G4ChipsPionPlusElasticXS Class Reference

#include <G4ChipsPionPlusElasticXS.hh>

Inheritance diagram for G4ChipsPionPlusElasticXS:

G4VCrossSectionDataSet

Public Member Functions

 G4ChipsPionPlusElasticXS ()
 ~G4ChipsPionPlusElasticXS ()
virtual G4bool IsIsoApplicable (const G4DynamicParticle *Pt, G4int Z, G4int A, const G4Element *elm, const G4Material *mat)
virtual G4double GetIsoCrossSection (const G4DynamicParticle *, G4int tgZ, G4int A, const G4Isotope *iso=0, const G4Element *elm=0, const G4Material *mat=0)
virtual G4double GetChipsCrossSection (G4double momentum, G4int Z, G4int N, G4int pdg)
G4double GetExchangeT (G4int tZ, G4int tN, G4int pPDG)

Static Public Member Functions

static const char * Default_Name ()

Detailed Description

Definition at line 47 of file G4ChipsPionPlusElasticXS.hh.


Constructor & Destructor Documentation

G4ChipsPionPlusElasticXS::G4ChipsPionPlusElasticXS (  ) 

Definition at line 54 of file G4ChipsPionPlusElasticXS.cc.

00054                                                   :G4VCrossSectionDataSet(Default_Name()), nPoints(128), nLast(nPoints-1)
00055 {
00056   lPMin=-8.;  // Min tabulated logarithmMomentum(D)
00057   lPMax= 8.;  // Max tabulated logarithmMomentum(D)
00058   dlnP=(lPMax-lPMin)/nLast;// LogStep inTheTable(D)
00059   onlyCS=true;// Flag toCalcul OnlyCS(not Si/Bi)(L)
00060   lastSIG=0.; // Last calculated cross section  (L)
00061   lastLP=-10.;// Last log(mom_of IncidentHadron)(L)
00062   lastTM=0.;  // Last t_maximum                 (L)
00063   theSS=0.;   // TheLastSqSlope of 1st difr.Max(L)
00064   theS1=0.;   // TheLastMantissa of 1st difr.Max(L)
00065   theB1=0.;   // TheLastSlope of 1st difruct.Max(L)
00066   theS2=0.;   // TheLastMantissa of 2nd difr.Max(L)
00067   theB2=0.;   // TheLastSlope of 2nd difruct.Max(L)
00068   theS3=0.;   // TheLastMantissa of 3d difr. Max(L)
00069   theB3=0.;   // TheLastSlope of 3d difruct. Max(L)
00070   theS4=0.;   // TheLastMantissa of 4th difr.Max(L)
00071   theB4=0.;   // TheLastSlope of 4th difruct.Max(L)
00072   lastTZ=0;   // Last atomic number of the target
00073   lastTN=0;   // Last # of neutrons in the target
00074   lastPIN=0.; // Last initialized max momentum
00075   lastCST=0;  // Elastic cross-section table
00076   lastPAR=0;  // ParametersForFunctionalCalculation
00077   lastSST=0;  // E-dep of SqaredSlope of 1st difMax
00078   lastS1T=0;  // E-dep of mantissa of 1st dif.Max
00079   lastB1T=0;  // E-dep of the slope of 1st difMax
00080   lastS2T=0;  // E-dep of mantissa of 2nd difrMax
00081   lastB2T=0;  // E-dep of the slope of 2nd difMax
00082   lastS3T=0;  // E-dep of mantissa of 3d difr.Max
00083   lastB3T=0;  // E-dep of the slope of 3d difrMax
00084   lastS4T=0;  // E-dep of mantissa of 4th difrMax
00085   lastB4T=0;  // E-dep of the slope of 4th difMax
00086   lastN=0;    // The last N of calculated nucleus
00087   lastZ=0;    // The last Z of calculated nucleus
00088   lastP=0.;   // LastUsed in cross section Momentum
00089   lastTH=0.;  // Last threshold momentum
00090   lastCS=0.;  // Last value of the Cross Section
00091   lastI=0;    // The last position in the DAMDB
00092 }

G4ChipsPionPlusElasticXS::~G4ChipsPionPlusElasticXS (  ) 

Definition at line 94 of file G4ChipsPionPlusElasticXS.cc.

