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This commit is contained in:
Gabriele Cosmo
2019-12-06 15:12:28 +01:00
parent b2a62ae692
commit 5baee230e9
2997 changed files with 141580 additions and 98673 deletions
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source/processes/hadronic/cross_sections/src/G4UPiNuclearCrossSection.cc
+35 -69
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@@ -45,6 +45,7 @@
G4int G4UPiNuclearCrossSection::theZ[NZ] =
{2,4,6,7,8,11,13,20,26,29,42,48,50,74,82,92};
G4int G4UPiNuclearCrossSection::idxZ[93] = {0};
G4double G4UPiNuclearCrossSection::theA[NZ] = {0.0};
G4double G4UPiNuclearCrossSection::APower[93] = {0.0};
@@ -65,13 +66,7 @@ G4UPiNuclearCrossSection::G4UPiNuclearCrossSection()
piMinus = G4PionMinus::PionMinus();
aPower = 0.75;
elow = 20.0*MeV;
elowest = MeV;
G4NistManager* nist = G4NistManager::Instance();
G4Pow* g4pow = G4Pow::GetInstance();
for(G4int i=1; i<93; ++i) {
APower[i] = g4pow->powA(nist->GetAtomicMassAmu(i),aPower);
}
elow = 20.0*CLHEP::MeV;
}
G4UPiNuclearCrossSection::~G4UPiNuclearCrossSection()
@@ -107,74 +102,29 @@ G4UPiNuclearCrossSection::IsElementApplicable(const G4DynamicParticle*,
return (1 < Z);
}
G4double
G4UPiNuclearCrossSection::GetElasticCrossSection(const G4DynamicParticle* dp,
G4int Z, G4int A) const
{
G4double cross = 0.0;
const G4ParticleDefinition* part = dp->GetDefinition();
G4PhysicsTable* table = (part == piPlus) ? piPlusElastic : piMinusElastic;
if(table) {
cross = Interpolate(Z, A, dp->GetKineticEnergy(),table);
}
return cross;
}
G4double
G4UPiNuclearCrossSection::GetInelasticCrossSection(const G4DynamicParticle* dp,
G4int Z, G4int A) const
{
G4double cross = 0.0;
G4double fact = 1.0;
G4double ekin = dp->GetKineticEnergy();
G4PhysicsTable* table = nullptr;
const G4ParticleDefinition* part = dp->GetDefinition();
// Coulomb barrier
if(part == piPlus) {
if(ekin > elowest) {
table = piPlusInelastic;
if(ekin < elow) {
fact = std::sqrt((ekin-elowest)/(elow-elowest));
ekin = elow;
}
}
} else if(part == piMinus) {
table = piMinusInelastic;
ekin = std::max(ekin,elow);
}
if(table) {
cross = fact*Interpolate(Z, A, ekin, table);
}
return cross;
}
G4double G4UPiNuclearCrossSection::Interpolate(
G4int Z, G4int A, G4double ekin, G4PhysicsTable* table) const
G4int Z, G4int A, G4double e, const G4PhysicsTable* table) const
{
G4double res = 0.0;
G4int idx;
G4int iz = std::min(Z, 92);
for(idx=0; idx<NZ; ++idx) { if(theZ[idx] >= iz) break; }
if(idx >= NZ) { idx = NZ - 1; }
G4int iz2 = theZ[idx];
// G4cout << "U: iz= " << iz << " iz2= " << iz2 << " "
// << APower[iz] << " " << APower[iz2]<<G4endl;
G4double x2 = (((*table)[idx])->Value(ekin))*APower[iz]/APower[iz2];
// use only one Z
if(iz >= theZ[idx] || idx == 0) {
res = x2;
// Interpolation between Z
G4double ekin = std::max(e, elow);
G4int iz = std::min(Z, 92);
G4int idx = idxZ[iz];
size_t jdx = (size_t)(std::max(ekin - elow, 0.0)*0.06);
//G4cout << "Interpolate: Z= " << iz << " A= " << A << " idx= " << idx
// << " jdx= " << jdx << " Ekin= " << ekin << G4endl;
if(idx < 0 || 2 == iz) {
res = ((*table)[std::abs(idx)])->Value(ekin, jdx);
//G4cout << "1: jdx= " << jdx << G4endl;
} else {
G4int iz2 = theZ[idx];
G4double x2 = (((*table)[idx])->Value(ekin, jdx))*APower[iz]/APower[iz2];
//G4cout << "2: jdx= " << jdx << G4endl;
G4int iz1 = theZ[idx-1];
G4double x1 = (((*table)[idx-1])->Value(ekin))*APower[iz]/APower[iz1];
G4double w1 = G4double(A) - theA[idx-1];
G4double w2 = theA[idx] - G4double(A);
res = (w1*x2 + w2*x1)/(w1 + w2);
G4double x1 = (((*table)[idx-1])->Value(ekin, jdx))*APower[iz]/APower[iz1];
G4double w1 = ((G4double)A - theA[idx-1])/(theA[idx] - theA[idx-1]);
res = w1*x2 + (1.0 - w1)*x1;
}
//G4cout << " res(nb)= " << res/CLHEP::barn << G4endl;
return res;
}
@@ -218,6 +168,8 @@ void G4UPiNuclearCrossSection::DumpPhysicsTable(const G4ParticleDefinition& p)
void G4UPiNuclearCrossSection::BuildPhysicsTable(const G4ParticleDefinition& p)
{
//G4cout << "G4UPiNuclearCrossSection::BuildPhysicsTable for "
// << p.GetParticleName() << " " << piPlusElastic << G4endl;
if(piPlusElastic) { return; }
if(&p != piPlus && &p != piMinus) {
@@ -243,9 +195,22 @@ void G4UPiNuclearCrossSection::BuildPhysicsTable(const G4ParticleDefinition& p)
if(!isMaster) { return; }
G4NistManager* nist = G4NistManager::Instance();
G4Pow* g4pow = G4Pow::GetInstance();
for(G4int i=0; i<NZ; ++i) {
theA[i] = nist->GetAtomicMassAmu(theZ[i]);
}
for(G4int i=1; i<93; ++i) {
APower[i] = g4pow->powA(nist->GetAtomicMassAmu(i),aPower);
}
G4int idx = 1;
for(G4int i=3; i<93; ++i) {
if(theZ[idx] == i) {
idxZ[i] = -idx;
++idx;
} else {
idxZ[i] = idx;
}
}
piPlusElastic = new G4PhysicsTable();
piPlusInelastic = new G4PhysicsTable();
@@ -253,6 +218,7 @@ void G4UPiNuclearCrossSection::BuildPhysicsTable(const G4ParticleDefinition& p)
piMinusInelastic = new G4PhysicsTable();
LoadData();
//G4cout << "### Initialisation done " << G4endl;
}
void G4UPiNuclearCrossSection::LoadData()