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This commit is contained in:
Gabriele Cosmo
2016-06-09 15:58:43 +02:00
parent 96c8bcd0af
commit b79225fb37
7544 changed files with 245407 additions and 91099 deletions
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source/processes/hadronic/cross_sections/src/G4BGGNucleonElasticXS.cc
+95 -30
View File
@@ -23,8 +23,8 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4BGGNucleonElasticXS.cc,v 1.1 2007/03/13 15:19:30 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-01 $
// $Id: G4BGGNucleonElasticXS.cc,v 1.3 2008/12/01 16:50:23 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-02 $
//
// -------------------------------------------------------------------
//
@@ -45,31 +45,24 @@
#include "G4BGGNucleonElasticXS.hh"
#include "G4GlauberGribovCrossSection.hh"
#include "G4NucleonNuclearCrossSection.hh"
#include "G4HadronNucleonXsc.hh"
#include "G4Proton.hh"
#include "G4Neutron.hh"
#include "G4NistManager.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4BGGNucleonElasticXS::G4BGGNucleonElasticXS(const G4ParticleDefinition* p)
G4BGGNucleonElasticXS::G4BGGNucleonElasticXS(const G4ParticleDefinition*)
{
verboseLevel = 0;
thEnergy = 100.*GeV;
if(p == G4Proton::Proton() || p == G4Neutron::Neutron()) {
fNucleon = new G4NucleonNuclearCrossSection();
fGlauber = new G4GlauberGribovCrossSection();
particle = p;
Initialise();
} else {
fNucleon = 0;
fGlauber = 0;
particle = 0;
if(p) G4cout << "### G4BGGNucleonElasticXS WARNING: is not applicable to "
<< p->GetParticleName()
<< G4endl;
else G4cout << "### G4BGGNucleonElasticXS WARNING: particle is not defined "
<< G4endl;
}
fGlauberEnergy = 91.*GeV;
fLowEnergy = 20.*MeV;
fNucleon = 0;
fGlauber = 0;
fHadron = 0;
particle = 0;
isProton = false;
isInitialized = false;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
@@ -78,6 +71,7 @@ G4BGGNucleonElasticXS::~G4BGGNucleonElasticXS()
{
delete fGlauber;
delete fNucleon;
delete fHadron;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
@@ -89,13 +83,30 @@ G4double G4BGGNucleonElasticXS::GetIsoZACrossSection(const G4DynamicParticle* dp
{
G4double cross = 0.0;
G4double ekin = dp->GetKineticEnergy();
G4int iz = G4int(Z + 0.5);
G4int iz = G4int(Z);
if(iz > 92) iz = 92;
if(ekin > thEnergy) {
cross = theFac[iz]*fGlauber->GetElasticGlauberGribov(dp, Z, A);
if(ekin <= fLowEnergy) {
cross = theCoulombFac[iz];
if(isProton) { cross *= CoulombFactor(ekin, A); }
} else if(iz == 1) {
if( A < 1.5) {
//fHadron->GetHadronNucleonXscPDG(dp, G4Proton::Proton());
//fHadron->GetHadronNucleonXscEL(dp, G4Proton::Proton());
//fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton());
fHadron->GetHadronNucleonXscMK(dp, G4Proton::Proton());
cross = fHadron->GetElasticHadronNucleonXsc();
} else {
fHadron->GetHadronNucleonXscMK(dp, G4Proton::Proton());
cross = fHadron->GetElasticHadronNucleonXsc();
fHadron->GetHadronNucleonXscMK(dp, G4Neutron::Neutron());
cross += fHadron->GetElasticHadronNucleonXsc();
}
} else if(ekin > fGlauberEnergy) {
cross = theGlauberFac[iz]*fGlauber->GetElasticGlauberGribov(dp, Z, A);
} else {
cross = fNucleon->GetIsoZACrossSection(dp, Z, A);
