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This commit is contained in:
Gabriele Cosmo
2016-06-09 15:07:44 +02:00
parent fe73f43734
commit 75c7fd177d
764 changed files with 45230 additions and 95238 deletions
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source/processes/hadronic/cross_sections/src/G4UPiNuclearCrossSection.cc
+25 -13
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@@ -28,7 +28,10 @@
// based on Barashenkov parametrisations of pion data
//
// 16.08.06 V.Ivanchenko - first implementation on base of
// J.P Wellisch class G4PiNuclearCrossSection
// J.P Wellisch class G4PiNuclearCrossSection
// 22.01.07 V.Ivanchenko - add cross section interfaces with Z and A
// 05.03.07 V.Ivanchenko - fix weight for interpolation
// 13.03.07 V.Ivanchenko - cleanup at low energies
//
#include "G4UPiNuclearCrossSection.hh"
@@ -52,7 +55,7 @@ G4UPiNuclearCrossSection::~G4UPiNuclearCrossSection()
}
G4double G4UPiNuclearCrossSection::GetElasticCrossSection(
const G4DynamicParticle* dp, const G4Element* elm)
const G4DynamicParticle* dp, G4double Z, G4double A)
{
G4double cross = 0.0;
G4PhysicsTable* table = 0;
@@ -60,13 +63,12 @@ G4double G4UPiNuclearCrossSection::GetElasticCrossSection(
if(part == piPlus) table = piPlusElastic;
else if(part == piMinus) table = piMinusElastic;
if(table)
cross = Interpolate(elm->GetZ(),elm->GetA(),
dp->GetKineticEnergy(),table);
cross = Interpolate(Z, A, dp->GetKineticEnergy(),table);
return cross;
}
G4double G4UPiNuclearCrossSection::GetInelasticCrossSection(
const G4DynamicParticle* dp, const G4Element* elm)
const G4DynamicParticle* dp, G4double Z, G4double A)
{
G4double cross = 0.0;
G4double fact = 1.0;
@@ -79,7 +81,7 @@ G4double G4UPiNuclearCrossSection::GetInelasticCrossSection(
if(ekin > elowest) {
table = piPlusInelastic;
if(ekin < elow) {
fact = ekin/elow;
fact = std::sqrt((ekin-elowest)/(elow-elowest));
ekin = elow;
}
}
@@ -88,7 +90,7 @@ G4double G4UPiNuclearCrossSection::GetInelasticCrossSection(
if(ekin < elow) ekin = elow;
}
if(table)
cross = fact*Interpolate(elm->GetZ(), elm->GetA(), ekin, table);
cross = fact*Interpolate(Z, A, ekin, table);
return cross;
}
@@ -102,8 +104,14 @@ G4double G4UPiNuclearCrossSection::Interpolate(
G4double x = (((*table)[idx])->GetValue(ekin, b));
// one of elements in the table
if(iz >= theZ[idx]) {
G4double A1 = theA[idx];
x *= std::pow(A/A1,aPower);
// Interpolation between Z
if(iz < theZ[idx]) {
} else {
G4double x2 = x;
G4double x1 = x;
if(idx == 0) {
@@ -117,10 +125,14 @@ G4double G4UPiNuclearCrossSection::Interpolate(
G4double w1 = A - A1;
G4double w2 = A2 - A;
G4double y1 = x1*std::pow(A/A1,aPower);
G4double y2 = x2*std::pow(A/A2,aPower);
x = (w1*y1 + w2*y2)/(w1 + w2);
if(w1 <= 0.0) x = y1;
else {
G4double y2 = x2*std::pow(A/A2,aPower);
if(w2 <= 0.0) x = y2;
else x = (w2*y1 + w1*y2)/(w1 + w2);
}
}
return std::exp(x);
return x;
}
void G4UPiNuclearCrossSection::AddDataSet(const G4String& p,
@@ -132,8 +144,8 @@ void G4UPiNuclearCrossSection::AddDataSet(const G4String& p,
G4LPhysicsFreeVector* pvin = new G4LPhysicsFreeVector(n,e[0]*GeV,e[n-1]*GeV);
G4LPhysicsFreeVector* pvel = new G4LPhysicsFreeVector(n,e[0]*GeV,e[n-1]*GeV);
for(G4int i=0; i<n; i++) {
pvin->PutValues(i,e[i]*GeV,std::log(in[i]*millibarn));
pvel->PutValues(i,e[i]*GeV,std::log((tot[i]-in[i])*millibarn));
pvin->PutValues(i,e[i]*GeV,in[i]*millibarn);
pvel->PutValues(i,e[i]*GeV,std::max(0.0,(tot[i]-in[i])*millibarn));
}
if(p == "pi+") {
piPlusInelastic->push_back(pvin);