G4ChipsPionMinusInelasticXS Class Reference

#include <G4ChipsPionMinusInelasticXS.hh>

Inheritance diagram for G4ChipsPionMinusInelasticXS:

Collaboration diagram for G4ChipsPionMinusInelasticXS:

Public Member Functions
	G4ChipsPionMinusInelasticXS ()
	~G4ChipsPionMinusInelasticXS ()
virtual void	CrossSectionDescription (std::ostream &) const
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)
Public Member Functions inherited from G4VCrossSectionDataSet
	G4VCrossSectionDataSet (const G4String &nam="")
virtual	~G4VCrossSectionDataSet ()
virtual G4bool	IsElementApplicable (const G4DynamicParticle *, G4int Z, const G4Material *mat=0)
G4double	GetCrossSection (const G4DynamicParticle *, const G4Element *, const G4Material *mat=0)
G4double	ComputeCrossSection (const G4DynamicParticle *, const G4Element *, const G4Material *mat=0)
virtual G4double	GetElementCrossSection (const G4DynamicParticle *, G4int Z, const G4Material *mat=0)
virtual G4Isotope *	SelectIsotope (const G4Element *, G4double kinEnergy)
virtual void	BuildPhysicsTable (const G4ParticleDefinition &)
virtual void	DumpPhysicsTable (const G4ParticleDefinition &)
virtual G4int	GetVerboseLevel () const
virtual void	SetVerboseLevel (G4int value)
G4double	GetMinKinEnergy () const
void	SetMinKinEnergy (G4double value)
G4double	GetMaxKinEnergy () const
void	SetMaxKinEnergy (G4double value)
const G4String &	GetName () const

Static Public Member Functions
static const char *	Default_Name ()

Private Member Functions
G4double	CalculateCrossSection (G4int F, G4int I, G4int PDG, G4int Z, G4int N, G4double Momentum)
G4int	GetFunctions (G4int tZ, G4int tN, G4double *y, G4double *z)
G4double	CrossSectionLin (G4int targZ, G4int targN, G4double P)
G4double	CrossSectionLog (G4int targZ, G4int targN, G4double lP)
G4double	CrossSectionFormula (G4int targZ, G4int targN, G4double P, G4double lP)
G4double	ThresholdMomentum (G4int targZ, G4int targN)
G4double	EquLinearFit (G4double X, G4int N, G4double X0, G4double DX, G4double *Y)

Private Attributes
G4double	lastSig
G4double *	lastLEN
G4double *	lastHEN
G4double	lastE
G4int	lastPDG
G4int	lastN
G4int	lastZ
G4double	lastP
G4double	lastTH
G4double	lastCS
G4int	lastI
std::vector< G4double * > *	LEN
std::vector< G4double * > *	HEN
G4int	j
std::vector< G4int >	colN
std::vector< G4int >	colZ
std::vector< G4double >	colP
std::vector< G4double >	colTH
std::vector< G4double >	colCS

Additional Inherited Members
Protected Member Functions inherited from G4VCrossSectionDataSet
void	SetName (const G4String &)
Protected Attributes inherited from G4VCrossSectionDataSet
G4int	verboseLevel

Detailed Description

Definition at line 47 of file G4ChipsPionMinusInelasticXS.hh.

Constructor & Destructor Documentation

G4ChipsPionMinusInelasticXS()

G4ChipsPionMinusInelasticXS::G4ChipsPionMinusInelasticXS

(

)

Definition at line 55 of file G4ChipsPionMinusInelasticXS.cc.

                                                        :G4VCrossSectionDataSet("ChipsPionMinusInelasticXS")
{
  // Initialization of the
  lastLEN=0; // Pointer to lastArray of LowEn CS
  lastHEN=0; // Pointer to lastArray of HighEn CS
  lastN=0;   // The last N of calculated nucleus
  lastZ=0;   // The last Z of calculated nucleus
  lastP=0.;  // Last used cross section Momentum
  lastTH=0.; // Last threshold momentum
  lastCS=0.; // Last value of the Cross Section
  lastI=0;   // The last position in the DAMDB
  LEN = new std::vector<G4double*>;
  HEN = new std::vector<G4double*>;
}

~G4ChipsPionMinusInelasticXS()

G4ChipsPionMinusInelasticXS::~G4ChipsPionMinusInelasticXS

(

)

Definition at line 70 of file G4ChipsPionMinusInelasticXS.cc.

