Gabriele Cosmo
172 lines
4.8 KiB
C++
172 lines
4.8 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: G4NucleiPropertiesTheoreticalTable.hh,v 1.3.2.2 2001/06/28 20:19:09 gunter Exp $
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// GEANT4 tag $Name: $
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//
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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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// Class Description
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// Encapsulates Data from W.D. Myers, W.J. Swiatecki, P. Moller
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// and J.R. Nix, 1. Jan. 1995.
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// Atomic Mass Excess.
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// ----------------------------------------------------------------
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#ifndef G4NucleiPropertiesTheoreticalTable_h
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#define G4NucleiPropertiesTheoreticalTable_h 1
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#include "globals.hh"
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class G4NucleiPropertiesTheoreticalTable
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{
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private:
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// Default constructor
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G4NucleiPropertiesTheoreticalTable(G4double dummy);
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static G4NucleiPropertiesTheoreticalTable theInstance;
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public:
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// Destructor
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~G4NucleiPropertiesTheoreticalTable() { };
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enum {nEntries = 8979, shortTableSize = 137};
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// Other Operations
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public: // With Description
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// Operation: GetMassExcess
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static G4double GetMassExcess(G4int Z, G4int A);
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// Operation: GetNuclearMass
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static G4double GetNuclearMass(G4int Z, G4int A);
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// Operation: GetAtomicMass
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static G4double GetAtomicMass(G4int Z, G4int A);
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// Operation: GetBindingEnergy
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static G4double GetBindingEnergy(G4int Z, G4int A);
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// Is the nucleus (Z,A) in table?
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static G4bool IsInTable(G4int Z, G4int A);
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private:
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// Operation: GetIndex
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static G4int GetIndex(G4int Z, G4int A);
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static G4double ElectronicBindingEnergy(G4int Z);
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// Mass Excess
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static G4double AtomicMassExcess[nEntries];
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// Table of Z (number of protons) and A (number of nucleons)
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// indexArray[0][ ] --> Z
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// indexArray[1][ ] --> A
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static G4int indexArray[2][nEntries];
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// Reduced Table of Z for shorter index search.
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// The index in this table coincide with Z-1
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// For each Z value shortTable[Z-1] has the index of the 1st occurrence in
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// the indexArray[][]
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static G4int shortTable[shortTableSize];
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};
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inline G4double G4NucleiPropertiesTheoreticalTable::GetMassExcess(G4int Z, G4int A)
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{
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G4int i=GetIndex(Z, A);
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if (i >= 0) {
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return AtomicMassExcess[i]*MeV;
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} else {
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return 0.0;
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}
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}
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inline G4double G4NucleiPropertiesTheoreticalTable::GetBindingEnergy(G4int Z, G4int A)
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{
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G4int i=GetIndex(Z, A);
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if (i >= 0){
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const G4double Mh = 7.289034*MeV; // hydrogen atom mass excess
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const G4double Mn = 8.071431*MeV; // neutron mass excess
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return G4double(Z)*Mh + G4double(A-Z)*Mn - AtomicMassExcess[i]*MeV;
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} else {
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return 0.0;
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}
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}
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inline G4double G4NucleiPropertiesTheoreticalTable::GetAtomicMass(G4int Z, G4int A)
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{
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G4int i=GetIndex(Z, A);
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if (i >= 0) {
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return AtomicMassExcess[i]*MeV + A*amu_c2;
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} else {
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return 0.0;
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}
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}
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inline G4double G4NucleiPropertiesTheoreticalTable::GetNuclearMass(G4int Z, G4int A)
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{
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G4int i=GetIndex(Z, A);
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if (i >= 0) {
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return GetAtomicMass(Z,A) - G4double(Z)*electron_mass_c2 + ElectronicBindingEnergy(Z);
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} else {
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return 0.0;
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}
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}
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inline G4double G4NucleiPropertiesTheoreticalTable::ElectronicBindingEnergy(G4int Z) {
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const G4double ael = 1.433e-5*MeV; // electronic-binding constant
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return ael*pow(G4double(Z),2.39);
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}
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inline G4bool G4NucleiPropertiesTheoreticalTable::IsInTable(G4int Z, G4int A)
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{
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return (Z <= A && A >= 16 && A <= 339 && Z <= 136 && Z >= 8 && GetIndex(Z, A) >= 0);
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}
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#endif
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