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geant4/source/processes/hadronic/cross_sections/src/G4BGGNucleonInelasticXS.cc
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Gabriele Cosmo 5baee230e9 Import Geant4 10.6.0 source tree
2019-12-06 15:12:28 +01:00

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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. *
// ********************************************************************
//
// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name: G4BGGNucleonInelasticXS
//
// Author: Vladimir Ivanchenko
//
// Creation date: 13.03.2007
// Modifications:
//
//
// -------------------------------------------------------------------
//
#include "G4BGGNucleonInelasticXS.hh"
#include "G4SystemOfUnits.hh"
#include "G4ComponentGGHadronNucleusXsc.hh"
#include "G4NucleonNuclearCrossSection.hh"
#include "G4HadronNucleonXsc.hh"
#include "G4ComponentSAIDTotalXS.hh"
#include "G4Proton.hh"
#include "G4Neutron.hh"
#include "G4NistManager.hh"
#include "G4Material.hh"
#include "G4Element.hh"
#include "G4Isotope.hh"
#include "G4Log.hh"
#include "G4Exp.hh"
#include "G4NuclearRadii.hh"
#include "G4CrossSectionDataSetRegistry.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
const G4double llog10 = G4Log(10.);
G4double G4BGGNucleonInelasticXS::theGlauberFacP[93] = {0.0};
G4double G4BGGNucleonInelasticXS::theCoulombFacP[93] = {0.0};
G4double G4BGGNucleonInelasticXS::theGlauberFacN[93] = {0.0};
G4double G4BGGNucleonInelasticXS::theCoulombFacN[93] = {0.0};
G4int G4BGGNucleonInelasticXS::theA[93] = {0};
#ifdef G4MULTITHREADED
G4Mutex G4BGGNucleonInelasticXS::nucleonInelasticXSMutex = G4MUTEX_INITIALIZER;
#endif
G4BGGNucleonInelasticXS::G4BGGNucleonInelasticXS(const G4ParticleDefinition* p)
: G4VCrossSectionDataSet("BarashenkovGlauberGribov")
{
verboseLevel = 0;
fGlauberEnergy = 91.*GeV;
fLowEnergy = 14.*MeV;
fNucleon = nullptr;
fGlauber = nullptr;
fHadron = nullptr;
theProton= G4Proton::Proton();
isProton = (theProton == p);
isMaster = false;
SetForAllAtomsAndEnergies(true);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4BGGNucleonInelasticXS::~G4BGGNucleonInelasticXS()
{
delete fHadron;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4bool G4BGGNucleonInelasticXS::IsElementApplicable(const G4DynamicParticle*,
G4int, const G4Material*)
{
return true;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4bool G4BGGNucleonInelasticXS::IsIsoApplicable(const G4DynamicParticle*,
G4int Z, G4int,
const G4Element*,
const G4Material*)
{
return (1 == Z);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4double
G4BGGNucleonInelasticXS::GetElementCrossSection(const G4DynamicParticle* dp,
G4int ZZ, const G4Material*)
{
G4double cross = 0.0;
G4double ekin = dp->GetKineticEnergy();
G4int Z = std::min(ZZ, 92);
if(1 == Z) {
cross = 1.0115*GetIsoCrossSection(dp,1,1);
} else {
if(ekin <= fLowEnergy) {
cross = (isProton) ? theCoulombFacP[Z] : theCoulombFacN[Z];
cross *= CoulombFactor(ekin, Z);
} else if(ekin > fGlauberEnergy) {
cross = (isProton) ? theGlauberFacP[Z] : theGlauberFacN[Z];
cross *= fGlauber->GetInelasticGlauberGribov(dp, Z, theA[Z]);
} else {
cross = fNucleon->GetElementCrossSection(dp, Z);
}
}
if(verboseLevel > 1) {
G4cout << "G4BGGNucleonInelasticXS::GetCrossSection for "
<< dp->GetDefinition()->GetParticleName()
<< " Ekin(GeV)= " << dp->GetKineticEnergy()/CLHEP::GeV
<< " in nucleus Z= " << Z << " A= " << theA[Z]
<< " XS(b)= " << cross/barn
<< G4endl;
}
return cross;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4double
G4BGGNucleonInelasticXS::GetIsoCrossSection(const G4DynamicParticle* dp,
G4int Z, G4int A,
const G4Isotope*,
const G4Element*,
const G4Material*)
{
// this method should be called only for Z = 1
fHadron->HadronNucleonXscNS(dp->GetDefinition(), theProton,
dp->GetKineticEnergy());
G4double cross = A*fHadron->GetInelasticHadronNucleonXsc();
if(verboseLevel > 1) {
G4cout << "G4BGGNucleonInelasticXS::GetIsoCrossSection for "
<< dp->GetDefinition()->GetParticleName()
<< " Ekin(GeV)= " << dp->GetKineticEnergy()/CLHEP::GeV
<< " in nucleus Z= " << Z << " A= " << theA[Z]
<< " XS(b)= " << cross/barn
<< G4endl;
}
