lars/geant4
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Import Geant4 9.4.0 source tree

Browse Source
This commit is contained in:
Gabriele Cosmo
2016-06-09 16:25:56 +02:00
parent 74cad5e589
commit 89a9605df1
4440 changed files with 379508 additions and 189225 deletions
Download Patch File Download Diff File Expand all files Collapse all files
source/processes/electromagnetic/lowenergy/src/G4Generator2BS.cc
+30 -32
View File
@@ -23,6 +23,8 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4Generator2BS.cc,v 1.10 2010/10/14 14:01:02 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-04 $
//
// -------------------------------------------------------------------
//
@@ -38,31 +40,37 @@
// Creation date: 2 June 2003
//
// Modifications:
// 02 Jun 2003 First implementation acording with new design
// 05 Nov 2003 MGP Fixed std namespace
// 17 Nov 2003 MGP Fixed compilation problem on Windows
// 02 Jun 2003 First implementation acording with new design
// 05 Nov 2003 MGP Fixed std namespace
// 17 Nov 2003 MGP Fixed compilation problem on Windows
// 12 Oct 2010 V.Ivanchenko Moved RejectionFunction inline, use G4Pow to speadup
//
// Class Description:
//
// Concrete base class for Bremsstrahlung Angular Distribution Generation - 2BS Distribution
// Concrete base class for Bremsstrahlung Angular Distribution Generation
// 2BS Distribution
//
// Class Description: End
//
// -------------------------------------------------------------------
//
//
#include "G4Generator2BS.hh"
#include "Randomize.hh"
//
#include "Randomize.hh"
#include "G4Pow.hh"
G4Generator2BS::G4Generator2BS(const G4String& name):G4VBremAngularDistribution(name)
{;}
//
G4Generator2BS::G4Generator2BS(const G4String&)
: G4VBremAngularDistribution("AngularGen2BS")
{
g4pow = G4Pow::GetInstance();
}
//
G4Generator2BS::~G4Generator2BS()
{;}
{}
//
@@ -78,7 +86,6 @@ G4double G4Generator2BS::PolarAngle(const G4double initial_energy,
// National Research Council of Canada
// Departement of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York
G4double theta = 0;
G4double initialTotalEnergy = (initial_energy+electron_mass_c2)/electron_mass_c2;
@@ -86,8 +93,11 @@ G4double G4Generator2BS::PolarAngle(const G4double initial_energy,
EnergyRatio = finalTotalEnergy/initialTotalEnergy;
G4double gMaxEnergy = (pi*initialTotalEnergy)*(pi*initialTotalEnergy);
G4double Zeff = std::sqrt(static_cast<G4double>(Z) * (static_cast<G4double>(Z) + 1.0));
z = (0.00008116224*(std::pow(Zeff,0.3333333)));
//G4double Zeff = std::sqrt(static_cast<G4double>(Z) * (static_cast<G4double>(Z) + 1.0));
//z = (0.00008116224*(std::pow(Zeff,0.3333333)));
// VI speadup
z = 0.00008116224*(g4pow->Z13(Z) + g4pow->Z13(Z+1));
// Rejection arguments
rejection_argument1 = (1.0+EnergyRatio*EnergyRatio);
@@ -96,11 +106,10 @@ G4double G4Generator2BS::PolarAngle(const G4double initial_energy,
((1-EnergyRatio)/(2.0*initialTotalEnergy*EnergyRatio));
// Calculate rejection function at 0, 1 and Emax
G4double gfunction0 = RejectionFunction(0);
G4double gfunction1 = RejectionFunction(1);
G4double gfunction0 = RejectionFunction(0.0);
G4double gfunction1 = RejectionFunction(1.0);
G4double gfunctionEmax = RejectionFunction(gMaxEnergy);
// Calculate Maximum value
G4double gMaximum = std::max(gfunction0,gfunction1);
gMaximum = std::max(gMaximum,gfunctionEmax);
@@ -109,35 +118,24 @@ G4double G4Generator2BS::PolarAngle(const G4double initial_energy,
do{
rand = G4UniformRand();
rand = rand/(1-rand+1.0/gMaxEnergy);
rand /= (1 - rand + 1.0/gMaxEnergy);
gfunctionTest = RejectionFunction(rand);
randTest = G4UniformRand();
}while(randTest > (gfunctionTest/gMaximum));
} while(randTest*gMaximum > gfunctionTest);
theta = std::sqrt(rand)/initialTotalEnergy;
return theta;
}
//
G4double G4Generator2BS::RejectionFunction(G4double value) const
{
G4double argument = (1+value)*(1+value);
G4double gfunction = (4+std::log(rejection_argument3+(z/argument)))*
((4*EnergyRatio*value/argument)-rejection_argument1)+rejection_argument2;
return gfunction;
}
void G4Generator2BS::PrintGeneratorInformation() const
{
G4cout << "\n" << G4endl;
G4cout << "Bremsstrahlung Angular Generator is 2BS Generator from 2BS Koch & Motz distribution (Rev Mod Phys 31(4), 920 (1959))" << G4endl;
G4cout << "Bremsstrahlung Angular Generator is 2BS Generator "
<< "from 2BS Koch & Motz distribution (Rev Mod Phys 31(4), 920 (1959))" << G4endl;
G4cout << "Sampling algorithm adapted from PIRS-0203" << G4endl;
G4cout << "\n" << G4endl;
}