; // defa 182 static const G4double THmin=27.; // default minimum Momentum (MeV/c) Threshold
184 static const G4double THmiG=THmin*.001; // m 183 static const G4double THmiG=THmin*.001; // minimum Momentum (GeV/c) Threshold
185 static const G4double dP=10.; // step 184 static const G4double dP=10.; // step for the LEN (Low ENergy) table MeV/c
186 static const G4double dPG=dP*.001; // step 185 static const G4double dPG=dP*.001; // step for the LEN (Low ENergy) table GeV/c
187 static const G4int nL=105; // A#of 186 static const G4int nL=105; // A#of LEN points in E (step 10 MeV/c)
188 static const G4double Pmin=THmin+(nL-1)*dP; 187 static const G4double Pmin=THmin+(nL-1)*dP; // minP for the HighE part with safety
189 static const G4double Pmax=227000.; // maxP 188 static const G4double Pmax=227000.; // maxP for the HEN (High ENergy) part 227 GeV
190 static const G4int nH=224; // A#of 189 static const G4int nH=224; // A#of HEN points in lnE
191 static const G4double milP=G4Log(Pmin);// Lo << 190 static const G4double milP=std::log(Pmin);// Low logarithm energy for the HEN part
192 static const G4double malP=G4Log(Pmax);// Hi << 191 static const G4double malP=std::log(Pmax);// High logarithm energy (each 2.75 percent)
193 static const G4double dlP=(malP-milP)/(nH-1) 192 static const G4double dlP=(malP-milP)/(nH-1); // Step in log energy in the HEN part
194 static const G4double milPG=G4Log(.001*Pmin) << 193 static const G4double milPG=std::log(.001*Pmin);// Low logarithmEnergy for HEN part GeV/c
>> 194 G4double sigma=0.;
>> 195 if(F&&I) sigma=0.; // @@ *!* Fake line *!* to use F & I !!!Temporary!!!
>> 196 //G4double A=targN+targZ; // A of the target
195 if(F<=0) // This 197 if(F<=0) // This isotope was not the last used isotop
196 { 198 {
197 if(F<0) // This 199 if(F<0) // This isotope was found in DAMDB =-----=> RETRIEVE
198 { 200 {
199 G4int sync=(G4int)LEN->size(); << 201 G4int sync=LEN->size();
200 if(sync<=I) G4cerr<<"*!*G4ChipsPiMinusNu 202 if(sync<=I) G4cerr<<"*!*G4ChipsPiMinusNuclCS::CalcCrosSect:Sync="<<sync<<"<="<<I<<G4endl;
201 lastLEN=(*LEN)[I]; // Poin 203 lastLEN=(*LEN)[I]; // Pointer to prepared LowEnergy cross sections
202 lastHEN=(*HEN)[I]; // Poin 204 lastHEN=(*HEN)[I]; // Pointer to prepared High Energy cross sections
203 } 205 }
204 else // This 206 else // This isotope wasn't calculated before => CREATE
205 { 207 {
206 lastLEN = new G4double[nL]; // Allo 208 lastLEN = new G4double[nL]; // Allocate memory for the new LEN cross sections
207 lastHEN = new G4double[nH]; // Allo 209 lastHEN = new G4double[nH]; // Allocate memory for the new HEN cross sections
208 // --- Instead of making a separate func 210 // --- Instead of making a separate function ---
209 G4double P=THmiG; // Tabl 211 G4double P=THmiG; // Table threshold in GeV/c
210 for(G4int k=0; k<nL; k++) 212 for(G4int k=0; k<nL; k++)
211 { 213 {
212 lastLEN[k] = CrossSectionLin(targZ, ta 214 lastLEN[k] = CrossSectionLin(targZ, targN, P);
213 P+=dPG; 215 P+=dPG;
214 } 216 }
215 G4double lP=milPG; 217 G4double lP=milPG;
216 for(G4int n=0; n<nH; n++) 218 for(G4int n=0; n<nH; n++)
217 { 219 {
218 lastHEN[n] = CrossSectionLog(targZ, ta 220 lastHEN[n] = CrossSectionLog(targZ, targN, lP);
219 lP+=dlP; 221 lP+=dlP;
220 } 222 }
221 // --- End of possible separate function 223 // --- End of possible separate function
222 // *** The synchronization check *** 224 // *** The synchronization check ***
223 G4int sync=(G4int)LEN->size(); << 225 G4int sync=LEN->size();
