Import Geant4 3.1.0 source tree
This commit is contained in:
Gabriele Cosmo
@@ -6,7 +6,7 @@
|
||||
// and all its terms.
|
||||
//
|
||||
// $Id: G4EnergyLossMessenger.cc,v 1.3 2000/11/09 15:52:24 maire Exp $
|
||||
// GEANT4 tag $Name: geant4-03-00 $
|
||||
// GEANT4 tag $Name: geant4-03-01 $
|
||||
//
|
||||
//
|
||||
|
||||
|
||||
@@ -6,7 +6,7 @@
|
||||
// and all its terms.
|
||||
//
|
||||
// $Id: G4EnergyLossTables.cc,v 1.13 2000/11/04 16:47:29 maire Exp $
|
||||
// GEANT4 tag $Name: geant4-03-00 $
|
||||
// GEANT4 tag $Name: geant4-03-01 $
|
||||
//
|
||||
// -------------------------------------------------------------------
|
||||
// first version created by P.Urban , 06/04/1998
|
||||
|
||||
@@ -1,820 +0,0 @@
|
||||
// This code implementation is the intellectual property of
|
||||
// the 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: G4IMultipleScattering.cc,v 1.1 2000/03/20 14:44:04 maire Exp $
|
||||
// GEANT4 tag $Name: geant4-03-00 $
|
||||
//
|
||||
// $Id:
|
||||
// --------------------------------------------------------------
|
||||
// GEANT 4 class implementation file
|
||||
//
|
||||
// For information related to this code contact:
|
||||
// CERN, IT Division, ASD Group
|
||||
// History: based on object model of
|
||||
// 2nd December 1995, G.Cosmo
|
||||
// -------- G4IMultipleScattering physics process ------------
|
||||
// by Laszlo Urban, October 1997
|
||||
// **************************************************************
|
||||
// 09/12/98: charge can be != +- 1 !!!! L.Urban
|
||||
// ************************************************************
|
||||
// It is the first implementation of the
|
||||
// MULTIPLESCATTERING PROCESS
|
||||
// using an INTEGRAL APPROACH instead of the differential
|
||||
// one used in the standard implementation .
|
||||
// ************************************************************
|
||||
// by Laszlo Urban, 23 June 1998
|
||||
// ---------------------------------------------------------------
|
||||
// 27/10/98: cleanup , L. Urban
|
||||
|
||||
#include "G4IMultipleScattering.hh"
|
||||
#include "G4UnitsTable.hh"
|
||||
|
||||
G4IMultipleScattering::G4IMultipleScattering(const G4String& processName)
|
||||
: G4VContinuousDiscreteProcess(processName),
|
||||
theTransportMeanFreePathTable(NULL),
|
||||
theIntegralITable(NULL),
|
||||
theIntegralJTable(NULL),
|
||||
lastMaterial(NULL),
|
||||
lastKineticEnergy(-1.*MeV),
|
||||
fTransportMeanFreePath(1.e12),
|
||||
LowestKineticEnergy(0.1*keV),
|
||||
HighestKineticEnergy(100.*TeV),
|
||||
TotBin(100),
|
||||
NumberOfBuildPhysicsTableCalls(0),
|
||||
theElectron(G4Electron::Electron()),
|
||||
thePositron(G4Positron::Positron()),
|
||||
plowloss ( 0.5 ),
|
||||
plowlambda ( 0.4 ),
|
||||
tLast (0.0),
|
||||
zLast (0.0),
|
||||
CosTheta (1.0),
|
||||
biglambda ( 1.e10*mm),
|
||||
tuning(1.0)
|
||||
{ }
|
||||
|
||||
G4IMultipleScattering::~G4IMultipleScattering()
|
||||
{
|
||||
if(theTransportMeanFreePathTable)
|
||||
{
|
||||
theTransportMeanFreePathTable->clearAndDestroy() ;
|
||||
delete theTransportMeanFreePathTable ;
|
||||
}
|
||||
if(theIntegralITable)
|
||||
{
|
||||
theIntegralITable->clearAndDestroy() ;
|
||||
delete theIntegralITable ;
|
||||
}
|
||||
if(theIntegralJTable)
|
||||
{
|
||||
theIntegralJTable->clearAndDestroy() ;
|
||||
delete theIntegralJTable ;
|
||||
}
|
||||
}
|
||||
|
||||
void G4IMultipleScattering::BuildPhysicsTable(
|
||||
const G4ParticleDefinition& aParticleType)
|
||||
|
||||
{
|
||||
NumberOfBuildPhysicsTableCalls += 1 ;
|
||||
if(NumberOfBuildPhysicsTableCalls == 1)
|
||||
{ ; }
|
||||
else
|
||||
{
|
||||
const G4MaterialTable* theMaterialTable =
|
||||
G4Material::GetMaterialTable() ;
|
||||
const G4double sigmafactor = twopi*classic_electr_radius*
|
||||
classic_electr_radius ;
|
||||
G4double KineticEnergy,AtomicNumber,sigma,lambda ;
|
||||
G4double density ;
|
||||
|
||||
if(theTransportMeanFreePathTable)
|
||||
{
|
||||
theTransportMeanFreePathTable->clearAndDestroy() ;
|
||||
delete theTransportMeanFreePathTable ;
|
||||
}
|
||||
|
||||
G4int numOfMaterials = theMaterialTable->length() ;
|
||||
|
||||
theTransportMeanFreePathTable = new G4PhysicsTable(numOfMaterials) ;
|
||||
|
||||
for (G4int J=0; J<numOfMaterials; J++)
