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This commit is contained in:
Gabriele Cosmo
2018-06-29 10:58:11 +02:00
parent fe81a77428
commit 6aa23be517
1581 changed files with 124288 additions and 83758 deletions
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source/processes/hadronic/models/de_excitation/util/include/G4ChatterjeeCrossSection.hh
+3 -57
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@@ -33,72 +33,18 @@
#ifndef G4ChatterjeeCrossSection_h
#define G4ChatterjeeCrossSection_h 1
#include <CLHEP/Units/SystemOfUnits.h>
#include "globals.hh"
#include "G4Pow.hh"
static const G4double emax = 50*CLHEP::MeV;
// index: 0-neutron, 1-proton, 2-deuteron, 3-triton, 4-He3, 5-He4
// parameters: p0, p1, p2, landa0, landa1, mu0, mu1, nu0, nu1, nu2, ra
static const G4double paramC[6][11] = {
// n from Becchetti and Greenlees
{ 0., 0., 0., 18.57, -22.93, 381.7, 24.31, 0.172, -15.39, 804.8, 0.0},
// p from Bechetti and Greenlees
{15.72, 9.65, -449., 0.00437,-16.58, 244.7, 0.503, 273.1, -182.4, -1.872, 0.0},
// d from Lohr and Haeberli
{-38.21,922.6,-2804.,-0.0323, -5.48, 336.1, 0.48, 524.3, -371.8, -5.924, 1.2},
// t from Becchetti and Greenlees
{-11.04,619.1,-2147., 0.0426, -10.33, 601.9, 0.37, 583.0, -546.2, 1.718, 1.2},
// 3he from Becchetti and Greenlees
{-3.06, 278.5,-1389.,-0.00535,-11.16, 555.5, 0.4, 687.4, -476.3, 0.509, 1.2},
// alpha from huizenga and igo
{10.95, -85.2, 1146., 0.0643, -13.96, 781.2, 0.29, -304.7, -470.0, -8.58, 1.2}
};
class G4ChatterjeeCrossSection
{
public:
static G4double ComputePowerParameter(G4int resA, G4int idx)
{
return G4Pow::GetInstance()->powZ(resA, paramC[idx][6]);
}
static G4double ComputeCrossSection(G4double K, G4double cb, G4double resA13, G4double amu1,
G4int idx, G4int Z, G4int resA)
{
G4double sig;
G4double Kc = std::min(K, emax);
// parameterisation for neutron
if(0 == Z) {
G4double landa = paramC[idx][3]/resA13 + paramC[idx][4];
G4double mu = (paramC[idx][5] + paramC[idx][6]*resA13)*resA13;
G4double nu = std::abs((paramC[idx][7]*resA + paramC[idx][8]*resA13)*resA13
+ paramC[idx][9]);
sig = landa*Kc + mu + nu/Kc;
// parameterisation for charged
} else {
//JMQ 20.04.2015 1.5 F
G4double ec = cb;
//G4double ec = 1.44 * Z * resZ / (1.5*resA13 + paramC[idx][10]);
G4double ecsq = ec*ec;
G4double p = paramC[idx][0] + paramC[idx][1]/ec + paramC[idx][2]/(ecsq);
G4double landa = paramC[idx][3]*resA + paramC[idx][4];
G4double mu = paramC[idx][5]*amu1;
G4double nu = amu1* (paramC[idx][7] + paramC[idx][8]*ec + paramC[idx][9]*ecsq);
G4double q = landa - nu/ecsq - 2*p*ec;
G4double r = mu + 2*nu/ec + p*ecsq;
G4double ji= std::max(Kc, ec);
if(Kc < ec) { sig = p*Kc*Kc + q*Kc + r; }
else { sig = p*(Kc - ji)*(Kc - ji) + landa*Kc + mu + nu*(2 - Kc/ji)/ji; }
}
sig = std::max(sig, 0.0);
return sig;
}
static G4double ComputeCrossSection(G4double K, G4double cb,
G4double resA13, G4double amu1,
G4int idx, G4int Z, G4int resA);
};
#endif