224 if(sync!=I) 226 if(sync!=I)
225 { 227 {
226 G4cerr<<"***G4ChipsPiMinusNuclCS::Calc 228 G4cerr<<"***G4ChipsPiMinusNuclCS::CalcCrossSect: Sinc="<<sync<<"#"<<I<<", Z=" <<targZ
227 <<", N="<<targN<<", F="<<F<<G4en 229 <<", N="<<targN<<", F="<<F<<G4endl;
228 //G4Exception("G4PiMinusNuclearCS::Cal 230 //G4Exception("G4PiMinusNuclearCS::CalculateCS:","39",FatalException,"DBoverflow");
229 } 231 }
230 LEN->push_back(lastLEN); // reme 232 LEN->push_back(lastLEN); // remember the Low Energy Table
231 HEN->push_back(lastHEN); // reme 233 HEN->push_back(lastHEN); // remember the High Energy Table
232 } // End of creation of the new set of par 234 } // End of creation of the new set of parameters
233 } // End of parameters udate 235 } // End of parameters udate
234 // =---------------------= NOW the Magic For 236 // =---------------------= NOW the Magic Formula =---------------------------=
235 G4double sigma; <<
236 if (Momentum<lastTH) return 0.; // It m 237 if (Momentum<lastTH) return 0.; // It must be already checked in the interface class
237 else if (Momentum<Pmin) // High 238 else if (Momentum<Pmin) // High Energy region
238 { 239 {
239 sigma=EquLinearFit(Momentum,nL,THmin,dP,la 240 sigma=EquLinearFit(Momentum,nL,THmin,dP,lastLEN);
240 } 241 }
241 else if (Momentum<Pmax) // High 242 else if (Momentum<Pmax) // High Energy region
242 { 243 {
243 G4double lP=G4Log(Momentum); << 244 G4double lP=std::log(Momentum);
244 sigma=EquLinearFit(lP,nH,milP,dlP,lastHEN) 245 sigma=EquLinearFit(lP,nH,milP,dlP,lastHEN);
245 } 246 }
246 else // UHE 247 else // UHE region (calculation, not frequent)
247 { 248 {
248 G4double P=0.001*Momentum; // Appr 249 G4double P=0.001*Momentum; // Approximation formula is for P in GeV/c
249 sigma=CrossSectionFormula(targZ, targN, P, << 250 sigma=CrossSectionFormula(targZ, targN, P, std::log(P));
250 } 251 }
251 if(sigma<0.) return 0.; 252 if(sigma<0.) return 0.;
252 return sigma; 253 return sigma;
253 } 254 }
254 255
255 // Calculation formula for piMinus-nuclear ine 256 // Calculation formula for piMinus-nuclear inelastic cross-section (mb) (P in GeV/c)
256 G4double G4ChipsPionMinusInelasticXS::CrossSec 257 G4double G4ChipsPionMinusInelasticXS::CrossSectionLin(G4int tZ, G4int tN, G4double P)
257 { 258 {
258 G4double lP=G4Log(P); << 259 G4double lP=std::log(P);
259 return CrossSectionFormula(tZ, tN, P, lP); 260 return CrossSectionFormula(tZ, tN, P, lP);
260 } 261 }
261 262
262 // Calculation formula for piMinus-nuclear ine 263 // Calculation formula for piMinus-nuclear inelastic cross-section (mb) log(P in GeV/c)
263 G4double G4ChipsPionMinusInelasticXS::CrossSec 264 G4double G4ChipsPionMinusInelasticXS::CrossSectionLog(G4int tZ, G4int tN, G4double lP)
264 { 265 {
265 G4double P=G4Exp(lP); << 266 G4double P=std::exp(lP);
266 return CrossSectionFormula(tZ, tN, P, lP); 267 return CrossSectionFormula(tZ, tN, P, lP);
267 } 268 }
268 // Calculation formula for piMinus-nuclear ine 269 // Calculation formula for piMinus-nuclear inelastic cross-section (mb) log(P in GeV/c)
269 G4double G4ChipsPionMinusInelasticXS::CrossSec 270 G4double G4ChipsPionMinusInelasticXS::CrossSectionFormula(G4int tZ, G4int tN,
270 271 G4double P, G4double lP)
271 { 272 {
272 G4double sigma=0.; 273 G4double sigma=0.;
273 if(tZ==1 && !tN) // P 274 if(tZ==1 && !tN) // PiMin-Proton interaction from G4QuasiElRatios
274 { 275 {
275 G4double lr=lP+1.27; // 276 G4double lr=lP+1.27; // From G4QuasiFreeRatios.cc Uzhi