{
  G4int lens=LEN->size();
  for(G4int i=0; i<lens; ++i) delete[] (*LEN)[i];
  delete LEN;
  G4int hens=HEN->size();
  for(G4int i=0; i<hens; ++i) delete[] (*HEN)[i];
  delete HEN;
}

Member Function Documentation

CalculateCrossSection()

G4double G4ChipsPionMinusInelasticXS::CalculateCrossSection ( G4int  F, G4int  I, G4int  PDG, G4int  Z, G4int  N, G4double  Momentum  )

private

Definition at line 180 of file G4ChipsPionMinusInelasticXS.cc.

{
  static const G4double THmin=27.;     // default minimum Momentum (MeV/c) Threshold
  static const G4double THmiG=THmin*.001; // minimum Momentum (GeV/c) Threshold
  static const G4double dP=10.;        // step for the LEN (Low ENergy) table MeV/c
  static const G4double dPG=dP*.001;   // step for the LEN (Low ENergy) table GeV/c
  static const G4int    nL=105;        // A#of LEN points in E (step 10 MeV/c)
  static const G4double Pmin=THmin+(nL-1)*dP; // minP for the HighE part with safety
  static const G4double Pmax=227000.;  // maxP for the HEN (High ENergy) part 227 GeV
  static const G4int    nH=224;        // A#of HEN points in lnE
  static const G4double milP=G4Log(Pmin);// Low logarithm energy for the HEN part
  static const G4double malP=G4Log(Pmax);// High logarithm energy (each 2.75 percent)
  static const G4double dlP=(malP-milP)/(nH-1); // Step in log energy in the HEN part
  static const G4double milPG=G4Log(.001*Pmin);// Low logarithmEnergy for HEN part GeV/c
  G4double sigma=0.;
  if(F&&I) sigma=0.;                   // @@ *!* Fake line *!* to use F & I !!!Temporary!!!
  //G4double A=targN+targZ;              // A of the target
  if(F<=0)                             // This isotope was not the last used isotop
  {
    if(F<0)                            // This isotope was found in DAMDB =-----=> RETRIEVE
    {
      G4int sync=LEN->size();
      if(sync<=I) G4cerr<<"*!*G4ChipsPiMinusNuclCS::CalcCrosSect:Sync="<<sync<<"<="<<I<<G4endl;
      lastLEN=(*LEN)[I];               // Pointer to prepared LowEnergy cross sections
      lastHEN=(*HEN)[I];               // Pointer to prepared High Energy cross sections
    }
    else                               // This isotope wasn't calculated before => CREATE
    {
      lastLEN = new G4double[nL];      // Allocate memory for the new LEN cross sections
      lastHEN = new G4double[nH];      // Allocate memory for the new HEN cross sections
      // --- Instead of making a separate function ---
      G4double P=THmiG;                // Table threshold in GeV/c
     for(G4int k=0; k<nL; k++)
      {
        lastLEN[k] = CrossSectionLin(targZ, targN, P);
        P+=dPG;
      }
      G4double lP=milPG;
      for(G4int n=0; n<nH; n++)
      {
        lastHEN[n] = CrossSectionLog(targZ, targN, lP);
        lP+=dlP;
      }
      // --- End of possible separate function
      // *** The synchronization check ***
      G4int sync=LEN->size();
      if(sync!=I)
      {
        G4cerr<<"***G4ChipsPiMinusNuclCS::CalcCrossSect: Sinc="<<sync<<"#"<<I<<", Z=" <<targZ
              <<", N="<<targN<<", F="<<F<<G4endl;
        //G4Exception("G4PiMinusNuclearCS::CalculateCS:","39",FatalException,"DBoverflow");
      }
      LEN->push_back(lastLEN);         // remember the Low Energy Table
      HEN->push_back(lastHEN);         // remember the High Energy Table
    } // End of creation of the new set of parameters
  } // End of parameters udate
  // =---------------------= NOW the Magic Formula =---------------------------=
  if (Momentum<lastTH) return 0.;      // It must be already checked in the interface class
  else if (Momentum<Pmin)              // High Energy region
  {
    sigma=EquLinearFit(Momentum,nL,THmin,dP,lastLEN);
  }
  else if (Momentum<Pmax)              // High Energy region
  {
    G4double lP=G4Log(Momentum);
    sigma=EquLinearFit(lP,nH,milP,dlP,lastHEN);
  }
  else                                 // UHE region (calculation, not frequent)
  {
    G4double P=0.001*Momentum;         // Approximation formula is for P in GeV/c
    sigma=CrossSectionFormula(targZ, targN, P, G4Log(P));
  }
  if(sigma<0.) return 0.;
  return sigma;
}

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CrossSectionDescription()

void G4ChipsPionMinusInelasticXS::CrossSectionDescription ( std::ostream &  outFile ) const

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 81 of file G4ChipsPionMinusInelasticXS.cc.