cross = fNucleon->GetElasticCrossSection(dp, Z, A);
}
if(verboseLevel > 1)
@@ -111,8 +122,16 @@ G4double G4BGGNucleonElasticXS::GetIsoZACrossSection(const G4DynamicParticle* dp
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4BGGNucleonElasticXS::BuildPhysicsTable(const G4ParticleDefinition&)
void G4BGGNucleonElasticXS::BuildPhysicsTable(const G4ParticleDefinition& p)
{
if(&p == G4Proton::Proton() || &p == G4Neutron::Neutron()) {
particle = &p;
Initialise();
} else {
G4cout << "### G4BGGNucleonElasticXS WARNING: is not applicable to "
<< p.GetParticleName()
<< G4endl;
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
@@ -126,14 +145,23 @@ void G4BGGNucleonElasticXS::DumpPhysicsTable(const G4ParticleDefinition&)
void G4BGGNucleonElasticXS::Initialise()
{
if(isInitialized) return;
isInitialized = true;
fNucleon = new G4NucleonNuclearCrossSection();
fGlauber = new G4GlauberGribovCrossSection();
fHadron = new G4HadronNucleonXsc();
fNucleon->BuildPhysicsTable(*particle);
fGlauber->BuildPhysicsTable(*particle);
if(particle == G4Proton::Proton()) isProton = true;
G4ParticleDefinition* part = const_cast<G4ParticleDefinition*>(particle);
G4ThreeVector mom(0.0,0.0,1.0);
G4DynamicParticle dp(part, mom, thEnergy);
G4DynamicParticle dp(part, mom, fGlauberEnergy);
G4NistManager* nist = G4NistManager::Instance();
G4double A = nist->GetAtomicMassAmu(2);
G4double csup, csdn;
G4double A, csup, csdn;
if(verboseLevel > 0) G4cout << "### G4BGGNucleonElasticXS::Initialise for "
<< particle->GetParticleName() << G4endl;
@@ -144,14 +172,51 @@ void G4BGGNucleonElasticXS::Initialise()
A = nist->GetAtomicMassAmu(iz);
csup = fGlauber->GetElasticGlauberGribov(&dp, Z, A);
csdn = fNucleon->GetIsoZACrossSection(&dp, Z, A);
csdn = fNucleon->GetElasticCrossSection(&dp, Z, A);
theFac[iz] = csdn/csup;
theGlauberFac[iz] = csdn/csup;
if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A
<< " factor= " << theFac[iz] << G4endl;
<< " factor= " << theGlauberFac[iz] << G4endl;
}
dp.SetKineticEnergy(fLowEnergy);
fHadron->GetHadronNucleonXscMK(&dp, G4Proton::Proton());
theCoulombFac[1] = fHadron->GetElasticHadronNucleonXsc();
if(isProton) { theCoulombFac[1] /= CoulombFactor(fLowEnergy, 1.0); }
for(G4int iz=2; iz<93; iz++) {
G4double Z = G4double(iz);
A = nist->GetAtomicMassAmu(iz);
theCoulombFac[iz] = fNucleon->GetElasticCrossSection(&dp, Z, A);
if(isProton) { theCoulombFac[iz] /= CoulombFactor(fLowEnergy, A); }
if(verboseLevel > 0) G4cout << "Z= " << Z << " A= " << A
<< " factor= " << theCoulombFac[iz] << G4endl;
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4double G4BGGNucleonElasticXS::CoulombFactor(G4double kinEnergy, G4double A)
{
G4double res= 0.0;
if(kinEnergy <= DBL_MIN) return res;
else if(A < 1.5) return kinEnergy*kinEnergy;
G4double elog = std::log10(kinEnergy/GeV);
// from G4ProtonInelasticCrossSection
G4double f1 = 8.0 - 8.0/A - 0.008*A;
G4double f2 = 2.34 - 5.4/A - 0.0028*A;
res = 1.0/(1.0 + std::exp(-f1*(elog + f2)));
f1 = 5.6 - 0.016*A;
f2 = 1.37 + 1.37/A;
res *= ( 1.0 + (0.8 + 18./A - 0.002*A)/(1.0 + std::exp(f1*(elog + f2))));
return res;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......