276 G4double LE=1.53/(lr*lr+.0676); // 277 G4double LE=1.53/(lr*lr+.0676); // From G4QuasiFreeRatios.cc Uzhi
277 G4double ld=lP-3.5; 278 G4double ld=lP-3.5;
278 G4double ld2=ld*ld; 279 G4double ld2=ld*ld;
279 G4double p2=P*P; 280 G4double p2=P*P;
280 G4double p4=p2*p2; 281 G4double p4=p2*p2;
281 G4double sp=std::sqrt(P); 282 G4double sp=std::sqrt(P);
282 G4double lm=lP+.36; 283 G4double lm=lP+.36;
283 G4double md=lm*lm+.04; 284 G4double md=lm*lm+.04;
284 G4double lh=lP-.017; 285 G4double lh=lP-.017;
285 G4double hd=lh*lh+.0025; 286 G4double hd=lh*lh+.0025;
286 G4double El=(.0557*ld2+2.4+7./sp)/(1.+.7/p 287 G4double El=(.0557*ld2+2.4+7./sp)/(1.+.7/p4);
287 G4double To=(.3*ld2+22.3+12./sp)/(1.+.4/p4 288 G4double To=(.3*ld2+22.3+12./sp)/(1.+.4/p4);
288 sigma=(To-El)+.4/md+.01/hd; 289 sigma=(To-El)+.4/md+.01/hd;
289 sigma+=LE*2; // 290 sigma+=LE*2; // Uzhi
290 } 291 }
291 else if(tZ==1 && tN==1) // 292 else if(tZ==1 && tN==1) // pimp_tot
292 { 293 {
293 G4double p2=P*P; 294 G4double p2=P*P;
294 G4double d=lP-2.7; 295 G4double d=lP-2.7;
295 G4double f=lP+1.25; 296 G4double f=lP+1.25;
296 G4double gg=lP-.017; 297 G4double gg=lP-.017;
297 sigma=(.55*d*d+38.+23./std::sqrt(P))/(1.+. 298 sigma=(.55*d*d+38.+23./std::sqrt(P))/(1.+.3/p2/p2)+18./(f*f+.1089)+.02/(gg*gg+.0025);
298 } 299 }
299 else if(tZ<97 && tN<152) // G 300 else if(tZ<97 && tN<152) // General solution
300 { 301 {
301 G4double d=lP-4.2; 302 G4double d=lP-4.2;
302 G4double p2=P*P; 303 G4double p2=P*P;
303 G4double p4=p2*p2; 304 G4double p4=p2*p2;
304 G4double a=tN+tZ; // A 305 G4double a=tN+tZ; // A of the target
305 G4double al=G4Log(a); << 306 G4double al=std::log(a);
306 G4double sa=std::sqrt(a); 307 G4double sa=std::sqrt(a);
307 G4double ssa=std::sqrt(sa); 308 G4double ssa=std::sqrt(sa);
308 G4double a2=a*a; 309 G4double a2=a*a;
309 G4double c=41.*G4Exp(al*.68)*(1.+44./a2)/( << 310 G4double c=41.*std::exp(al*.68)*(1.+44./a2)/(1.+8./a)/(1.+200./a2/a2);
310 G4double f=120*sa/(1.+24./a/ssa); 311 G4double f=120*sa/(1.+24./a/ssa);
311 G4double gg=-1.32-al*.043; 312 G4double gg=-1.32-al*.043;
312 G4double u=lP-gg; 313 G4double u=lP-gg;
313 G4double h=al*(.388-.046*al); 314 G4double h=al*(.388-.046*al);
314 sigma=(c+d*d)/(1.+.17/p4)+f/(u*u+h*h); 315 sigma=(c+d*d)/(1.+.17/p4)+f/(u*u+h*h);
315 } 316 }
316 else 317 else
317 { 318 {
318 G4cerr<<"-Warning-G4ChipsPiMinusNuclearCro 319 G4cerr<<"-Warning-G4ChipsPiMinusNuclearCroSect::CSForm:*Bad A* Z="<<tZ<<", N="<<tN<<G4endl;
319 sigma=0.; 320 sigma=0.;
320 } 321 }
321 if(sigma<0.) return 0.; 322 if(sigma<0.) return 0.;
322 return sigma; 323 return sigma;
323 } 324 }
324 325
325 G4double G4ChipsPionMinusInelasticXS::EquLinea 326 G4double G4ChipsPionMinusInelasticXS::EquLinearFit(G4double X, G4int N, G4double X0, G4double DX, G4double* Y)
326 { 327 {
327 if(DX<=0. || N<2) 328 if(DX<=0. || N<2)
328 { 329 {
329 G4cerr<<"***G4ChipsPionMinusInelasticXS: 330 G4cerr<<"***G4ChipsPionMinusInelasticXS::EquLinearFit: DX="<<DX<<", N="<<N<<G4endl;
330 return Y[0]; 331 return Y[0];
331 } 332 }
332 333
333 G4int N2=N-2; 334 G4int N2=N-2;
334 G4double d=(X-X0)/DX; 335 G4double d=(X-X0)/DX;
335 G4int jj=static_cast<int>(d); << 336 G4int j=static_cast<int>(d);
336 if (jj<0) jj=0; << 337 if (j<0) j=0;
337 else if(jj>N2) jj=N2; << 338 else if(j>N2) j=N2;
338 d-=jj; // excess << 339 d-=j; // excess
339 G4double yi=Y[jj]; << 340 G4double yi=Y[j];
340 G4double sigma=yi+(Y[jj+1]-yi)*d; << 341 G4double sigma=yi+(Y[j+1]-yi)*d;
341 342
342 return sigma; 343 return sigma;
343 } 344 }
344 345