Import Geant4 0.0.0 source tree

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+// This code implementation is the intellectual property of
+// the RD44 GEANT4 collaboration.
+//
+// By copying, distributing or modifying the Program (or any work
+// based on the Program) you indicate your acceptance of this statement,
+// and all its terms.
+//
+// $Id: G4IonisParamMat.cc,v 2.5 1998/10/05 14:33:14 maire Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+// 
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+
+// 18-07-98, bug corrected in ComputeDensityEffect() for gas
+// 09-07-98, data moved from G4Material, M.Maire
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+
+#include "G4IonisParamMat.hh"
+#include "G4Material.hh"
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+
+G4IonisParamMat::G4IonisParamMat(G4Material* material)
+:fMaterial(material)
+{
+  ComputeMeanParameters();
+  ComputeDensityEffect();
+  ComputeFluctModel();
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+
+void G4IonisParamMat::ComputeMeanParameters()
+{
+  // compute mean excitation energy and shell correction vector
+
+  fTaul = (*(fMaterial->GetElementVector()))[0]->GetIonisation()->GetTaul();
+  fLogMeanExcEnergy = 0.;
+
+  for (G4int i=0; i < fMaterial->GetNumberOfElements(); i++)
+    fLogMeanExcEnergy += (fMaterial->GetVecNbOfAtomsPerVolume())[i]
+                   *((*(fMaterial->GetElementVector()))[i]->GetZ())
+                   *log((*(fMaterial->GetElementVector()))[i]->GetIonisation()
+                                                             ->GetMeanExcitationEnergy());
+
+  fLogMeanExcEnergy /= fMaterial->GetTotNbOfElectPerVolume();
+  fMeanExcitationEnergy = exp(fLogMeanExcEnergy);
+
+  fShellCorrectionVector = new G4double[3];
+
+  for (G4int j=0; j<=2; j++)
+  {
+    fShellCorrectionVector[j] = 0.;
+
+    for (G4int k=0; k<fMaterial->GetNumberOfElements(); k++)
+      fShellCorrectionVector[j] += (fMaterial->GetVecNbOfAtomsPerVolume())[k] 
+              *((*(fMaterial->GetElementVector()))[k]->GetIonisation()
+                                                     ->GetShellCorrectionVector()[j]);
+     
+    fShellCorrectionVector[j] /= fMaterial->GetTotNbOfElectPerVolume();
+  } 
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+                    
+void G4IonisParamMat::ComputeDensityEffect()
+{
+  // Compute parameters for the density effect correction in DE/Dx formula.
+  // The parametrization is from R.M. Sternheimer, Phys. Rev.B,3:3681 (1971)
+
+  const G4double Cd2 = 4*pi*hbarc_squared*classic_electr_radius;
+  const G4double twoln10 = 2.*log(10.);
+
+  G4int icase;
+  
+  fCdensity = 1. + log(fMeanExcitationEnergy*fMeanExcitationEnergy
+              /(Cd2*fMaterial->GetTotNbOfElectPerVolume()));
+
+  //
+  // condensed materials
+  //
+  G4State State = fMaterial->GetState();
+  
+  if ((State == kStateSolid)||(State == kStateLiquid)) {
+
+      const G4double E100keV  = 100.*keV; 
+      const G4double ClimiS[] = {3.681 , 5.215 };
+      const G4double X0valS[] = {1.0   , 1.5   };
+      const G4double X1valS[] = {2.0   , 3.0   };
+                                
+      if(fMeanExcitationEnergy < E100keV) icase = 0 ;
+         else                             icase = 1 ;
+
+      if(fCdensity < ClimiS[icase]) fX0density = 0.2;
+         else                       fX0density = 0.326*fCdensity-X0valS[icase];
+