|
||||
{
|
||||
G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
|
||||
LowestKineticEnergy,HighestKineticEnergy,TotBin) ;
|
||||
|
||||
const G4Material* material = (*theMaterialTable)(J) ;
|
||||
const G4ElementVector* theElementVector =
|
||||
material->GetElementVector() ;
|
||||
const G4double* theAtomicNumDensityVector =
|
||||
material->GetAtomicNumDensityVector() ;
|
||||
const G4int NumberOfElements =
|
||||
material->GetNumberOfElements() ;
|
||||
density = material->GetDensity() ;
|
||||
|
||||
for (G4int i=0; i<TotBin; i++)
|
||||
{
|
||||
KineticEnergy = aVector->GetLowEdgeEnergy(i) ;
|
||||
|
||||
sigma = 0. ;
|
||||
|
||||
for (G4int iel=0; iel<NumberOfElements; iel++)
|
||||
{
|
||||
AtomicNumber = (*theElementVector)(iel)->GetZ() ;
|
||||
sigma += theAtomicNumDensityVector[iel]*
|
||||
ComputeTransportCrossSection(aParticleType,
|
||||
KineticEnergy,AtomicNumber) ;
|
||||
}
|
||||
|
||||
sigma *= sigmafactor ;
|
||||
|
||||
lambda = 1./sigma ;
|
||||
|
||||
aVector->PutValue(i,lambda) ;
|
||||
|
||||
}
|
||||
|
||||
theTransportMeanFreePathTable->insert(aVector) ;
|
||||
|
||||
}
|
||||
|
||||
BuildIntegralITable(aParticleType) ;
|
||||
BuildIntegralJTable(aParticleType) ;
|
||||
|
||||
NumberOfBuildPhysicsTableCalls = 0 ;
|
||||
|
||||
if( (&aParticleType == G4Electron::Electron()) ||
|
||||
(&aParticleType == G4MuonPlus::MuonPlus()) ||
|
||||
(&aParticleType == G4Proton::Proton()) )
|
||||
{
|
||||
PrintInfoDefinition() ;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
void G4IMultipleScattering::BuildIntegralITable(
|
||||
const G4ParticleDefinition& aParticleType)
|
||||
{
|
||||
const G4MaterialTable* theMaterialTable =
|
||||
G4Material::GetMaterialTable() ;
|
||||
G4Material* aMaterial ;
|
||||
G4double fmin,lmin,Value,KineticEnergy,lambda,Tlast,Vlast ;
|
||||
G4double u,umax,du,t,coeff,dEdx ;
|
||||
G4int n,nmax ;
|
||||
G4bool isOut ;
|
||||
const G4int nb = 100 ;
|
||||
G4double rmin ;
|
||||
|
||||
if(theIntegralITable)
|
||||
{
|
||||
theIntegralITable->clearAndDestroy() ;
|
||||
delete theIntegralITable ;
|
||||
}
|
||||
|
||||
G4int numOfMaterials = theMaterialTable->length() ;
|
||||
|
||||
theIntegralITable = new G4PhysicsTable(numOfMaterials) ;
|
||||
|
||||
for (G4int J=0; J<numOfMaterials; J++)
|
||||
{
|
||||
G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
|
||||
LowestKineticEnergy,HighestKineticEnergy,TotBin) ;
|
||||
|
||||
aMaterial = (*theMaterialTable)(J) ;
|
||||
|
||||
rmin = G4EnergyLossTables::GetPreciseRangeFromEnergy(
|
||||
&aParticleType,
|
||||
LowestKineticEnergy,
|
||||
aMaterial) ;
|
||||
|
||||
lmin = (*theTransportMeanFreePathTable)(J)->
|
||||
GetValue(LowestKineticEnergy,isOut) ;
|
||||
|
||||
// this value comes from z=r*l/(r+l) = exp(-I) !!!
|
||||
Value = -log(rmin*lmin/(rmin+lmin)) ;
|
||||
|
||||
aVector->PutValue(0,Value) ;
|
||||
Tlast = LowestKineticEnergy ;
|
||||
Vlast = Value ;
|
||||
for (G4int i=1; i<TotBin; i++)
|
||||
{
|
||||
KineticEnergy = aVector->GetLowEdgeEnergy(i) ;
|
||||
umax = log(KineticEnergy/Tlast) ;
|
||||
nmax = int(nb*umax + 0.5) ;
|
||||
if(nmax<1)
|
||||
nmax = 1 ;
|
||||
du = umax/nmax ;
|
||||
Value = 0. ;
|
||||
u = -du ;
|
||||
for(n=0; n<=nmax; n++)
|
||||
{
|
||||
u += du ;
|
||||
t = Tlast*exp(u) ;
|
||||
lambda = (*theTransportMeanFreePathTable)(J)->
|
||||
GetValue(t,isOut) ;
|
||||
dEdx = G4EnergyLossTables::GetPreciseDEDX(&aParticleType,
|
||||
t,aMaterial) ;
|
||||
if((n == 0) || (n == nmax))
|
||||
coeff = 0.5 ;
|
||||
else
|
||||
coeff = 1. ;
|
||||
Value += coeff*t/(dEdx*lambda) ;
|
||||
}
|
||||
Value *= du ;
|
||||
Value += Vlast ;
|
||||
aVector->PutValue(i,Value) ;
|
||||
Tlast = KineticEnergy ;
|
||||
Vlast = Value ;
|
||||
}
|
||||
theIntegralITable->insert(aVector) ;
|
||||
}
|
||||
}
|
||||
|
||||
void G4IMultipleScattering::BuildIntegralJTable(
|
||||
const G4ParticleDefinition& aParticleType)
|
||||
{
|
||||
const G4MaterialTable* theMaterialTable =
|
||||
G4Material::GetMaterialTable() ;
|
||||
G4Material* aMaterial ;
|
||||
G4double rmin,lmin,Value,KineticEnergy,lambda,Tlast,Vlast ;
|
||||
G4double u,umax,du,t,coeff,dEdx,w,ww ;
|
||||
G4double cmin,lndu ;
|
||||
G4int n,nmax ;
|
||||
G4bool isOut ;
|
||||
const G4int nb = 100 ;
