Gabriele Cosmo
144 lines
4.6 KiB
C++
144 lines
4.6 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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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 *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4PiMinusStopN.cc,v 1.8 2002/12/12 19:18:38 gunter Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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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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//
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// File name: G4PiMinusStopN
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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 "G4PiMinusStopN.hh"
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#include "g4std/vector"
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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 (R. Madey et al., Phys Rev C25 (1982) 3050
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G4double G4PiMinusStopN::npRatio = 6.3;
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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 G4PiMinusStopN::nFinalNucleons = 1.76;
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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 G4PiMinusStopN::eKinEntries = 10;
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G4double G4PiMinusStopN::eKinData[10] = { 0.24, 1.08, 1.46, 1.69,
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1.79,
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1.69, 1.46, 1.08, 0.62, 0.24};
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G4double G4PiMinusStopN::eKin[11] = { 5.2, 15., 27., 41.5,
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49.6,
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57.7, 79.3, 94.4, 114., 125., 140.};
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// Opening angle distributions measured for coincident nucleon emission
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// (P.Heusi et al., Nucl. Phys. A407 (1983) 429
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G4int G4PiMinusStopN::angleEntries = 7;
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G4double G4PiMinusStopN::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 G4PiMinusStopN::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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G4PiMinusStopN::G4PiMinusStopN()
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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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theR = 1. / (1. + npRatio);
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_definitions = new G4std::vector<G4ParticleDefinition*>();
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_momenta = new G4std::vector<G4LorentzVector*>();
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G4std::vector<double> eKinVector;
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G4std::vector<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.push_back(eKin[i]);
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eKinDataVector.push_back(eKinData[i]);
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}
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eKinVector.push_back(eKin[eKinEntries]);
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_distributionE = new G4DistributionGenerator(eKinVector,eKinDataVector);
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G4std::vector<double> angleVector;
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G4std::vector<double> angleDataVector;
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for (i=0; i<angleEntries; i++)
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{
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angleVector.push_back(angle[i]);
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angleDataVector.push_back(angleData[i]);
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}
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angleVector.push_back(angle[angleEntries]);
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_distributionAngle = new G4DistributionGenerator(angleVector,angleDataVector);
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}
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// Destructor
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G4PiMinusStopN::~G4PiMinusStopN()
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{}
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G4double G4PiMinusStopN::FinalNucleons()
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{
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return nFinalNucleons;
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}
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