Gabriele Cosmo
121 lines
4.4 KiB
C++
121 lines
4.4 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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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. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// $Id: G4HyperNucleiProperties.cc,v 1.4 2008/10/22 12:35:46 kurasige Exp $
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// GEANT4 tag $Name: geant4-09-02 $
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//
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// ------------------------------------------------------------
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// GEANT 4 class header file
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//
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// ------------------------------------------------------------
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// Hyper Nuclei properties based on CHIPS model (Mikhail KOSOV)
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// Migrate into particles category by H.Kurashige (Sep. 2007)
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//
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#include "G4HyperNucleiProperties.hh"
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#include "G4NucleiProperties.hh"
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#include "G4ParticleTable.hh"
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G4double G4HyperNucleiProperties::GetNuclearMass(G4int A, G4int Z, G4int L)
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{
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if (L==0) return G4NucleiProperties::GetNuclearMass(A, Z);
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G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
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if (A < 2 || Z < 0 || Z > A-L || L>A ) {
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#ifdef G4VERBOSE
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if (pTable->GetVerboseLevel()>0) {
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G4cout << "G4HyperNucleiProperties::GetNuclearMass: "
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<< " Wrong values for A = " << A
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<< " Z = " << Z
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<< " L = " << L
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<< G4endl;
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}
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#endif
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return 0.0;
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} else if( A==2 ) {
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#ifdef G4VERBOSE
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if (pTable->GetVerboseLevel()>0) {
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G4cout << "G4HyperNucleiProperties::GetNuclearMass: "
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<< " No boud state for A = " << A
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<< " Z = " << Z
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<< " L = " << L
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<< G4endl;
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}
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#endif
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return 0.0;
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}
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G4ParticleDefinition* lambda = pTable->FindParticle("lambda");
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if (lambda ==0) {
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#ifdef G4VERBOSE
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if (pTable->GetVerboseLevel()>0) {
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G4cout << "G4HyperNucleiProperties::GetNuclearMass: "
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<< " Lambda is not defined " << G4endl;
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}
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#endif
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return 0.0;
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}
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const G4double mL= lambda->GetPDGMass(); // mLambda
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static const G4double b7=25.*MeV;
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static const G4double b8=10.5; // Slope
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static const G4double a2=0.13*MeV; // BindingEnergy for d+Lambda(MeV)
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static const G4double a3=2.2*MeV; // BindingEnergy for (t/He3)+Lamb(MeV)
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static const G4double eps =0.0001*MeV; // security value (MeV)
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G4double mass = G4NucleiProperties::GetNuclearMass(A-L, Z);
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// A non-"strange" nucleus
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G4double bs=0.;
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if (A-L ==2) bs=a2; // for nnL,npL,ppL
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else if(A-L ==3) bs=a3; // for 3nL,2npL,n2pL,3pL
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else if(A-L >3) bs=b7*std::exp(-b8/(A-L+1.));
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mass += L*(mL-bs) + eps;
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return mass;
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}
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G4double G4HyperNucleiProperties::GetAtomicMass(G4int A, G4int Z, G4int L)
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{
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if (A < 1 || Z < 0 || Z > A-L || L > A || L <0 ) {
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#ifdef G4VERBOSE
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if (G4ParticleTable::GetParticleTable()->GetVerboseLevel()>0) {
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G4cout << "G4HyperNucleiProperties::GetAtomicMass: "
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<< " Wrong values for A = " << A
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<< " Z = " << Z
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<< " L = " << L << G4endl;
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}
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#endif
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return 0.0;
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} else {
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G4double nuclearMass = GetNuclearMass(A, Z, L);
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return nuclearMass + Z*electron_mass_c2
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- 1.433e-5*MeV*std::pow(G4double(Z),2.39);
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}
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}
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