|
||||
|
||||
if(theIntegralJTable)
|
||||
{
|
||||
theIntegralJTable->clearAndDestroy() ;
|
||||
delete theIntegralJTable ;
|
||||
}
|
||||
|
||||
G4int numOfMaterials = theMaterialTable->length() ;
|
||||
theIntegralJTable = new G4PhysicsTable(numOfMaterials) ;
|
||||
|
||||
for (G4int J=0; J<numOfMaterials; J++)
|
||||
{
|
||||
G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
|
||||
LowestKineticEnergy,HighestKineticEnergy,TotBin) ;
|
||||
aMaterial = (*theMaterialTable)(J) ;
|
||||
|
||||
rmin = G4EnergyLossTables::GetPreciseRangeFromEnergy(
|
||||
&aParticleType,
|
||||
LowestKineticEnergy,
|
||||
aMaterial) ;
|
||||
lmin = (*theTransportMeanFreePathTable)(J)->
|
||||
GetValue(LowestKineticEnergy,isOut) ;
|
||||
Value = rmin*lmin/(rmin+lmin) ;
|
||||
aVector->PutValue(0,Value) ;
|
||||
Tlast = LowestKineticEnergy ;
|
||||
Vlast = Value ;
|
||||
for (G4int i=1; i<TotBin; i++)
|
||||
{
|
||||
KineticEnergy = aVector->GetLowEdgeEnergy(i) ;
|
||||
umax = log(KineticEnergy/Tlast) ;
|
||||
nmax =int(nb*umax + 0.5) ;
|
||||
if(nmax<1)
|
||||
nmax = 1 ;
|
||||
du = umax/nmax ;
|
||||
Value = 0. ;
|
||||
u = -du ;
|
||||
for(n=0; n<=nmax; n++)
|
||||
{
|
||||
u += du ;
|
||||
t = Tlast*exp(u) ;
|
||||
w = (*theIntegralITable)(J)->
|
||||
GetValue(t,isOut) ;
|
||||
dEdx = G4EnergyLossTables::GetPreciseDEDX(&aParticleType,
|
||||
t,aMaterial) ;
|
||||
if((n == 0) || (n == nmax))
|
||||
coeff = 0.5 ;
|
||||
else
|
||||
coeff = 1. ;
|
||||
Value += coeff*t*exp(w)/dEdx ;
|
||||
}
|
||||
Value *= du ;
|
||||
w = (*theIntegralITable)(J)->
|
||||
GetValue(Tlast,isOut) ;
|
||||
ww = (*theIntegralITable)(J)->
|
||||
GetValue(KineticEnergy,isOut) ;
|
||||
Value *= exp(-ww) ;
|
||||
Value += exp(w-ww)*Vlast ;
|
||||
aVector->PutValue(i,Value) ;
|
||||
Tlast = KineticEnergy ;
|
||||
Vlast = Value ;
|
||||
}
|
||||
theIntegralJTable->insert(aVector) ;
|
||||
}
|
||||
}
|
||||
|
||||
G4double G4IMultipleScattering::GetIntegralI(
|
||||
const G4ParticleDefinition *aParticle,
|
||||
G4double KineticEnergy,
|
||||
G4Material* aMaterial)
|
||||
{
|
||||
G4double intI ;
|
||||
G4bool isOut ;
|
||||
if(KineticEnergy < LowestKineticEnergy)
|
||||
{
|
||||
intI = (*theIntegralITable)(aMaterial->GetIndex())->
|
||||
GetValue(LowestKineticEnergy,isOut) ;
|
||||
intI *= exp((1.-plowloss-plowlambda)*
|
||||
log(KineticEnergy/LowestKineticEnergy)) ;
|
||||
}
|
||||
else if(KineticEnergy <= HighestKineticEnergy)
|
||||
{
|
||||
intI = (*theIntegralITable)(aMaterial->GetIndex())->
|
||||
GetValue(KineticEnergy,isOut) ;
|
||||
}
|
||||
else
|
||||
{
|
||||
intI = (*theIntegralITable)(aMaterial->GetIndex())->
|
||||
GetValue(HighestKineticEnergy,isOut) ;
|
||||
intI += (KineticEnergy-HighestKineticEnergy)/
|
||||
((*theTransportMeanFreePathTable)(aMaterial->GetIndex())->
|
||||
GetValue(HighestKineticEnergy,isOut)
|
||||
*
|
||||
G4EnergyLossTables::GetPreciseDEDX(aParticle,
|
||||
HighestKineticEnergy,aMaterial)) ;
|
||||
}
|
||||
return intI ;
|
||||
}
|
||||
|
||||
G4double G4IMultipleScattering::GetIntegralJ(
|
||||
const G4ParticleDefinition *aParticle,
|
||||
G4double KineticEnergy,
|
||||
G4Material* aMaterial)
|
||||
{
|
||||
G4double intJ,lmin,lmax,fmax,Imin,Imin2,t ;
|
||||
G4bool isOut ;
|
||||
|
||||
if(KineticEnergy < LowestKineticEnergy)
|
||||
{
|
||||
lmin = (*theTransportMeanFreePathTable)(aMaterial->GetIndex())->
|
||||
GetValue(KineticEnergy,isOut) ;
|
||||
Imin = (*theIntegralITable)(aMaterial->GetIndex())->
|
||||
GetValue(LowestKineticEnergy,isOut) ;
|
||||
Imin2= Imin*Imin ;
|
||||
t = exp(0.1*log(KineticEnergy/LowestKineticEnergy)) ;
|
||||
|
||||
intJ = (((t-4./Imin)*t+12./Imin2)*t-24./(Imin*Imin2))*t+24./(Imin2*Imin2);
|
||||
intJ -= 24.*exp(-Imin*t)/(Imin2*Imin2) ;
|
||||
intJ *= lmin ;
|
||||
}
|
||||
else if(KineticEnergy <= HighestKineticEnergy)
|
||||
{
|
||||
intJ = (*theIntegralJTable)(aMaterial->GetIndex())->
|
||||
GetValue(KineticEnergy,isOut) ;
|
||||
}
|
||||
else
|
||||
{
|
||||
lmax = (*theTransportMeanFreePathTable)(aMaterial->GetIndex())->
|
||||
GetValue(HighestKineticEnergy,isOut) ;
|
||||
fmax = G4EnergyLossTables::GetPreciseDEDX(aParticle,
|
||||
HighestKineticEnergy,aMaterial) ;
|
||||
intJ = lmax - (lmax-(*theIntegralJTable)(aMaterial->GetIndex())->
|