00095 {
00096   std::vector<G4double*>::iterator pos;
00097   for (pos=CST.begin(); pos<CST.end(); pos++)
00098   { delete [] *pos; }
00099   CST.clear();
00100   for (pos=PAR.begin(); pos<PAR.end(); pos++)
00101   { delete [] *pos; }
00102   PAR.clear();
00103   for (pos=SST.begin(); pos<SST.end(); pos++)
00104   { delete [] *pos; }
00105   SST.clear();
00106   for (pos=S1T.begin(); pos<S1T.end(); pos++)
00107   { delete [] *pos; }
00108   S1T.clear();
00109   for (pos=B1T.begin(); pos<B1T.end(); pos++)
00110   { delete [] *pos; }
00111   B1T.clear();
00112   for (pos=S2T.begin(); pos<S2T.end(); pos++)
00113   { delete [] *pos; }
00114   S2T.clear();
00115   for (pos=B2T.begin(); pos<B2T.end(); pos++)
00116   { delete [] *pos; }
00117   B2T.clear();
00118   for (pos=S3T.begin(); pos<S3T.end(); pos++)
00119   { delete [] *pos; }
00120   S3T.clear();
00121   for (pos=B3T.begin(); pos<B3T.end(); pos++)
00122   { delete [] *pos; }
00123   B3T.clear();
00124   for (pos=S4T.begin(); pos<S4T.end(); pos++)
00125   { delete [] *pos; }
00126   S4T.clear();
00127   for (pos=B4T.begin(); pos<B4T.end(); pos++)
00128   { delete [] *pos; }
00129   B4T.clear();
00130 }


Member Function Documentation

static const char* G4ChipsPionPlusElasticXS::Default_Name (  )  [inline, static]

Definition at line 55 of file G4ChipsPionPlusElasticXS.hh.

Referenced by G4ChipsComponentXS::G4ChipsComponentXS(), and G4ChipsElasticModel::G4ChipsElasticModel().

00055 {return "ChipsPionPlusElasticXS";}

G4double G4ChipsPionPlusElasticXS::GetChipsCrossSection ( G4double  momentum,
G4int  Z,
G4int  N,
G4int  pdg 
) [virtual]

Definition at line 155 of file G4ChipsPionPlusElasticXS.cc.

Referenced by GetIsoCrossSection(), and G4ChipsElasticModel::SampleInvariantT().

00156 {
00157   static std::vector <G4int>    colN;  // Vector of N for calculated nuclei (isotops)
00158   static std::vector <G4int>    colZ;  // Vector of Z for calculated nuclei (isotops)
00159   static std::vector <G4double> colP;  // Vector of last momenta for the reaction
00160   static std::vector <G4double> colTH; // Vector of energy thresholds for the reaction
00161   static std::vector <G4double> colCS; // Vector of last cross sections for the reaction
00162   // ***---*** End of the mandatory Static Definitions of the Associative Memory ***---***
00163 
00164   G4double pEn=pMom;
00165   G4bool fCS = false;
00166   onlyCS=fCS;
00167 
00168   G4bool in=false;                   // By default the isotope must be found in the AMDB
00169   lastP   = 0.;                      // New momentum history (nothing to compare with)
00170   lastN   = tgN;                     // The last N of the calculated nucleus
00171   lastZ   = tgZ;                     // The last Z of the calculated nucleus
00172   lastI   = colN.size();             // Size of the Associative Memory DB in the heap
00173   if(lastI) for(G4int i=0; i<lastI; i++) // Loop over proj/tgZ/tgN lines of DB
00174   {                                  // The nucleus with projPDG is found in AMDB
00175     if(colN[i]==tgN && colZ[i]==tgZ) // Isotope is foind in AMDB
00176     {
00177       lastI=i;
00178       lastTH =colTH[i];              // Last THreshold (A-dependent)
00179       if(pEn<=lastTH)
00180       {
00181         return 0.;                   // Energy is below the Threshold value
00182       }
00183       lastP  =colP [i];              // Last Momentum  (A-dependent)
00184       lastCS =colCS[i];              // Last CrossSect (A-dependent)
00185       //  if(std::fabs(lastP/pMom-1.)<tolerance) //VI (do not use tolerance)
00186       if(lastP == pMom)              // Do not recalculate
00187       {
00188         CalculateCrossSection(fCS,-1,i,211,lastZ,lastN,pMom); // Update param's only
00189         return lastCS*millibarn;     // Use theLastCS
00190       }
00191       in = true;                       // This is the case when the isotop is found in DB
00192       // Momentum pMom is in IU ! @@ Units
00193       lastCS=CalculateCrossSection(fCS,-1,i,211,lastZ,lastN,pMom); // read & update
00194       if(lastCS<=0. && pEn>lastTH)    // Correct the threshold
00195       {
00196         lastTH=pEn;
00197       }
00198       break;                           // Go out of the LOOP with found lastI
00199     }
00200   } // End of attampt to find the nucleus in DB
00201   if(!in)                            // This nucleus has not been calculated previously
00202   {
00204     lastCS=CalculateCrossSection(fCS,0,lastI,211,lastZ,lastN,pMom);//calculate&create
00205     if(lastCS<=0.)
00206     {
00207       lastTH = 0; //ThresholdEnergy(tgZ, tgN); // The Threshold Energy which is now the last
00208       if(pEn>lastTH)
00209       {
00210         lastTH=pEn;
00211       }
00212     }
00213     colN.push_back(tgN);
00214     colZ.push_back(tgZ);
00215     colP.push_back(pMom);
00216     colTH.push_back(lastTH);
00217     colCS.push_back(lastCS);
00218     return lastCS*millibarn;
00219   } // End of creation of the new set of parameters
00220   else
00221   {
00222     colP[lastI]=pMom;
00223     colCS[lastI]=lastCS;
00224   }
00225   return lastCS*millibarn;
00226 }