{
    outFile << "G4ChipsPionMinusInelasticXS provides the inelastic cross\n"
            << "section for pion- nucleus scattering as a function of incident\n"
            << "momentum. The cross section is calculated using M. Kossov's\n"
            << "CHIPS parameterization of cross section data.\n";
}

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CrossSectionFormula()

G4double G4ChipsPionMinusInelasticXS::CrossSectionFormula ( G4int  targZ, G4int  targN, G4double  P, G4double  lP  )

private

Definition at line 271 of file G4ChipsPionMinusInelasticXS.cc.

{
  G4double sigma=0.;
  if(tZ==1 && !tN)                        // PiMin-Proton interaction from G4QuasiElRatios
  {
    G4double lr=lP+1.27;                    // From G4QuasiFreeRatios.cc Uzhi
    G4double LE=1.53/(lr*lr+.0676);         // From G4QuasiFreeRatios.cc Uzhi
    G4double ld=lP-3.5;
    G4double ld2=ld*ld;
    G4double p2=P*P;
    G4double p4=p2*p2;
    G4double sp=std::sqrt(P);
    G4double lm=lP+.36;
    G4double md=lm*lm+.04;
    G4double lh=lP-.017;
    G4double hd=lh*lh+.0025;
    G4double El=(.0557*ld2+2.4+7./sp)/(1.+.7/p4);
    G4double To=(.3*ld2+22.3+12./sp)/(1.+.4/p4);
    sigma=(To-El)+.4/md+.01/hd;
    sigma+=LE*2;                            //  Uzhi       
  }
  else if(tZ==1 && tN==1)                   // pimp_tot
  {
    G4double p2=P*P;
    G4double d=lP-2.7;
    G4double f=lP+1.25;
    G4double gg=lP-.017;
    sigma=(.55*d*d+38.+23./std::sqrt(P))/(1.+.3/p2/p2)+18./(f*f+.1089)+.02/(gg*gg+.0025);
  }
  else if(tZ<97 && tN<152)                // General solution
  {
    G4double d=lP-4.2;
    G4double p2=P*P;
    G4double p4=p2*p2;
    G4double a=tN+tZ;                     // A of the target
    G4double al=G4Log(a);
    G4double sa=std::sqrt(a);
    G4double ssa=std::sqrt(sa);
    G4double a2=a*a;
    G4double c=41.*G4Exp(al*.68)*(1.+44./a2)/(1.+8./a)/(1.+200./a2/a2);
    G4double f=120*sa/(1.+24./a/ssa);
    G4double gg=-1.32-al*.043;
    G4double u=lP-gg;
    G4double h=al*(.388-.046*al);
    sigma=(c+d*d)/(1.+.17/p4)+f/(u*u+h*h);
  }
  else
  {
    G4cerr<<"-Warning-G4ChipsPiMinusNuclearCroSect::CSForm:*Bad A* Z="<<tZ<<", N="<<tN<<G4endl;
    sigma=0.;
  }
  if(sigma<0.) return 0.;
  return sigma;  
}

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CrossSectionLin()

G4double G4ChipsPionMinusInelasticXS::CrossSectionLin ( G4int  targZ, G4int  targN, G4double  P  )

private

Definition at line 258 of file G4ChipsPionMinusInelasticXS.cc.

{
  G4double lP=G4Log(P);
  return CrossSectionFormula(tZ, tN, P, lP);
}

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CrossSectionLog()

G4double G4ChipsPionMinusInelasticXS::CrossSectionLog ( G4int  targZ, G4int  targN, G4double  lP  )

private

Definition at line 265 of file G4ChipsPionMinusInelasticXS.cc.

{
  G4double P=G4Exp(lP);
  return CrossSectionFormula(tZ, tN, P, lP);
}

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Default_Name()

static const char* G4ChipsPionMinusInelasticXS::Default_Name ( )

inlinestatic

Definition at line 55 of file G4ChipsPionMinusInelasticXS.hh.

