Gabriele Cosmo
160 lines
5.1 KiB
C++
160 lines
5.1 KiB
C++
//
|
|
// ********************************************************************
|
|
// * DISCLAIMER *
|
|
// * *
|
|
// * The following disclaimer summarizes all the specific disclaimers *
|
|
// * of contributors to this software. The specific disclaimers,which *
|
|
// * govern, are listed with their locations in: *
|
|
// * http://cern.ch/geant4/license *
|
|
// * *
|
|
// * 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. *
|
|
// * *
|
|
// * This code implementation is the intellectual property of the *
|
|
// * GEANT4 collaboration. *
|
|
// * By copying, distributing or modifying the Program (or any work *
|
|
// * based on the Program) you indicate your acceptance of this *
|
|
// * statement, and all its terms. *
|
|
// ********************************************************************
|
|
//
|
|
//
|
|
// $Id: G4PiMinusStopC.cc,v 1.9 2003/06/16 17:12:05 gunter Exp $
|
|
// GEANT4 tag $Name: geant4-05-02 $
|
|
//
|
|
// -------------------------------------------------------------------
|
|
// GEANT 4 class file --- Copyright CERN 1998
|
|
// CERN Geneva Switzerland
|
|
//
|
|
//
|
|
// File name: G4PiMinusStopC
|
|
//
|
|
// Author: Maria Grazia Pia (pia@genova.infn.it)
|
|
//
|
|
// Creation date: 8 May 1998
|
|
//
|
|
// Modifications:
|
|
// -------------------------------------------------------------------
|
|
|
|
#include "G4ios.hh"
|
|
|
|
#include "G4PiMinusStopC.hh"
|
|
|
|
#include <vector>
|
|
|
|
#include "globals.hh"
|
|
#include "Randomize.hh"
|
|
#include "G4Proton.hh"
|
|
#include "G4Neutron.hh"
|
|
#include "G4ParticleTypes.hh"
|
|
#include "G4ReactionKinematics.hh"
|
|
#include "G4DynamicParticleVector.hh"
|
|
#include "G4LorentzVector.hh"
|
|
#include "G4NucleiPropertiesTable.hh"
|
|
#include "G4PiMinusStopMaterial.hh"
|
|
#include "G4DistributionGenerator.hh"
|
|
|
|
// np/pp production ratio
|
|
// Experimental values:
|
|
// R(np/pp) = 6.3 +- 1.4 (P. Heusi et al. (Nucl. Phys. A407, 429 [1983])
|
|
// R = 5.0 +- 1.5 (Ozaki et al.)
|
|
// R = 8.8 +- 1.3 (Lee et al.)
|
|
// R = 2.4 +- 1.0 (Nordberg et al.)
|
|
// Use average value of the first three ones
|
|
G4double G4PiMinusStopC::npRatio = 6.7;
|
|
|
|
// Average numbers of final nucleons detected, for N-pair absorption
|
|
// R. Madey et al., Phys. Rev. C25(1982) 3050
|
|
G4double G4PiMinusStopC::nFinalNucleons = 1.77;
|
|
|
|
// Kinetic energy (MeV) distributions measured for coincident nucleon
|
|
// emission
|
|
// P. Heusi et al., Nucl. Phys. A407(1983) 429
|
|
|
|
G4int G4PiMinusStopC::eKinEntries = 21;
|
|
|
|
G4double G4PiMinusStopC::eKinData[21] = { 0.031, 0.045, 0.06, 0.09,
|
|
0.11, 0.116, 0.14,
|
|
0.18, 0.21, 0.25,
|
|
0.3, 0.32, 0.31, 0.3,
|
|
0.25, 0.18, 0.16,
|
|
0.15, 0.08, 0.05, 0.01};
|
|
|
|
G4double G4PiMinusStopC::eKin[22] = { 8., 17.5, 21., 24.5,
|
|
27.5, 31., 33.5,
|
|
37.5, 42.5, 46.4,
|
|
49., 52.5, 57.5, 62.5,
|
|
67.5, 72.5, 75.,
|
|
77.5, 82.5, 87.5, 92.5, 110. };
|
|
|
|
//G4double G4PiMinusStopC::eKin[22] = { 15., 20., 22., 25.,
|
|
// 30., 32., 36.,
|
|
// 40., 45., 48.,
|
|
// 50., 54., 60., 65.,
|
|
// 70., 75., 78.,
|
|
// 80., 86., 90., 95., 100. };
|
|
|
|
// Opening angle distributions measured for coincident nucleon emission
|
|
// R. Hartmann et al., Nucl. Phys. A308 (1978) 345
|
|
|
|
G4int G4PiMinusStopC::angleEntries = 7;
|
|
|
|
G4double G4PiMinusStopC::angleData[7] =
|
|
{ 1.43, 1.67, 2.62, 4.29, 7.62, 11.90, 14.76 };
|
|
|
|
G4double G4PiMinusStopC::angle[8] = { 1.308997, 1.570796, 1.832596, 2.094395,
|
|
2.356194, 2.617994, 2.967060, 3.1415927 };
|
|
|
|
|
|
|
|
// Constructor
|
|
|
|
G4PiMinusStopC::G4PiMinusStopC()
|
|
|
|
{
|
|
// Cluster size: nucleon pair, alpha, triton etc.
|
|
// First implementation: interaction with nucleon pair only
|
|
_clusterSize = 2;
|
|
|
|
// R ratio
|
|
theR = 1. / (1. + npRatio);
|
|
|
|
_definitions = new std::vector<G4ParticleDefinition*>();
|
|
_momenta = new std::vector<G4LorentzVector*>();
|
|
|
|
std::vector<double> eKinVector;
|
|
std::vector<double> eKinDataVector;
|
|
int i;
|
|
for (i=0; i<eKinEntries; i++)
|
|
{
|
|
eKinVector.push_back(eKin[i]);
|
|
eKinDataVector.push_back(eKinData[i]);
|
|
}
|
|
eKinVector.push_back(eKin[eKinEntries]);
|
|
_distributionE = new G4DistributionGenerator(eKinVector,eKinDataVector);
|
|
|
|
std::vector<double> angleVector;
|
|
std::vector<double> angleDataVector;
|
|
for (i=0; i<angleEntries; i++)
|
|
{
|
|
angleVector.push_back(angle[i]);
|
|
angleDataVector.push_back(angleData[i]);
|
|
}
|
|
angleVector.push_back(angle[angleEntries]);
|
|
_distributionAngle = new G4DistributionGenerator(angleVector,angleDataVector);
|
|
}
|
|
|
|
|
|
// Destructor
|
|
|
|
G4PiMinusStopC::~G4PiMinusStopC()
|
|
{}
|
|
|
|
G4double G4PiMinusStopC::FinalNucleons()
|
|
{
|
|
return nFinalNucleons;
|
|
}
|
|
|