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26 //
27 // The lust update: M.V. Kossov, CERN/ITEP(Mos
28 //
29 //
30 // G4 Physics class: G4ChipsPionMinusInelastic
31 // Created: M.V. Kossov, CERN/ITEP(Moscow), 20
32 // The last update: M.V. Kossov, CERN/ITEP (Mo
33 //
34 // -------------------------------------------
35 // Short description: Cross-sections extracted
36 // pion interactions. Original author: M. Koss
37 // -------------------------------------------
38 //
39
40 #include "G4ChipsPionMinusInelasticXS.hh"
41 #include "G4ChipsPionPlusInelasticXS.hh"
42 #include "G4SystemOfUnits.hh"
43 #include "G4DynamicParticle.hh"
44 #include "G4ParticleDefinition.hh"
45 #include "G4PionMinus.hh"
46
47 #include "G4Log.hh"
48 #include "G4Exp.hh"
49
50 // factory
51 #include "G4CrossSectionFactory.hh"
52 //
53 G4_DECLARE_XS_FACTORY(G4ChipsPionMinusInelasti
54
55 G4ChipsPionMinusInelasticXS::G4ChipsPionMinusI
56 {
57 // Initialization of the
58 lastLEN=0; // Pointer to lastArray of LowEn
59 lastHEN=0; // Pointer to lastArray of HighEn
60 lastN=0; // The last N of calculated nucle
61 lastZ=0; // The last Z of calculated nucle
62 lastP=0.; // Last used cross section Moment
63 lastTH=0.; // Last threshold momentum
64 lastCS=0.; // Last value of the Cross Sectio
65 lastI=0; // The last position in the DAMDB
66 LEN = new std::vector<G4double*>;
67 HEN = new std::vector<G4double*>;
68 }
69
70 G4ChipsPionMinusInelasticXS::~G4ChipsPionMinus
71 {
72 std::size_t lens=LEN->size();
73 for(std::size_t i=0; i<lens; ++i) delete[] (
74 delete LEN;
75 std::size_t hens=HEN->size();
76 for(std::size_t i=0; i<hens; ++i) delete[] (
77 delete HEN;
78 }
79
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
89 G4bool G4ChipsPionMinusInelasticXS::IsIsoAppli
90 const G4Element*,
91 const G4Material*)
92 {
93 return true;
94 }
95
96 // The main member function giving the collisi
97 // Make pMom in independent units ! (Now it is
98 G4double G4ChipsPionMinusInelasticXS::GetIsoCr
99 const G4Isotope*,
100 const G4Element*,
101 const G4Material*)
102 {
103 G4double pMom=Pt->GetTotalMomentum();
104 G4int tgN = A - tgZ;
105
106 return GetChipsCrossSection(pMom, tgZ, tgN,
107 }
108
109 G4double G4ChipsPionMinusInelasticXS::GetChips
110 {
111
112 G4bool in=false; // By d
113 if(tgN!=lastN || tgZ!=lastZ) // The
114 {
115 in = false; // By d
116 lastP = 0.; // New
117 lastN = tgN; // The
118 lastZ = tgZ; // The
119 lastI = (G4int)colN.size(); // Size
120 j = 0; // A#0f
121 if(lastI) for(G4int i=0; i<lastI; ++i) //
122 {
123 if(colN[i]==tgN && colZ[i]==tgZ) // Try
124 {
125 lastI=i; // Reme
126 lastTH =colTH[i]; // The
127 if(pMom<=lastTH)
128 {
129 return 0.; // Ener
130 }
131 lastP =colP [i]; // Last
132 lastCS =colCS[i]; // Last
133 in = true; // This
134 // Momentum pMom is in IU ! @@ Units
135 lastCS=CalculateCrossSection(-1,j,-211
136 if(lastCS<=0. && pMom>lastTH) // Corr
137 {
138 lastCS=0.;
139 lastTH=pMom;
140 }
141 break; // Go o
142 }
143 j++; // Incr
144 }
145 if(!in) // This
146 {
147 //!!The slave functions must provide cro
148 lastCS=CalculateCrossSection(0,j,-211,la
149 //if(lastCS>0.) // It
150 //{
151
152 lastTH = 0; //ThresholdEnergy(tgZ, tgN);
153 colN.push_back(tgN);
154 colZ.push_back(tgZ);
155 colP.push_back(pMom);
156 colTH.push_back(lastTH);
157 colCS.push_back(lastCS);
158 //} // M.K. Presence of H1 with high thr
159 return lastCS*millibarn;
160 } // End of creation of the new set of par
161 else
162 {
163 colP[lastI]=pMom;
164 colCS[lastI]=lastCS;
165 }
166 } // End of parameters udate
167 else if(pMom<=lastTH)
168 {
169 return 0.; // Mome
170 }
171 else // It i
172 {
173 lastCS=CalculateCrossSection(1,j,-211,last
174 lastP=pMom;
175 }
176 return lastCS*millibarn;
177 }
178
179 // The main member function giving the gamma-A
180 G4double G4ChipsPionMinusInelasticXS::Calculat
181 G4int,
182 {
183 static const G4double THmin=27.; // defa
184 static const G4double THmiG=THmin*.001; // m
185 static const G4double dP=10.; // step
186 static const G4double dPG=dP*.001; // step