{return "ChipsPionMinusInelasticXS";}

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EquLinearFit()

G4double G4ChipsPionMinusInelasticXS::EquLinearFit ( G4double  X, G4int  N, G4double  X0, G4double  DX, G4double *  Y  )

private

Definition at line 327 of file G4ChipsPionMinusInelasticXS.cc.

{
  if(DX<=0. || N<2)
    {
      G4cerr<<"***G4ChipsPionMinusInelasticXS::EquLinearFit: DX="<<DX<<", N="<<N<<G4endl;
      return Y[0];
    }
  
  G4int    N2=N-2;
  G4double d=(X-X0)/DX;
  G4int         jj=static_cast<int>(d);
  if     (jj<0)  jj=0;
  else if(jj>N2) jj=N2;
  d-=jj; // excess
  G4double yi=Y[jj];
  G4double sigma=yi+(Y[jj+1]-yi)*d;
  
  return sigma;
}

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GetChipsCrossSection()

G4double G4ChipsPionMinusInelasticXS::GetChipsCrossSection ( G4double  momentum, G4int  Z, G4int  N, G4int  pdg  )

virtual

!The slave functions must provide cross-sections in millibarns (mb) !! (not in IU)

Definition at line 109 of file G4ChipsPionMinusInelasticXS.cc.

{

  G4bool in=false;                     // By default the isotope must be found in the AMDB
  if(tgN!=lastN || tgZ!=lastZ)         // The nucleus was not the last used isotope
  {
    in = false;                        // By default the isotope haven't be found in AMDB  
    lastP   = 0.;                      // New momentum history (nothing to compare with)
    lastN   = tgN;                     // The last N of the calculated nucleus
    lastZ   = tgZ;                     // The last Z of the calculated nucleus
    lastI   = colN.size();             // Size of the Associative Memory DB in the heap
    j  = 0;                            // A#0f records found in DB for this projectile
    if(lastI) for(G4int i=0; i<lastI; i++) // AMDB exists, try to find the (Z,N) isotope
    {
      if(colN[i]==tgN && colZ[i]==tgZ) // Try the record "i" in the AMDB
      {
        lastI=i;                       // Remember the index for future fast/last use
        lastTH =colTH[i];              // The last THreshold (A-dependent)
        if(pMom<=lastTH)
        {
          return 0.;                   // Energy is below the Threshold value
        }
        lastP  =colP [i];              // Last Momentum  (A-dependent)
        lastCS =colCS[i];              // Last CrossSect (A-dependent)
        in = true;                     // This is the case when the isotop is found in DB
        // Momentum pMom is in IU ! @@ Units
        lastCS=CalculateCrossSection(-1,j,-211,lastZ,lastN,pMom); // read & update
        if(lastCS<=0. && pMom>lastTH)  // Correct the threshold (@@ No intermediate Zeros)
        {
          lastCS=0.;
          lastTH=pMom;
        }
        break;                         // Go out of the LOOP
      }
      j++;                             // Increment a#0f records found in DB
    }
    if(!in)                            // This isotope has not been calculated previously
    {
      lastCS=CalculateCrossSection(0,j,-211,lastZ,lastN,pMom); //calculate & create
      //if(lastCS>0.)                   // It means that the AMBD was initialized
      //{

      lastTH = 0; //ThresholdEnergy(tgZ, tgN); // The Threshold Energy which is now the last
        colN.push_back(tgN);
        colZ.push_back(tgZ);
        colP.push_back(pMom);
        colTH.push_back(lastTH);
        colCS.push_back(lastCS);
      //} // M.K. Presence of H1 with high threshold breaks the syncronization
      return lastCS*millibarn;
    } // End of creation of the new set of parameters
    else
    {
      colP[lastI]=pMom;
      colCS[lastI]=lastCS;
    }
  } // End of parameters udate
  else if(pMom<=lastTH)
  {
    return 0.;                         // Momentum is below the Threshold Value -> CS=0
  }
  else                                 // It is the last used -> use the current tables
  {
    lastCS=CalculateCrossSection(1,j,-211,lastZ,lastN,pMom); // Only read and UpdateDB
    lastP=pMom;
  }
  return lastCS*millibarn;
}

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GetFunctions()

G4int G4ChipsPionMinusInelasticXS::GetFunctions ( G4int  tZ, G4int  tN, G4double *  y, G4double *  z  )

private

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GetIsoCrossSection()

G4double G4ChipsPionMinusInelasticXS::GetIsoCrossSection ( const G4DynamicParticle *  Pt, G4int  tgZ, G4int  A, const G4Isotope *  iso = 0, const G4Element *  elm = 0, const G4Material *  mat = 0  )

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 98 of file G4ChipsPionMinusInelasticXS.cc.