||||
GetValue(HighestKineticEnergy,isOut))*
|
||||
exp((HighestKineticEnergy-KineticEnergy)/(fmax*lmax)) ;
|
||||
}
|
||||
|
||||
return intJ ;
|
||||
}
|
||||
|
||||
G4double G4IMultipleScattering::ComputeTransportCrossSection(
|
||||
const G4ParticleDefinition& aParticleType,
|
||||
G4double KineticEnergy,
|
||||
G4double AtomicNumber)
|
||||
{
|
||||
const G4double epsfactor = 2.*electron_mass_c2*electron_mass_c2*
|
||||
Bohr_radius*Bohr_radius/(hbarc*hbarc) ;
|
||||
const G4double epsmin = 1.e-4 , epsmax = 1.e10 ;
|
||||
|
||||
const G4double cpar=1.50 ;
|
||||
|
||||
const G4double Zdat[15] = {4.,6.,13.,20.,26.,29.,32.,38.,47.,
|
||||
50.,56.,64.,74.,79.,82. } ;
|
||||
|
||||
const G4double Tdat[22] =
|
||||
{ 0.0001*MeV,0.0002*MeV,0.0004*MeV,0.0007*MeV,
|
||||
0.001*MeV,0.002*MeV,0.004*MeV,0.007*MeV,0.01*MeV,
|
||||
0.02*MeV,0.04*MeV,0.07*MeV,0.1*MeV,0.2*MeV,
|
||||
0.4*MeV,0.7*MeV,1.*MeV,2.*MeV,4.*MeV,
|
||||
7.*MeV,10.*MeV,20.*MeV} ;
|
||||
|
||||
// corr. factors for e-/e+ lambda
|
||||
|
||||
const G4double celectron[15][22] =
|
||||
{{1.125,1.072,1.051,1.047,1.047,1.050,1.052,1.054,
|
||||
1.054,1.057,1.062,1.069,1.075,1.090,1.105,1.111,
|
||||
1.112,1.108,1.100,1.093,1.089,1.087 },
|
||||
{1.408,1.246,1.143,1.096,1.077,1.059,1.053,1.051,
|
||||
1.052,1.053,1.058,1.065,1.072,1.087,1.101,1.108,
|
||||
1.109,1.105,1.097,1.090,1.086,1.082 },
|
||||
{2.833,2.268,1.861,1.612,1.486,1.309,1.204,1.156,
|
||||
1.136,1.114,1.106,1.106,1.109,1.119,1.129,1.132,
|
||||
1.131,1.124,1.113,1.104,1.099,1.098 },
|
||||
{3.879,3.016,2.380,2.007,1.818,1.535,1.340,1.236,
|
||||
1.190,1.133,1.107,1.099,1.098,1.103,1.110,1.113,
|
||||
1.112,1.105,1.096,1.089,1.085,1.098 },
|
||||
{6.937,4.330,2.886,2.256,1.987,1.628,1.395,1.265,
|
||||
1.203,1.122,1.080,1.065,1.061,1.063,1.070,1.073,
|
||||
1.073,1.070,1.064,1.059,1.056,1.056 },
|
||||
{9.616,5.708,3.424,2.551,2.204,1.762,1.485,1.330,
|
||||
1.256,1.155,1.099,1.077,1.070,1.068,1.072,1.074,
|
||||
1.074,1.070,1.063,1.059,1.056,1.052 },
|
||||
{11.72,6.364,3.811,2.806,2.401,1.884,1.564,1.386,
|
||||
1.300,1.180,1.112,1.082,1.073,1.066,1.068,1.069,
|
||||
1.068,1.064,1.059,1.054,1.051,1.050 },
|
||||
{18.08,8.601,4.569,3.183,2.662,2.025,1.646,1.439,
|
||||
1.339,1.195,1.108,1.068,1.053,1.040,1.039,1.039,
|
||||
1.039,1.037,1.034,1.031,1.030,1.036 },
|
||||
{18.22,10.48,5.333,3.713,3.115,2.367,1.898,1.631,
|
||||
1.498,1.301,1.171,1.105,1.077,1.048,1.036,1.033,
|
||||
1.031,1.028,1.024,1.022,1.021,1.024 },
|
||||
{14.14,10.65,5.710,3.929,3.266,2.453,1.951,1.669,
|
||||
1.528,1.319,1.178,1.106,1.075,1.040,1.027,1.022,
|
||||
1.020,1.017,1.015,1.013,1.013,1.020 },
|
||||
{14.11,11.73,6.312,4.240,3.478,2.566,2.022,1.720,
|
||||
1.569,1.342,1.186,1.102,1.065,1.022,1.003,0.997,
|
||||
0.995,0.993,0.993,0.993,0.993,1.011 },
|
||||
{22.76,20.01,8.835,5.287,4.144,2.901,2.219,1.855,
|
||||
1.677,1.410,1.224,1.121,1.073,1.014,0.986,0.976,
|
||||
0.974,0.972,0.973,0.974,0.975,0.987 },
|
||||
{50.77,40.85,14.13,7.184,5.284,3.435,2.520,2.059,
|
||||
1.837,1.512,1.283,1.153,1.091,1.010,0.969,0.954,
|
||||
0.950,0.947,0.949,0.952,0.954,0.963 },
|
||||
{65.87,59.06,15.87,7.570,5.567,3.650,2.682,2.182,
|
||||
1.939,1.579,1.325,1.178,1.108,1.014,0.965,0.947,
|
||||
0.941,0.938,0.940,0.944,0.946,0.954 },
|
||||
// {45.60,47.34,15.92,7.810,5.755,3.767,2.760,2.239, misprint?
|
||||
{55.60,47.34,15.92,7.810,5.755,3.767,2.760,2.239,
|
||||
1.985,1.609,1.343,1.188,1.113,1.013,0.960,0.939,
|
||||
0.933,0.930,0.933,0.936,0.939,0.949 }};
|
||||
|
||||
const G4double cpositron[15][22] = {
|
||||
{2.589,2.044,1.658,1.446,1.347,1.217,1.144,1.110,
|
||||
1.097,1.083,1.080,1.086,1.092,1.108,1.123,1.131,
|
||||
1.131,1.126,1.117,1.108,1.103,1.100 },
|
||||
{3.904,2.794,2.079,1.710,1.543,1.325,1.202,1.145,
|
||||
1.122,1.096,1.089,1.092,1.098,1.114,1.130,1.137,
|
||||
1.138,1.132,1.122,1.113,1.108,1.102 },
|
||||
{7.970,6.080,4.442,3.398,2.872,2.127,1.672,1.451,
|
||||
1.357,1.246,1.194,1.179,1.178,1.188,1.201,1.205,
|
||||
1.203,1.190,1.173,1.159,1.151,1.145 },
|
||||
{9.714,7.607,5.747,4.493,3.815,2.777,2.079,1.715,
|
||||
1.553,1.353,1.253,1.219,1.211,1.214,1.225,1.228,
|
||||
1.225,1.210,1.191,1.175,1.166,1.174 },
|
||||
{17.97,12.95,8.628,6.065,4.849,3.222,2.275,1.820,