G4double G4ChipsPionPlusElasticXS::GetExchangeT ( G4int  tZ,
G4int  tN,
G4int  pPDG 
)

Definition at line 601 of file G4ChipsPionPlusElasticXS.cc.

References G4cout, and G4UniformRand.

Referenced by G4ChipsElasticModel::SampleInvariantT().

00602 {
00603   static const G4double GeVSQ=gigaelectronvolt*gigaelectronvolt;
00604   static const G4double third=1./3.;
00605   static const G4double fifth=1./5.;
00606   static const G4double sevth=1./7.;
00607   if(PDG!= 211)G4cout<<"*Warning*G4ChipsPionPlusElasticXS::GetExT:PDG="<<PDG<<G4endl;
00608   if(onlyCS)G4cout<<"*Warning*G4ChipsPionPlusElasticXS::GetExchanT:onlyCS=1"<<G4endl;
00609   if(lastLP<-4.3) return lastTM*GeVSQ*G4UniformRand();// S-wave for p<14 MeV/c (kinE<.1MeV)
00610   G4double q2=0.;
00611   if(tgZ==1 && tgN==0)                // ===> p+p=p+p
00612   {
00613     G4double E1=lastTM*theB1;
00614     G4double R1=(1.-std::exp(-E1));
00615     G4double E2=lastTM*theB2;
00616     G4double R2=(1.-std::exp(-E2*E2*E2));
00617     G4double E3=lastTM*theB3;
00618     G4double R3=(1.-std::exp(-E3));
00619     G4double I1=R1*theS1/theB1;
00620     G4double I2=R2*theS2;
00621     G4double I3=R3*theS3;
00622     G4double I12=I1+I2;
00623     G4double rand=(I12+I3)*G4UniformRand();
00624     if     (rand<I1 )
00625     {
00626       G4double ran=R1*G4UniformRand();
00627       if(ran>1.) ran=1.;
00628       q2=-std::log(1.-ran)/theB1;
00629     }
00630     else if(rand<I12)
00631     {
00632       G4double ran=R2*G4UniformRand();
00633       if(ran>1.) ran=1.;
00634       q2=-std::log(1.-ran);
00635       if(q2<0.) q2=0.;
00636       q2=std::pow(q2,third)/theB2;
00637     }
00638     else
00639     {
00640       G4double ran=R3*G4UniformRand();
00641       if(ran>1.) ran=1.;
00642       q2=-std::log(1.-ran)/theB3;
00643     }
00644   }
00645   else
00646   {
00647     G4double a=tgZ+tgN;
00648     G4double E1=lastTM*(theB1+lastTM*theSS);
00649     G4double R1=(1.-std::exp(-E1));
00650     G4double tss=theSS+theSS; // for future solution of quadratic equation (imediate check)
00651     G4double tm2=lastTM*lastTM;
00652     G4double E2=lastTM*tm2*theB2;                   // power 3 for lowA, 5 for HighA (1st)
00653     if(a>6.5)E2*=tm2;                               // for heavy nuclei
00654     G4double R2=(1.-std::exp(-E2));
00655     G4double E3=lastTM*theB3;
00656     if(a>6.5)E3*=tm2*tm2*tm2;                       // power 1 for lowA, 7 (2nd) for HighA
00657     G4double R3=(1.-std::exp(-E3));
00658     G4double E4=lastTM*theB4;
00659     G4double R4=(1.-std::exp(-E4));
00660     G4double I1=R1*theS1;
00661     G4double I2=R2*theS2;