return cross;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4BGGNucleonInelasticXS::BuildPhysicsTable(const G4ParticleDefinition& p)
{
if(fNucleon) { return; }
if(&p == theProton || &p == G4Neutron::Neutron()) {
isProton = (theProton == &p);
} else {
G4ExceptionDescription ed;
ed << "This BGG cross section is applicable only to nucleons and not to "
<< p.GetParticleName() << G4endl;
G4Exception("G4BGGNucleonInelasticXS::BuildPhysicsTable", "had001",
FatalException, ed);
return;
}
fNucleon = new G4NucleonNuclearCrossSection();
fGlauber = new G4ComponentGGHadronNucleusXsc();
fHadron = new G4HadronNucleonXsc();
fNucleon->BuildPhysicsTable(p);
if(0 == theA[0]) {
#ifdef G4MULTITHREADED
G4MUTEXLOCK(&nucleonInelasticXSMutex);
if(0 == theA[0]) {
#endif
isMaster = true;
#ifdef G4MULTITHREADED
}
G4MUTEXUNLOCK(&nucleonInelasticXSMutex);
#endif
} else {
return;
}
if(isMaster && 0 == theA[0]) {
theA[0] = theA[1] = 1;
G4ThreeVector mom(0.0,0.0,1.0);
G4DynamicParticle dp(theProton, mom, fGlauberEnergy);
G4NistManager* nist = G4NistManager::Instance();
G4double csup, csdn;
if(verboseLevel > 0) {
G4cout << "### G4BGGNucleonInelasticXS::Initialise for "
<< p.GetParticleName() << G4endl;
}
for(G4int iz=2; iz<93; ++iz) {
G4int A = G4lrint(nist->GetAtomicMassAmu(iz));
theA[iz] = A;
csup = fGlauber->GetInelasticGlauberGribov(&dp, iz, A);
csdn = fNucleon->GetElementCrossSection(&dp, iz);
theGlauberFacP[iz] = csdn/csup;
}
dp.SetDefinition(G4Neutron::Neutron());
for(G4int iz=2; iz<93; ++iz) {
csup = fGlauber->GetInelasticGlauberGribov(&dp, iz, theA[iz]);
csdn = fNucleon->GetElementCrossSection(&dp, iz);
theGlauberFacN[iz] = csdn/csup;
if(verboseLevel > 0) {
G4cout << "Z= " << iz << " A= " << theA[iz]
<< " GFactorP= " << theGlauberFacP[iz]
<< " GFactorN= " << theGlauberFacN[iz] << G4endl;
}
}
theCoulombFacP[1] = theCoulombFacN[1] = 1.0;
dp.SetDefinition(theProton);
dp.SetKineticEnergy(fLowEnergy);
for(G4int iz=2; iz<93; ++iz) {
theCoulombFacP[iz] = fNucleon->GetElementCrossSection(&dp, iz)
/CoulombFactor(fLowEnergy, iz);
}
dp.SetDefinition(G4Neutron::Neutron());
for(G4int iz=2; iz<93; ++iz) {
theCoulombFacN[iz] = fNucleon->GetElementCrossSection(&dp, iz)
/CoulombFactor(fLowEnergy, iz);
if(verboseLevel > 0) {
G4cout << "Z= " << iz << " A= " << theA[iz]
<< " CFactorP= " << theCoulombFacP[iz]
<< " CFactorN= " << theCoulombFacN[iz] << G4endl;
}
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4double G4BGGNucleonInelasticXS::CoulombFactor(G4double kinEnergy, G4int Z)
{
G4double res = 0.0;
if(kinEnergy <= 0.0) { return res; }
G4double elog = G4Log(kinEnergy/GeV)/llog10;
G4double aa = theA[Z];
if(isProton) {
res = G4NuclearRadii::CoulombFactor(Z, theA[Z], theProton, kinEnergy);
// from G4ProtonInelasticCrossSection
if(res > 0.0) {
G4double ff1 = 5.6 - 0.016*aa; // slope of the drop at medium energies.
G4double ff2 = 1.37 + 1.37/aa; // start of the slope.
G4double ff3 = 0.8 + 18./aa - 0.002*aa; // stephight
res *= (1.0 + ff3*(1.0 - (1.0/(1+G4Exp(-ff1*(elog + ff2))))));
ff1 = 8. - 8./aa - 0.008*aa; // slope of the rise
ff2 = 2.34 - 5.4/aa - 0.0028*aa; // start of the rise
res /= (1.0 + G4Exp(-ff1*(elog + ff2)));
}
} else {
// from G4NeutronInelasticCrossSection
G4double p3 = 0.6 + 13./aa - 0.0005*aa;
G4double p4 = 7.2449 - 0.018242*aa;
G4double p5 = 1.36 + 1.8/aa + 0.0005*aa;
G4double p6 = 1. + 200./aa + 0.02*aa;
G4double p7 = 3.0 - (aa-70.)*(aa-200.)/11000.;
G4double firstexp = G4Exp(-p4*(elog + p5));
G4double secondexp = G4Exp(-p6*(elog + p7));
res = (1.+p3*firstexp/(1. + firstexp))/(1. + secondexp);
}
return res;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4BGGNucleonInelasticXS::CrossSectionDescription(std::ostream& outFile) const
{
outFile << "The Barashenkov-Glauber-Gribov cross section calculates inelastic\n"
<< "scattering of protons and neutrons from nuclei using the\n"
<< "Barashenkov parameterization below 91 GeV and the Glauber-Gribov\n"
<< "parameterization above 91 GeV. It uses the G4HadronNucleonXsc\n"
<< "cross section component for hydrogen targets, and the\n"
<< "G4ComponentGGHadronNucleusXsc component for other targets.\n";
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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