|
||||
1.624,1.382,1.259,1.214,1.202,1.202,1.214,1.219,
|
||||
1.217,1.203,1.184,1.169,1.160,1.151 },
|
||||
{24.83,17.06,10.84,7.355,5.767,3.707,2.546,1.996,
|
||||
1.759,1.465,1.311,1.252,1.234,1.228,1.238,1.241,
|
||||
1.237,1.222,1.201,1.184,1.174,1.159 },
|
||||
{23.26,17.15,11.52,8.049,6.375,4.114,2.792,2.155,
|
||||
1.880,1.535,1.353,1.281,1.258,1.247,1.254,1.256,
|
||||
1.252,1.234,1.212,1.194,1.183,1.170 },
|
||||
{22.33,18.01,12.86,9.212,7.336,4.702,3.117,2.348,
|
||||
2.015,1.602,1.385,1.297,1.268,1.251,1.256,1.258,
|
||||
1.254,1.237,1.214,1.195,1.185,1.179 },
|
||||
{33.91,24.13,15.71,10.80,8.507,5.467,3.692,2.808,
|
||||
2.407,1.873,1.564,1.425,1.374,1.330,1.324,1.320,
|
||||
1.312,1.288,1.258,1.235,1.221,1.205 },
|
||||
{32.14,24.11,16.30,11.40,9.015,5.782,3.868,2.917,
|
||||
2.490,1.925,1.596,1.447,1.391,1.342,1.332,1.327,
|
||||
1.320,1.294,1.264,1.240,1.226,1.214 },
|
||||
{29.51,24.07,17.19,12.28,9.766,6.238,4.112,3.066,
|
||||
2.602,1.995,1.641,1.477,1.414,1.356,1.342,1.336,
|
||||
1.328,1.302,1.270,1.245,1.231,1.233 },
|
||||
{38.19,30.85,21.76,15.35,12.07,7.521,4.812,3.498,
|
||||
2.926,2.188,1.763,1.563,1.484,1.405,1.382,1.371,
|
||||
1.361,1.330,1.294,1.267,1.251,1.239 },
|
||||
{49.71,39.80,27.96,19.63,15.36,9.407,5.863,4.155,
|
||||
3.417,2.478,1.944,1.692,1.589,1.480,1.441,1.423,
|
||||
1.409,1.372,1.330,1.298,1.280,1.258 },
|
||||
{59.25,45.08,30.36,20.83,16.15,9.834,6.166,4.407,
|
||||
3.641,2.648,2.064,1.779,1.661,1.531,1.482,1.459,
|
||||
1.442,1.400,1.354,1.319,1.299,1.272 },
|
||||
{56.38,44.29,30.50,21.18,16.51,10.11,6.354,4.542,
|
||||
3.752,2.724,2.116,1.817,1.692,1.554,1.499,1.474,
|
||||
1.456,1.412,1.364,1.328,1.307,1.282 }};
|
||||
G4double Z23,ParticleMass,rat2,Charge,TotalEnergy,beta2,bg2,
|
||||
eps,Z1,Z2,ratZ,T,E,b2small,b2big,ratb2,c1,c2,cc1,cc2,
|
||||
corr,sigma,corrfactor,ChargeSquare ;
|
||||
G4int iZ,iT ;
|
||||
|
||||
Z23 = 2.*log(AtomicNumber)/3. ;
|
||||
Z23 = exp(Z23) ;
|
||||
|
||||
ParticleMass = aParticleType.GetPDGMass() ;
|
||||
|
||||
rat2 = ParticleMass/electron_mass_c2 ;
|
||||
rat2 = rat2*rat2 ;
|
||||
|
||||
Charge = aParticleType.GetPDGCharge() ;
|
||||
ChargeSquare = Charge*Charge/(eplus*eplus) ;
|
||||
|
||||
TotalEnergy = KineticEnergy + ParticleMass ;
|
||||
|
||||
beta2 = KineticEnergy*(TotalEnergy+ParticleMass)/
|
||||
(TotalEnergy*TotalEnergy) ;
|
||||
bg2 = KineticEnergy*(TotalEnergy+ParticleMass)/
|
||||
(ParticleMass*ParticleMass) ;
|
||||
|
||||
eps = rat2*epsfactor*bg2/Z23 ;
|
||||
|
||||
if(eps<epsmin)
|
||||
sigma = 2.*eps*eps*eps/3. ;
|
||||
else if(eps<epsmax)
|
||||
sigma = log(1.+2.*eps)-2.*eps/(1.+eps) ;
|
||||
else
|
||||
sigma = log(2.*eps)-2.+2.5/eps ;
|
||||
|
||||
sigma *= ChargeSquare*AtomicNumber*AtomicNumber/rat2 ;
|
||||
sigma /= beta2*bg2 ;
|
||||
|
||||
// correct this value using the corrections computed for e+/e-
|
||||
KineticEnergy *= electron_mass_c2/ParticleMass ;
|
||||
|
||||
// interpolate in AtomicNumber and beta2
|
||||
|
||||
// get bin number in Z
|
||||
iZ = 14 ;
|
||||
|
||||
while ((iZ>=0)&&(Zdat[iZ]>=AtomicNumber))
|
||||
{
|
||||
iZ -= 1 ;
|
||||
}
|
||||
if(iZ==14)
|
||||
{
|
||||
iZ = 13 ;
|
||||
}
|
||||
if(iZ==-1)
|
||||
{
|
||||
iZ = 0 ;
|
||||
}
|
||||
|
||||
Z1 = Zdat[iZ] ;
|
||||
Z2 = Zdat[iZ+1] ;
|
||||
ratZ = (AtomicNumber-Z1)/(Z2-Z1) ;
|
||||
|
||||
// get bin number in T (beta2)
|
||||
iT = 21 ;
|
||||
while ((iT>=0)&&(Tdat[iT]>=KineticEnergy))
|
||||
iT -= 1 ;
|
||||
if(iT==21)
|
||||
iT = 20 ;
|
||||
if(iT==-1)
|
||||
iT = 0 ;
|
||||
|
||||
// calculate betasquare values
|
||||
T = Tdat[iT] ;
|
||||
E = T + electron_mass_c2 ;
|
||||
b2small = T*(E+electron_mass_c2)/(E*E) ;
|
||||
T = Tdat[iT+1] ;
|
||||
E = T + electron_mass_c2 ;
|
||||
b2big = T*(E+electron_mass_c2)/(E*E) ;
|
||||
ratb2 = (beta2-b2small)/(b2big-b2small) ;
|
||||
|
||||
corrfactor = tuning*(1.+cpar)/(1.+cpar*beta2) ;
|
||||
|
||||
if(Charge < 0.)
|
||||
{
|
||||
c1 = celectron[iZ][iT] ;
|
||||
c2 = celectron[iZ+1][iT] ;
|
||||
cc1 = c1+ratZ*(c2-c1) ;
|
||||
|
||||
c1 = celectron[iZ][iT+1] ;
|
||||
c2 = celectron[iZ+1][iT+1] ;
|
||||
cc2 = c1+ratZ*(c2-c1) ;
|
||||
|
||||
corr = cc1+ratb2*(cc2-cc1) ;
|
||||
|
||||
sigma /= corr ;
|
||||
|
||||
}
|
||||
|
||||
if(Charge > 0.)