00662     G4double I3=R3*theS3;
00663     G4double I4=R4*theS4;
00664     G4double I12=I1+I2;
00665     G4double I13=I12+I3;
00666     G4double rand=(I13+I4)*G4UniformRand();
00667     if(rand<I1)
00668     {
00669       G4double ran=R1*G4UniformRand();
00670       if(ran>1.) ran=1.;
00671       q2=-std::log(1.-ran)/theB1;
00672       if(std::fabs(tss)>1.e-7) q2=(std::sqrt(theB1*(theB1+(tss+tss)*q2))-theB1)/tss;
00673     }
00674     else if(rand<I12)
00675     {
00676       G4double ran=R2*G4UniformRand();
00677       if(ran>1.) ran=1.;
00678       q2=-std::log(1.-ran)/theB2;
00679       if(q2<0.) q2=0.;
00680       if(a<6.5) q2=std::pow(q2,third);
00681       else      q2=std::pow(q2,fifth);
00682     }
00683     else if(rand<I13)
00684     {
00685       G4double ran=R3*G4UniformRand();
00686       if(ran>1.) ran=1.;
00687       q2=-std::log(1.-ran)/theB3;
00688       if(q2<0.) q2=0.;
00689       if(a>6.5) q2=std::pow(q2,sevth);
00690     }
00691     else
00692     {
00693       G4double ran=R4*G4UniformRand();
00694       if(ran>1.) ran=1.;
00695       q2=-std::log(1.-ran)/theB4;
00696       if(a<6.5) q2=lastTM-q2;                    // u reduced for lightA (starts from 0)
00697     }
00698   }
00699   if(q2<0.) q2=0.;
00700   if(!(q2>=-1.||q2<=1.)) G4cout<<"*NAN*G4QElasticCrossSect::GetExchangeT: -t="<<q2<<G4endl;
00701   if(q2>lastTM)
00702   {
00703     q2=lastTM;
00704   }
00705   return q2*GeVSQ;
00706 }

G4double G4ChipsPionPlusElasticXS::GetIsoCrossSection ( const G4DynamicParticle ,
G4int  tgZ,
G4int  A,
const G4Isotope iso = 0,
const G4Element elm = 0,
const G4Material mat = 0 
) [virtual]

Reimplemented from G4VCrossSectionDataSet.

Definition at line 143 of file G4ChipsPionPlusElasticXS.cc.

References GetChipsCrossSection(), and G4DynamicParticle::GetTotalMomentum().

00148 {
00149   G4double pMom=Pt->GetTotalMomentum();
00150   G4int tgN = A - tgZ;
00151   
00152   return GetChipsCrossSection(pMom, tgZ, tgN, 211);
00153 }

G4bool G4ChipsPionPlusElasticXS::IsIsoApplicable ( const G4DynamicParticle Pt,
G4int  Z,
G4int  A,
const G4Element elm,
const G4Material mat 
) [virtual]

Reimplemented from G4VCrossSectionDataSet.

Definition at line 132 of file G4ChipsPionPlusElasticXS.cc.

References G4DynamicParticle::GetDefinition(), and G4PionPlus::PionPlus().

00135 {
00136   G4ParticleDefinition* particle = Pt->GetDefinition();
00137   if (particle == G4PionPlus::PionPlus()      ) return true;
00138   return false;
00139 }


The documentation for this class was generated from the following files:
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