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geant4/source/materials/src/G4IonisParamElm.cc
T
Gabriele Cosmo 216a75eeb1 Import Geant4 8.1.0 source tree
2016-06-09 14:44:26 +02:00

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//
// ********************************************************************
// * License and Disclaimer *
// * *
// * The Geant4 software is copyright of the Copyright Holders of *
// * the Geant4 Collaboration. It is provided under the terms and *
// * conditions of the Geant4 Software License, included in the file *
// * LICENSE and available at http://cern.ch/geant4/license . These *
// * include a list of copyright holders. *
// * *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work make any representation or warranty, express or implied, *
// * regarding this software system or assume any liability for its *
// * use. Please see the license in the file LICENSE and URL above *
// * for the full disclaimer and the limitation of liability. *
// * *
// * This code implementation is the result of the scientific and *
// * technical work of the GEANT4 collaboration. *
// * By using, copying, modifying or distributing the software (or *
// * any work based on the software) you agree to acknowledge its *
// * use in resulting scientific publications, and indicate your *
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
//
// $Id: G4IonisParamElm.cc,v 1.14 2006/06/29 19:12:43 gunter Exp $
// GEANT4 tag $Name: geant4-08-01 $
//
//
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
//
// 06-09-04, Update calculated values after any change of ionisation
// potential change. V.Ivanchenko
// 17-10-02, Fix excitation energy interpolation. V.Ivanchenko
// 08-03-01, correct handling of fShellCorrectionVector. M.Maire
// 22-11-00, tabulation of ionisation potential from
// the ICRU Report N#37. V.Ivanchenko
// 09-07-98, data moved from G4Element. M.Maire
//
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
#include "G4IonisParamElm.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
G4IonisParamElm::G4IonisParamElm(G4double Z)
{
if (Z < 1.) G4Exception
(" ERROR! It is not allowed to create an Element with Z < 1" );
// some basic functions of the atomic number
fZ = Z;
fZ3 = std::pow(fZ, 1./3.);
fZZ3 = std::pow(fZ*(fZ+1.), 1./3.);
flogZ3 = std::log(fZ)/3.;
// Parameters for energy loss by ionisation
// Mean excitation energy
// from "Stopping Powers for Electrons and Positrons"
// ICRU Report N#37, 1984 (energy in eV)
static double exc[100] = {
21.8, 20.9, 13.3, 15.9, 15.2, 13.0, 11.7, 11.9, 11.5, 13.7,
13.6, 13.0, 12.8, 12.4, 11.5, 11.3, 10.2, 10.4, 10.0, 9.6,
10.3, 10.6, 10.7, 10.7, 10.9, 11.0, 11.0, 11.1, 11.1, 11.0,
10.8, 10.4, 10.5, 10.2, 9.8, 9.8, 9.8, 9.6, 9.7, 9.8,
10.2, 10.1, 10.0, 10.0, 10.0, 10.2, 10.0, 9.8, 10.0, 9.8,
9.5, 9.3, 9.3, 8.9, 8.9, 8.8, 8.8, 8.8, 9.1, 9.1,
9.2, 9.3, 9.2, 9.2, 9.4, 9.5, 9.7, 9.7, 9.8, 9.8,
9.8, 9.8, 9.8, 9.8, 9.8, 9.8, 9.8, 10.1, 10.0, 10.0,
10.0, 10.0, 9.9, 9.9, 9.7, 9.2, 9.5, 9.4, 9.4, 9.4,
9.6, 9.7, 9.7, 9.8, 9.8, 9.8, 9.8, 9.9, 9.9, 9.9 };
G4int iz = (G4int)Z - 1 ;
if(0 > iz) iz = 0;
else if(99 < iz) iz = 99 ;
fMeanExcitationEnergy = fZ * exc[iz] * eV ;
fTau0 = 0.1*fZ3*MeV/proton_mass_c2;
fTaul = 2.*MeV/proton_mass_c2;
// compute the Bethe-Bloch formula for energy = fTaul*particle mass
G4double rate = fMeanExcitationEnergy/electron_mass_c2 ;
G4double w = fTaul*(fTaul+2.) ;
fBetheBlochLow = (fTaul+1.)*(fTaul+1.)*std::log(2.*w/rate)/w - 1. ;
fBetheBlochLow = 2.*fZ*twopi_mc2_rcl2*fBetheBlochLow ;
fClow = std::sqrt(fTaul)*fBetheBlochLow;
fAlow = 6.458040 * fClow/fTau0;
G4double Taum = 0.035*fZ3*MeV/proton_mass_c2;
fBlow =-3.229020*fClow/(fTau0*std::sqrt(Taum));
// Shell correction factors
fShellCorrectionVector = new G4double[3]; //[3]
rate = 0.001*fMeanExcitationEnergy/eV;
G4double rate2 = rate*rate;
/*
fShellCorrectionVector[0] = ( 1.10289e5 + 5.14781e8*rate)*rate2 ;
fShellCorrectionVector[1] = ( 7.93805e3 - 2.22565e7*rate)*rate2 ;
fShellCorrectionVector[2] = (-9.92256e1 + 2.10823e5*rate)*rate2 ;
*/
fShellCorrectionVector[0] = ( 0.422377 + 3.858019*rate)*rate2 ;
fShellCorrectionVector[1] = ( 0.0304043 - 0.1667989*rate)*rate2 ;
fShellCorrectionVector[2] = (-0.00038106 + 0.00157955*rate)*rate2 ;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
// Fake default constructor - sets only member data and allocates memory
// for usage restricted to object persistency
G4IonisParamElm::G4IonisParamElm(__void__&)
: fShellCorrectionVector(0)
{
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
G4IonisParamElm::~G4IonisParamElm()
{
if (fShellCorrectionVector) delete [] fShellCorrectionVector;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
G4IonisParamElm::G4IonisParamElm(G4IonisParamElm& right)
{
*this = right;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
const G4IonisParamElm& G4IonisParamElm::operator=(const G4IonisParamElm& right)
{
if (this != &right)
{
fZ = right.fZ;
fZ3 = right.fZ3;
fZZ3 = right.fZZ3;
flogZ3 = right.flogZ3;
fTau0 = right.fTau0;
fTaul = right.fTaul;
fBetheBlochLow = right.fBetheBlochLow;
fAlow = right.fAlow;
fBlow = right.fBlow;
fClow = right.fClow;
fMeanExcitationEnergy = right.fMeanExcitationEnergy;
if (fShellCorrectionVector) delete [] fShellCorrectionVector;
fShellCorrectionVector = new G4double[3];
fShellCorrectionVector[0] = right.fShellCorrectionVector[0];
fShellCorrectionVector[1] = right.fShellCorrectionVector[1];
fShellCorrectionVector[2] = right.fShellCorrectionVector[2];
}
return *this;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
G4int G4IonisParamElm::operator==(const G4IonisParamElm& right) const
{
return (this == (G4IonisParamElm *) &right);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
G4int G4IonisParamElm::operator!=(const G4IonisParamElm& right) const
{
return (this != (G4IonisParamElm *) &right);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo....
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