|
||||
{
|
||||
c1 = cpositron[iZ][iT] ;
|
||||
c2 = cpositron[iZ+1][iT] ;
|
||||
cc1 = c1+ratZ*(c2-c1) ;
|
||||
|
||||
c1 = cpositron[iZ][iT+1] ;
|
||||
c2 = cpositron[iZ+1][iT+1] ;
|
||||
cc2 = c1+ratZ*(c2-c1) ;
|
||||
|
||||
corr = cc1+ratb2*(cc2-cc1) ;
|
||||
|
||||
sigma /= corr ;
|
||||
}
|
||||
|
||||
sigma *= corrfactor ;
|
||||
|
||||
return sigma ;
|
||||
}
|
||||
|
||||
|
||||
|
||||
G4VParticleChange* G4IMultipleScattering::PostStepDoIt(
|
||||
const G4Track& trackData,
|
||||
const G4Step& stepData)
|
||||
{
|
||||
G4double lambdasave ;
|
||||
const G4double taulim = 1.e-10 , randlim = 0.25*taulim*taulim ;
|
||||
const G4double tausmall = 5.e-5,taubig =50.;
|
||||
|
||||
const G4double scatteringparameter=1.00 ,
|
||||
kappa = 2.5, kappapl1 = kappa+1., kappami1 = kappa-1. ;
|
||||
|
||||
const G4DynamicParticle* aParticle ;
|
||||
G4Material* aMaterial ;
|
||||
G4int materialIndex ;
|
||||
G4double KineticEnergy,truestep,tau,prob,cth,sth,phi,
|
||||
dirx,diry,dirz,w,w1,etau,rmean,safetyminustolerance,
|
||||
xnew,ynew,znew ;
|
||||
G4double rand,rmax2 ;
|
||||
G4bool isOut;
|
||||
|
||||
aParticleChange.Initialize(trackData) ;
|
||||
|
||||
aMaterial = stepData.GetPreStepPoint()->GetMaterial() ;
|
||||
|
||||
|
||||
truestep = stepData.GetStepLength() ;
|
||||
|
||||
// there is no scattering for truestep=0. !
|
||||
if(truestep == 0.)
|
||||
return &aParticleChange ;
|
||||
|
||||
aParticle = trackData.GetDynamicParticle() ;
|
||||
|
||||
materialIndex = aMaterial->GetIndex() ;
|
||||
KineticEnergy = aParticle->GetKineticEnergy() ;
|
||||
|
||||
// shortcut if the particle is not Alive (e.g. stopped in energy loss)
|
||||
if(trackData.GetTrackStatus() != fAlive)
|
||||
return &aParticleChange ;
|
||||
|
||||
if ((lastMaterial == aMaterial) && (lastKineticEnergy == KineticEnergy))
|
||||
{
|
||||
;
|
||||
}
|
||||
else
|
||||
{
|
||||
lastMaterial=aMaterial;
|
||||
lastKineticEnergy=KineticEnergy;
|
||||
if(KineticEnergy<LowestKineticEnergy)
|
||||
{
|
||||
fTransportMeanFreePath =
|
||||
exp(plowlambda*log(KineticEnergy/LowestKineticEnergy))*
|
||||
(*theTransportMeanFreePathTable)
|
||||
(materialIndex)->GetValue(LowestKineticEnergy,isOut);
|
||||
}
|
||||
else
|
||||
{
|
||||
// TransportMeanFreePath taken at kin.energy after the energy loss!
|
||||
if(KineticEnergy>HighestKineticEnergy)
|
||||
KineticEnergy = HighestKineticEnergy ;
|
||||
fTransportMeanFreePath = (*theTransportMeanFreePathTable)
|
||||
(materialIndex)->GetValue(KineticEnergy,isOut);
|
||||
}
|
||||
}
|
||||
|
||||
// effective lambda used in scattering .....................
|
||||
lambdasave = fTransportMeanFreePath ;
|
||||
|
||||
if(CosTheta == 1.)
|
||||
{
|
||||
fTransportMeanFreePath = biglambda ;
|
||||
tau = 0.;
|
||||
cth = 1. ;
|
||||
}
|
||||
else if(CosTheta == 0.)
|
||||
{
|
||||
fTransportMeanFreePath = 0. ;
|
||||
tau = biglambda ;
|
||||
cth = -1.+2.*G4UniformRand() ;
|
||||
}
|
||||
else
|
||||
{
|
||||
fTransportMeanFreePath = -truestep/log(CosTheta) ;
|
||||
tau = truestep/fTransportMeanFreePath ;
|
||||
prob = exp(-tau)*(1.+scatteringparameter*tau) ;
|
||||
|
||||
if(G4UniformRand()<prob)
|
||||
{
|
||||
if(tau<taulim)
|
||||
{
|
||||
rand = G4UniformRand() ;
|
||||
if(rand > randlim)
|
||||
cth = 1.-tau*(1./sqrt(rand)-1.) ;
|
||||
else
|
||||
cth = -1. ;
|
||||
}
|
||||
else
|
||||
{
|
||||
w = 1.+scatteringparameter*tau ;
|
||||
w1 = w-1. ;
|
||||
cth = w-w1*(w+1.)/sqrt(w1*w1+4.*w*G4UniformRand()) ;
|
||||
}
|
||||
}
|
||||
else
|
||||
cth = -1.+2.*G4UniformRand() ;
|
||||
}
|
||||
|
||||
sth = sqrt(1.-cth*cth) ;
|
||||
phi = twopi*G4UniformRand() ;
|
||||
|
||||
dirx = sth*cos(phi) ;
|
||||
diry = sth*sin(phi) ;
|
||||
dirz = cth ;
|
||||
|
||||
G4ParticleMomentum ParticleDirection = aParticle->GetMomentumDirection();
|
||||
G4ThreeVector newDirection(dirx,diry,dirz) ;
|
||||
newDirection.rotateUz(ParticleDirection) ;
|
||||
aParticleChange.SetNumberOfSecondaries(0) ;
|
||||
aParticleChange.SetEnergyChange( KineticEnergy ) ;
|
||||
aParticleChange.SetMomentumChange(newDirection.x(),
|
||||
newDirection.y(),
|
||||
newDirection.z()) ;
|
||||
|
||||
// compute lateral displacement
|
||||
// only for safety > tolerance !!!!!
|
||||
safetyminustolerance = stepData.GetPostStepPoint()->GetSafety()
|
||||
-kCarTolerance ;
|
||||
if(safetyminustolerance > 0.)
|
||||
{
|
||||
if(truestep == GeomStepFinal)
|
||||
{ ; }
|
||||
else
|
||||
{
|
||||
rmax2 = (truestep+GeomStepFinal)*(truestep-GeomStepFinal) ;
|
||||
if(tau<tausmall)
|
||||
rmean = 5.*tau*tau*tau/12. ;
|
||||
else
|
||||
{
|
||||
if(tau<taubig)
|
||||
etau = exp(-tau) ;
|
||||
else
|
||||
etau = 0. ;
|
||||
rmean = -kappa*tau ;
|
||||
rmean = -exp(rmean)/(kappa*kappami1) ;
|
||||
rmean += tau-kappapl1/kappa+kappa*etau/kappami1 ;
|
||||
}
|
||||
rmean *= 4.*fTransportMeanFreePath*fTransportMeanFreePath/3.;
|
||||
if(rmean>rmax2)
|
||||
rmean = rmax2 ;
|
||||
|
||||
if(rmean>0.)