+      fX1density = X1valS[icase] ; fMdensity = 3.0;
+      
+      //special: Hydrogen
+      if ((fMaterial->GetNumberOfElements()==1)&&(fMaterial->GetZ()==1.)) {
+         fX0density = 0.425; fX1density = 2.0; fMdensity = 5.949;
+      }
+  }
+
+  //
+  // gases
+  //
+  if (State == kStateGas) { 
+
+      const G4double ClimiG[] = { 10. , 10.5 , 11. , 11.5 , 12.25 , 13.804};
+      const G4double X0valG[] = { 1.6 , 1.7 ,  1.8 ,  1.9 , 2.0   ,  2.0 };
+      const G4double X1valG[] = { 4.0 , 4.0 ,  4.0 ,  4.0 , 4.0   ,  5.0 };
+
+      icase = 5;
+      fX0density = 0.326*fCdensity-2.5 ; fX1density = 5.0 ; fMdensity = 3. ; 
+      while((icase > 0)&&(fCdensity < ClimiG[icase])) icase-- ;
+      fX0density = X0valG[icase]  ; fX1density = X1valG[icase] ;
+      
+      //special: Hydrogen
+      if ((fMaterial->GetNumberOfElements()==1)&&(fMaterial->GetZ()==1.)) {
+         fX0density = 1.837; fX1density = 3.0; fMdensity = 4.754;
+      }
+      
+      //special: Helium
+      if ((fMaterial->GetNumberOfElements()==1)&&(fMaterial->GetZ()==2.)) {
+         fX0density = 2.191; fX1density = 3.0; fMdensity = 3.297;
+      }
+
+      // change parameters if the gas is not in STP.
+      // For the correction the density(STP) is needed. Density(STP) is calculated here : 
+      
+      G4double Density  = fMaterial->GetDensity();
+      G4double Pressure = fMaterial->GetPressure();
+      G4double Temp     = fMaterial->GetTemperature();
+      
+      G4double DensitySTP = Density*STP_Pressure*Temp/(Pressure*STP_Temperature);
+
+      G4double ParCorr = log(Density/DensitySTP) ;
+  
+      fCdensity  -= ParCorr;
+      fX0density -= ParCorr/twoln10 ;
+      fX1density -= ParCorr/twoln10 ;
+  }
+
+  G4double Xa = fCdensity/twoln10 ;
+  fAdensity = twoln10*(Xa-fX0density)
+              /pow((fX1density-fX0density),fMdensity);
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+
+void G4IonisParamMat::ComputeFluctModel()
+{
+  // compute parameters for the energy loss fluctuation model
+
+  // need an 'effective Z' ?????
+  G4double Zeff = 0.;
+  for (G4int i=0;i<fMaterial->GetNumberOfElements();i++) 
+     Zeff += (fMaterial->GetFractionVector())[i]
+             *((*(fMaterial->GetElementVector()))[i]->GetZ());
+
+  if (Zeff > 2.) fF2fluct = 2./Zeff ;
+    else         fF2fluct = 0.;
+
+  fF1fluct         = 1. - fF2fluct;
+  fEnergy2fluct    = 10.*Zeff*Zeff*eV;
+  fLogEnergy2fluct = log(fEnergy2fluct);
+  fLogEnergy1fluct = (fLogMeanExcEnergy - fF2fluct*fLogEnergy2fluct)
+                     /fF1fluct;
+  fEnergy1fluct    = exp(fLogEnergy1fluct);
+  fEnergy0fluct    = 10.*eV;
+  fRateionexcfluct = 0.4;
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+
+G4IonisParamMat::~G4IonisParamMat()
+{ }
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+
+G4IonisParamMat::G4IonisParamMat(const G4IonisParamMat &right)
+{
+    *this = right;
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+
+const G4IonisParamMat & G4IonisParamMat::operator=(const G4IonisParamMat &right)
+{
+  return right;
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+
+G4int G4IonisParamMat::operator==(const G4IonisParamMat &right) const
+{
+  return (this == (G4IonisParamMat *) &right);
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+
+G4int G4IonisParamMat::operator!=(const G4IonisParamMat &right) const
+{
+  return (this != (G4IonisParamMat *) &right);
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
+