Gabriele Cosmo
148 lines
4.1 KiB
C++
148 lines
4.1 KiB
C++
// This code implementation is the intellectual property of
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// the RD44 GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4PiMinusStopC.cc,v 2.5 1998/09/18 16:53:59 pia Exp $
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// GEANT4 tag $Name: geant4-00 $
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//
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// -------------------------------------------------------------------
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// GEANT 4 class file --- Copyright CERN 1998
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// CERN Geneva Switzerland
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//
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// For information related to this code contact:
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// CERN, IT Division, ASD group
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//
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// File name: G4PiMinusStopC
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//
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// Author: Maria Grazia Pia (pia@genova.infn.it)
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//
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// Creation date: 8 May 1998
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//
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// Modifications:
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// -------------------------------------------------------------------
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#include "G4ios.hh"
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#include "G4PiMinusStopC.hh"
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#include <rw/tpordvec.h>
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#include <rw/tvordvec.h>
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#include <rw/cstring.h>
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#include "globals.hh"
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#include "Randomize.hh"
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#include "G4Proton.hh"
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#include "G4Neutron.hh"
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#include "G4ParticleTypes.hh"
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#include "G4ReactionKinematics.hh"
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#include "G4DynamicParticleVector.hh"
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#include "G4LorentzVector.hh"
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#include "G4NucleiPropertiesTable.hh"
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#include "G4PiMinusStopMaterial.hh"
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#include "G4DistributionGenerator.hh"
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// np/pp production ratio
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// Experimental values:
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// R(np/pp) = 6.3 +- 1.4 (P. Heusi et al. (Nucl. Phys. A407, 429 [1983])
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// R = 5.0 +- 1.5 (Ozaki et al.)
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// R = 8.8 +- 1.3 (Lee et al.)
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// R = 2.4 +- 1.0 (Nordberg et al.)
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// Use average value of the first three ones
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G4double G4PiMinusStopC::npRatio = 6.7;
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// Average numbers of final nucleons detected, for N-pair absorption
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// R. Madey et al., Phys. Rev. C25(1982) 3050
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G4double G4PiMinusStopC::nFinalNucleons = 1.77;
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// Kinetic energy (MeV) distributions measured for coincident nucleon
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// emission
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// P. Heusi et al., Nucl. Phys. A407(1983) 429
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G4int G4PiMinusStopC::eKinEntries = 21;
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G4double G4PiMinusStopC::eKinData[21] = { 0.031, 0.045, 0.06, 0.09,
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0.11, 0.116, 0.14,
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0.18, 0.21, 0.25,
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0.3, 0.32, 0.31, 0.3,
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0.25, 0.18, 0.16,
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0.15, 0.08, 0.05, 0.01};
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G4double G4PiMinusStopC::eKin[22] = { 8., 17.5, 21., 24.5,
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27.5, 31., 33.5,
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37.5, 42.5, 46.4,
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49., 52.5, 57.5, 62.5,
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67.5, 72.5, 75.,
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77.5, 82.5, 87.5, 92.5, 110. };
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//G4double G4PiMinusStopC::eKin[22] = { 15., 20., 22., 25.,
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// 30., 32., 36.,
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// 40., 45., 48.,
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// 50., 54., 60., 65.,
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// 70., 75., 78.,
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// 80., 86., 90., 95., 100. };
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// Opening angle distributions measured for coincident nucleon emission
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// R. Hartmann et al., Nucl. Phys. A308 (1978) 345
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G4int G4PiMinusStopC::angleEntries = 7;
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G4double G4PiMinusStopC::angleData[7] =
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{ 1.43, 1.67, 2.62, 4.29, 7.62, 11.90, 14.76 };
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G4double G4PiMinusStopC::angle[8] = { 1.308997, 1.570796, 1.832596, 2.094395,
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2.356194, 2.617994, 2.967060, 3.1415927 };
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// Constructor
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G4PiMinusStopC::G4PiMinusStopC()
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{
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// Cluster size: nucleon pair, alpha, triton etc.
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// First implementation: interaction with nucleon pair only
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_clusterSize = 2;
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// R ratio
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_R = 1. / (1. + npRatio);
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_definitions = new RWTPtrOrderedVector<G4ParticleDefinition>();
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_momenta = new RWTPtrOrderedVector<G4LorentzVector>();
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RWTValOrderedVector<double> eKinVector;
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RWTValOrderedVector<double> eKinDataVector;
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int i;
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for (i=0; i<eKinEntries; i++)
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{
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eKinVector.insert(eKin[i]);
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eKinDataVector.insert(eKinData[i]);
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}
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eKinVector.insert(eKin[eKinEntries]);
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_distributionE = new G4DistributionGenerator(eKinVector,eKinDataVector);
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RWTValOrderedVector<double> angleVector;
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RWTValOrderedVector<double> angleDataVector;
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for (i=0; i<angleEntries; i++)
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{
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angleVector.insert(angle[i]);
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angleDataVector.insert(angleData[i]);
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}
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angleVector.insert(angle[angleEntries]);
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_distributionAngle = new G4DistributionGenerator(angleVector,angleDataVector);
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}
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// Destructor
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G4PiMinusStopC::~G4PiMinusStopC()
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{}
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G4double G4PiMinusStopC::FinalNucleons()
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{
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return nFinalNucleons;
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}
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