|
||||
{
|
||||
rmean = sqrt(rmean) ;
|
||||
|
||||
if(rmean>safetyminustolerance)
|
||||
rmean = safetyminustolerance ;
|
||||
|
||||
fMeanLateralDisplacement = rmean ;
|
||||
|
||||
// sample direction of lateral displacement
|
||||
phi = twopi*G4UniformRand() ;
|
||||
dirx = cos(phi) ;
|
||||
diry = sin(phi) ;
|
||||
dirz = 0. ;
|
||||
G4ThreeVector latDirection(dirx,diry,dirz);
|
||||
latDirection.rotateUz(ParticleDirection) ;
|
||||
|
||||
// compute new endpoint of the Step
|
||||
xnew = stepData.GetPostStepPoint()->GetPosition().x()+
|
||||
rmean*latDirection.x() ;
|
||||
ynew = stepData.GetPostStepPoint()->GetPosition().y()+
|
||||
rmean*latDirection.y() ;
|
||||
znew = stepData.GetPostStepPoint()->GetPosition().z()+
|
||||
rmean*latDirection.z() ;
|
||||
|
||||
aParticleChange.SetPositionChange(xnew,ynew,znew) ;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fTransportMeanFreePath = lambdasave ;
|
||||
|
||||
return &aParticleChange ;
|
||||
|
||||
}
|
||||
|
||||
void G4IMultipleScattering::PrintInfoDefinition()
|
||||
{
|
||||
G4String comments = " Tables of transport mean free paths.";
|
||||
comments += "\n New model of MSC , computes the lateral \n";
|
||||
comments += " displacement of the particle , too.";
|
||||
|
||||
G4cout << G4endl << GetProcessName() << ": " << comments
|
||||
<< "\n PhysicsTables from " << G4BestUnit(LowestKineticEnergy,
|
||||
"Energy")
|
||||
<< " to " << G4BestUnit(HighestKineticEnergy,"Energy")
|
||||
<< " in " << TotBin << " bins. \n";
|
||||
}
|
||||
|
||||
@@ -5,8 +5,8 @@
|
||||
// based on the Program) you indicate your acceptance of this statement,
|
||||
// and all its terms.
|
||||
//
|
||||
// $Id: G4MultipleScattering.cc,v 1.5 2000/08/10 13:15:13 urban Exp $
|
||||
// GEANT4 tag $Name: geant4-03-00 $
|
||||
// $Id: G4MultipleScattering.cc,v 1.6 2001/01/11 10:44:34 urban Exp $
|
||||
// GEANT4 tag $Name: geant4-03-01 $
|
||||
//
|
||||
// $Id:
|
||||
// --------------------------------------------------------------
|
||||
@@ -27,6 +27,7 @@
|
||||
// 22/03/00: value of member cpar has changed! , L.Urban
|
||||
// 20/06/00: nuclear size correction for particles other than e+/e- only , L.Urban
|
||||
// 10/08/00 values of some data members has been changed, L.Urban
|
||||
// 09/11/00 bug corrected in sigma computation, L.Urban
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#include "G4MultipleScattering.hh"
|
||||
@@ -292,11 +293,11 @@
|
||||
eps = rat2*epsfactor*bg2/Z23 ;
|
||||
|
||||
if(eps<epsmin)
|
||||
sigma = 2.*eps*eps*eps/3. ;
|
||||
sigma = 2.*eps*eps ;
|
||||
else if(eps<epsmax)
|
||||
sigma = log(1.+2.*eps)-2.*eps/(1.+eps) ;
|
||||
sigma = log(1.+2.*eps)-2.*eps/(1.+2.*eps) ;
|
||||
else
|
||||
sigma = log(2.*eps)-2.+2.5/eps ;
|
||||
sigma = log(2.*eps)-1.+1./eps ;
|
||||
|
||||
sigma *=ChargeSquare*AtomicNumber*AtomicNumber/rat2 ;
|
||||
sigma /= beta2*bg2 ;
|
||||
@@ -483,7 +484,7 @@
|
||||
}
|
||||
else
|
||||
cth = -1.+2.*G4UniformRand() ;
|
||||
|
||||
|
||||
sth = sqrt(1.-cth*cth) ;
|
||||
|
||||
phi = twopi*G4UniformRand() ;
|
||||
@@ -561,6 +562,7 @@
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
return &fParticleChange ;
|
||||
|
||||
}
|
||||
|
||||
@@ -5,12 +5,17 @@
|
||||
// based on the Program) you indicate your acceptance of this statement,
|
||||
// and all its terms.
|
||||
//
|
||||
// $Id: G4VEnergyLoss.cc,v 1.15 2000/10/30 06:50:49 urban Exp $
|
||||
// GEANT4 tag $Name: geant4-03-00 $
|
||||
// $Id: G4VEnergyLoss.cc,v 1.20 2001/03/27 12:16:35 urban Exp $
|
||||
// GEANT4 tag $Name: geant4-03-01 $
|
||||
//
|
||||
|
||||
// --------------------------------------------------------------
|
||||
//
|
||||
// bug fixed in fluct., L.Urban 01/02/01
|
||||
// bug fixed in fluct., L.Urban 26/05/00
|
||||
// bug fixed in fluct., L.Urban 22/11/00
|
||||
// bugfix in fluct.
|
||||
// (some variables are doubles instead of ints now),L.Urban 23/03/01
|
||||
//
|
||||
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
||||
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
||||
@@ -903,7 +908,7 @@ G4double G4VEnergyLoss::GetLossWithFluct(const G4DynamicParticle* aParticle,
|
||||
G4double threshold,w1,w2,C,
|
||||
beta2,suma,e0,loss,lossc ,w,electronDensity;
|
||||
G4double a1,a2,a3;
|
||||
G4int p1,p2,p3;
|
||||
G4double p1,p2,p3 ;
|
||||
G4int nb;
|
||||
G4double Corrfac, na,alfa,rfac,namean,sa,alfa1,ea,sea;
|
||||
G4double dp1,dp3;
|
||||
@@ -921,22 +926,22 @@ G4double G4VEnergyLoss::GetLossWithFluct(const G4DynamicParticle* aParticle,
|
||||
G4double tau = Tkin/ParticleMass, tau1 = tau+1., tau2 = tau*(tau+2.);
|
||||
G4double Tm = 2.*electron_mass_c2*tau2/(1.+2.*tau1*rmass+rmass*rmass);
|
||||
|
||||
if (Tm <= ipotFluct) Tm = ipotFluct ;
|
||||
|
||||
if(Tm > threshold) Tm = threshold;
|
||||
beta2 = tau2/(tau1*tau1);
|
||||
|
||||
// Gaussian fluctuation ?