{
  G4double pMom=Pt->GetTotalMomentum();
  G4int tgN = A - tgZ;
  
  return GetChipsCrossSection(pMom, tgZ, tgN, -211);
}

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IsIsoApplicable()

G4bool G4ChipsPionMinusInelasticXS::IsIsoApplicable ( const G4DynamicParticle *  Pt, G4int  Z, G4int  A, const G4Element *  elm, const G4Material *  mat  )

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 89 of file G4ChipsPionMinusInelasticXS.cc.

{
  return true;
}

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ThresholdMomentum()

G4double G4ChipsPionMinusInelasticXS::ThresholdMomentum ( G4int  targZ, G4int  targN  )

private

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Member Data Documentation

colCS

std::vector<G4double> G4ChipsPionMinusInelasticXS::colCS

private

Definition at line 102 of file G4ChipsPionMinusInelasticXS.hh.

colN

std::vector<G4int> G4ChipsPionMinusInelasticXS::colN

private

Definition at line 98 of file G4ChipsPionMinusInelasticXS.hh.

colP

std::vector<G4double> G4ChipsPionMinusInelasticXS::colP

private

Definition at line 100 of file G4ChipsPionMinusInelasticXS.hh.

colTH

std::vector<G4double> G4ChipsPionMinusInelasticXS::colTH

private

Definition at line 101 of file G4ChipsPionMinusInelasticXS.hh.

colZ

std::vector<G4int> G4ChipsPionMinusInelasticXS::colZ

private

Definition at line 99 of file G4ChipsPionMinusInelasticXS.hh.

HEN

std::vector<G4double*>* G4ChipsPionMinusInelasticXS::HEN

private

Definition at line 95 of file G4ChipsPionMinusInelasticXS.hh.

j

G4int G4ChipsPionMinusInelasticXS::j

private

Definition at line 97 of file G4ChipsPionMinusInelasticXS.hh.

lastCS

G4double G4ChipsPionMinusInelasticXS::lastCS

private

Definition at line 92 of file G4ChipsPionMinusInelasticXS.hh.

lastE

G4double G4ChipsPionMinusInelasticXS::lastE

private

Definition at line 86 of file G4ChipsPionMinusInelasticXS.hh.

lastHEN

G4double* G4ChipsPionMinusInelasticXS::lastHEN

private

Definition at line 85 of file G4ChipsPionMinusInelasticXS.hh.

lastI

G4int G4ChipsPionMinusInelasticXS::lastI

private

Definition at line 93 of file G4ChipsPionMinusInelasticXS.hh.

lastLEN

G4double* G4ChipsPionMinusInelasticXS::lastLEN

private

Definition at line 84 of file G4ChipsPionMinusInelasticXS.hh.

lastN

G4int G4ChipsPionMinusInelasticXS::lastN

private

Definition at line 88 of file G4ChipsPionMinusInelasticXS.hh.

lastP

G4double G4ChipsPionMinusInelasticXS::lastP

private

Definition at line 90 of file G4ChipsPionMinusInelasticXS.hh.

lastPDG

G4int G4ChipsPionMinusInelasticXS::lastPDG

private

Definition at line 87 of file G4ChipsPionMinusInelasticXS.hh.

lastSig

G4double G4ChipsPionMinusInelasticXS::lastSig

private

Definition at line 83 of file G4ChipsPionMinusInelasticXS.hh.

lastTH

G4double G4ChipsPionMinusInelasticXS::lastTH

private

Definition at line 91 of file G4ChipsPionMinusInelasticXS.hh.

lastZ

G4int G4ChipsPionMinusInelasticXS::lastZ

private

Definition at line 89 of file G4ChipsPionMinusInelasticXS.hh.

LEN

std::vector<G4double*>* G4ChipsPionMinusInelasticXS::LEN

private

Definition at line 94 of file G4ChipsPionMinusInelasticXS.hh.

---

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

• G4ChipsPionMinusInelasticXS.hh
• G4ChipsPionMinusInelasticXS.cc