187 static const G4int nL=105; // A#of
188 static const G4double Pmin=THmin+(nL-1)*dP;
189 static const G4double Pmax=227000.; // maxP
190 static const G4int nH=224; // A#of
191 static const G4double milP=G4Log(Pmin);// Lo
192 static const G4double malP=G4Log(Pmax);// Hi
193 static const G4double dlP=(malP-milP)/(nH-1)
194 static const G4double milPG=G4Log(.001*Pmin)
195 if(F<=0) // This
196 {
197 if(F<0) // This
198 {
199 G4int sync=(G4int)LEN->size();
200 if(sync<=I) G4cerr<<"*!*G4ChipsPiMinusNu
201 lastLEN=(*LEN)[I]; // Poin
202 lastHEN=(*HEN)[I]; // Poin
203 }
204 else // This
205 {
206 lastLEN = new G4double[nL]; // Allo
207 lastHEN = new G4double[nH]; // Allo
208 // --- Instead of making a separate func
209 G4double P=THmiG; // Tabl
210 for(G4int k=0; k<nL; k++)
211 {
212 lastLEN[k] = CrossSectionLin(targZ, ta
213 P+=dPG;
214 }
215 G4double lP=milPG;
216 for(G4int n=0; n<nH; n++)
217 {
218 lastHEN[n] = CrossSectionLog(targZ, ta
219 lP+=dlP;
220 }
221 // --- End of possible separate function
222 // *** The synchronization check ***
223 G4int sync=(G4int)LEN->size();
224 if(sync!=I)
225 {
226 G4cerr<<"***G4ChipsPiMinusNuclCS::Calc
227 <<", N="<<targN<<", F="<<F<<G4en
228 //G4Exception("G4PiMinusNuclearCS::Cal
229 }
230 LEN->push_back(lastLEN); // reme
231 HEN->push_back(lastHEN); // reme
232 } // End of creation of the new set of par
233 } // End of parameters udate
234 // =---------------------= NOW the Magic For
235 G4double sigma;
236 if (Momentum<lastTH) return 0.; // It m
237 else if (Momentum<Pmin) // High
238 {
239 sigma=EquLinearFit(Momentum,nL,THmin,dP,la
240 }
241 else if (Momentum<Pmax) // High
242 {
243 G4double lP=G4Log(Momentum);
244 sigma=EquLinearFit(lP,nH,milP,dlP,lastHEN)
245 }
246 else // UHE
247 {
248 G4double P=0.001*Momentum; // Appr
249 sigma=CrossSectionFormula(targZ, targN, P,
250 }
251 if(sigma<0.) return 0.;
252 return sigma;
253 }
254
255 // Calculation formula for piMinus-nuclear ine
256 G4double G4ChipsPionMinusInelasticXS::CrossSec
257 {
258 G4double lP=G4Log(P);
259 return CrossSectionFormula(tZ, tN, P, lP);
260 }
261
262 // Calculation formula for piMinus-nuclear ine
263 G4double G4ChipsPionMinusInelasticXS::CrossSec
264 {
265 G4double P=G4Exp(lP);
266 return CrossSectionFormula(tZ, tN, P, lP);
267 }
268 // Calculation formula for piMinus-nuclear ine
269 G4double G4ChipsPionMinusInelasticXS::CrossSec
270
271 {
272 G4double sigma=0.;
273 if(tZ==1 && !tN) // P
274 {
275 G4double lr=lP+1.27; //
276 G4double LE=1.53/(lr*lr+.0676); //
277 G4double ld=lP-3.5;
278 G4double ld2=ld*ld;
279 G4double p2=P*P;
280 G4double p4=p2*p2;
281 G4double sp=std::sqrt(P);
282 G4double lm=lP+.36;
283 G4double md=lm*lm+.04;
284 G4double lh=lP-.017;
285 G4double hd=lh*lh+.0025;
286 G4double El=(.0557*ld2+2.4+7./sp)/(1.+.7/p
287 G4double To=(.3*ld2+22.3+12./sp)/(1.+.4/p4
288 sigma=(To-El)+.4/md+.01/hd;
289 sigma+=LE*2; //
290 }
291 else if(tZ==1 && tN==1) //
292 {
293 G4double p2=P*P;
294 G4double d=lP-2.7;
295 G4double f=lP+1.25;
296 G4double gg=lP-.017;
297 sigma=(.55*d*d+38.+23./std::sqrt(P))/(1.+.
298 }
299 else if(tZ<97 && tN<152) // G
300 {
301 G4double d=lP-4.2;
302 G4double p2=P*P;
303 G4double p4=p2*p2;
304 G4double a=tN+tZ; // A
305 G4double al=G4Log(a);
306 G4double sa=std::sqrt(a);
307 G4double ssa=std::sqrt(sa);
308 G4double a2=a*a;
309 G4double c=41.*G4Exp(al*.68)*(1.+44./a2)/(
310 G4double f=120*sa/(1.+24./a/ssa);
311 G4double gg=-1.32-al*.043;
312 G4double u=lP-gg;
313 G4double h=al*(.388-.046*al);
314 sigma=(c+d*d)/(1.+.17/p4)+f/(u*u+h*h);
315 }
316 else
317 {
318 G4cerr<<"-Warning-G4ChipsPiMinusNuclearCro
319 sigma=0.;
320 }
321 if(sigma<0.) return 0.;
322 return sigma;
323 }
324
325 G4double G4ChipsPionMinusInelasticXS::EquLinea
326 {
327 if(DX<=0. || N<2)
328 {
329 G4cerr<<"***G4ChipsPionMinusInelasticXS:
330 return Y[0];
331 }
332
333 G4int N2=N-2;
334 G4double d=(X-X0)/DX;
335 G4int jj=static_cast<int>(d);
336 if (jj<0) jj=0;
337 else if(jj>N2) jj=N2;
338 d-=jj; // excess
339 G4double yi=Y[jj];
340 G4double sigma=yi+(Y[jj+1]-yi)*d;
341
342 return sigma;
343 }
344