|
||||
if(MeanLoss >= kappa*Tm)
|
||||
{
|
||||
electronDensity = aMaterial->GetElectronDensity() ;
|
||||
siga = sqrt(Tm*(0.5-0.25*beta2)*step*
|
||||
siga = sqrt(Tm*(1.0-0.5*beta2)*step*
|
||||
factor*electronDensity*ChargeSquare/beta2) ;
|
||||
loss = G4RandGauss::shoot(MeanLoss,siga) ;
|
||||
if(loss < 0.) loss = 0. ;
|
||||
return loss ;
|
||||
}
|
||||
|
||||
if (Tm <= ipotFluct) Tm = ipotFluct ;
|
||||
if(Tm > threshold) Tm = threshold;
|
||||
|
||||
w1 = Tm/ipotFluct;
|
||||
w2 = log(2.*electron_mass_c2*tau2);
|
||||
|
||||
@@ -968,10 +973,10 @@ G4double G4VEnergyLoss::GetLossWithFluct(const G4DynamicParticle* aParticle,
|
||||
if(a3>alim)
|
||||
{
|
||||
siga=sqrt(a3) ;
|
||||
p3 = G4std::max(0,int(G4RandGauss::shoot(a3,siga)+0.5));
|
||||
p3 = G4std::max(0.,G4RandGauss::shoot(a3,siga)+0.5);
|
||||
}
|
||||
else
|
||||
p3 = G4Poisson(a3);
|
||||
p3 = G4float(G4Poisson(a3));
|
||||
|
||||
loss = p3*e0 ;
|
||||
|
||||
@@ -987,24 +992,24 @@ G4double G4VEnergyLoss::GetLossWithFluct(const G4DynamicParticle* aParticle,
|
||||
if(a3>alim)
|
||||
{
|
||||
siga=sqrt(a3) ;
|
||||
p3 = G4std::max(0,int(G4RandGauss::shoot(a3,siga)+0.5));
|
||||
p3 = G4std::max(0.,G4RandGauss::shoot(a3,siga)+0.5);
|
||||
}
|
||||
else
|
||||
p3 = G4Poisson(a3);
|
||||
p3 = G4float(G4Poisson(a3));
|
||||
|
||||
if(p3 > 0)
|
||||
{
|
||||
w = (Tm-e0)/Tm ;
|
||||
if(p3 > nmaxCont2)
|
||||
if(p3 > G4float(nmaxCont2))
|
||||
{
|
||||
dp3 = G4float(p3) ;
|
||||
dp3 = p3 ;
|
||||
Corrfac = dp3/G4float(nmaxCont2) ;
|
||||
p3 = nmaxCont2 ;
|
||||
p3 = G4float(nmaxCont2) ;
|
||||
}
|
||||
else
|
||||
Corrfac = 1. ;
|
||||
|
||||
for(G4int i=0; i<p3; i++) loss += 1./(1.-w*G4UniformRand()) ;
|
||||
for(G4int i=0; i<G4int(p3); i++) loss += 1./(1.-w*G4UniformRand()) ;
|
||||
loss *= e0*Corrfac ;
|
||||
}
|
||||
}
|
||||
@@ -1016,22 +1021,21 @@ G4double G4VEnergyLoss::GetLossWithFluct(const G4DynamicParticle* aParticle,
|
||||
if(a1>alim)
|
||||
{
|
||||
siga=sqrt(a1) ;
|
||||
p1 = G4std::max(0,int(G4RandGauss::shoot(a1,siga)+0.5));
|
||||
p1 = G4std::max(0.,G4RandGauss::shoot(a1,siga)+0.5);
|
||||
}
|
||||
else
|
||||
p1 = G4Poisson(a1);
|
||||
p1 = G4float(G4Poisson(a1));
|
||||
|
||||
// excitation type 2
|
||||
if(a2>alim)
|
||||
{
|
||||
siga=sqrt(a2) ;
|
||||
p2 = G4std::max(0,int(G4RandGauss::shoot(a2,siga)+0.5));
|
||||
p2 = G4std::max(0.,G4RandGauss::shoot(a2,siga)+0.5);
|
||||
}
|
||||
else
|
||||
p2 = G4Poisson(a2);
|
||||
p2 = G4float(G4Poisson(a2));
|
||||
|
||||
loss = p1*e1Fluct+p2*e2Fluct;
|
||||
|
||||
// smearing to avoid unphysical peaks
|
||||
if(p2 > 0)
|
||||
loss += (1.-2.*G4UniformRand())*e2Fluct;
|
||||
@@ -1044,26 +1048,26 @@ G4double G4VEnergyLoss::GetLossWithFluct(const G4DynamicParticle* aParticle,
|
||||
if(a3>alim)
|
||||
{
|
||||
siga=sqrt(a3) ;
|
||||
p3 = G4std::max(0,int(G4RandGauss::shoot(a3,siga)+0.5));
|
||||
p3 = G4std::max(0.,G4RandGauss::shoot(a3,siga)+0.5);
|
||||
}
|
||||
else
|
||||
p3 = G4Poisson(a3);
|
||||
p3 = G4float(G4Poisson(a3));
|
||||
|
||||
lossc = 0.;
|
||||
if(p3 > 0)
|
||||
{
|
||||
na = 0.;
|
||||
alfa = 1.;
|
||||
if (p3 > nmaxCont2)
|
||||
if (p3 > G4float(nmaxCont2))
|
||||
{
|
||||
dp3 = G4float(p3);
|
||||
dp3 = p3;
|
||||
rfac = dp3/(G4float(nmaxCont2)+dp3);
|
||||
namean = G4float(p3)*rfac;
|
||||
namean = p3*rfac;
|
||||
sa = G4float(nmaxCont1)*rfac;
|
||||
na = G4RandGauss::shoot(namean,sa);
|
||||
if (na > 0.)
|
||||
{
|
||||
alfa = w1*G4float(nmaxCont2+p3)/(w1*G4float(nmaxCont2)+G4float(p3));
|
||||
alfa = w1*(G4float(nmaxCont2)+p3)/(w1*G4float(nmaxCont2)+p3);
|
||||
alfa1 = alfa*log(alfa)/(alfa-1.);
|
||||
ea = na*ipotFluct*alfa1;
|
||||
sea = ipotFluct*sqrt(na*(alfa-alfa1*alfa1));
|
||||
@@ -1071,7 +1075,7 @@ G4double G4VEnergyLoss::GetLossWithFluct(const G4DynamicParticle* aParticle,
|
||||
}
|
||||
}
|
||||
|
||||
nb = G4int(G4float(p3)-na);
|
||||
nb = G4int(p3-na);
|
||||
if (nb > 0)
|
||||
{
|
||||
w2 = alfa*ipotFluct;
|
||||
@@ -1083,6 +1087,9 @@ G4double G4VEnergyLoss::GetLossWithFluct(const G4DynamicParticle* aParticle,
|
||||
}
|
||||
}
|
||||
|
||||
if( loss < 0.)
|
||||
loss = 0.;
|
||||
|
||||
return loss ;
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user