Geant4_10
G4PairingCorrection.cc
Go to the documentation of this file.
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 // $Id: G4PairingCorrection.cc 69585 2013-05-08 14:17:58Z gcosmo $
27 //
28 // Hadronic Process: Nuclear De-excitations
29 // by V. Lara
30 //
31 // Modified:
32 // 21.03.2013 V.Ivanchenko redesigned and cleaned up
33 
34 #include "G4PairingCorrection.hh"
35 #include "G4SystemOfUnits.hh"
36 
37 G4PairingCorrection* G4PairingCorrection::theInstance = 0;
38 
39 G4PairingCorrection::G4PairingCorrection()
40 {}
41 
43 {}
44 
46 {
47  if (!theInstance) {
48  static G4PairingCorrection theCorrections;
49  theInstance = &theCorrections;
50  }
51  return theInstance;
52 }
53 
55 {
56  G4double PCorrection = 0.0;
57  G4int N = A - Z;
58  if (theCookPairingCorrections.IsInTableThisN(N) &&
59  theCookPairingCorrections.IsInTableThisZ(Z)) {
60 
61  PCorrection = theCookPairingCorrections.GetParingCorrection(A,Z);
62 
63  } else if (theCameronGilbertPairingCorrections.IsInTableThisN(N) &&
64  theCameronGilbertPairingCorrections.IsInTableThisZ(Z)) {
65 
66  PCorrection =
67  theCameronGilbertPairingCorrections.GetPairingCorrection(A,Z);
68 
69  } else {
70 
71  static const G4double PairingConstant = 12.0*MeV;
72  G4double Pair = (1 - Z + 2*(Z/2)) + (1 - N + 2*(N/2));
73  PCorrection = Pair*PairingConstant/std::sqrt(static_cast<G4double>(A));
74  }
75  return std::max(PCorrection,0.0);
76 }
77 
78 
79 G4double
81 {
82  static const G4double PairingConstant = 14.0*MeV;
83  G4int N = A - Z;
84  G4double Pair = (1 - Z + 2*(Z/2)) + (1 - N + 2*(N/2));
85  G4double PCorrection =
86  Pair*PairingConstant/std::sqrt(static_cast<G4double>(A));
87  return PCorrection;
88 }
int G4int
Definition: G4Types.hh:78
Float_t Z
Definition: plot.C:39
G4double GetPairingCorrection(G4int A, G4int Z) const
G4bool IsInTableThisN(const G4int N) const
static G4PairingCorrection * GetInstance()
G4double GetFissionPairingCorrection(G4int A, G4int Z) const
G4double GetPairingCorrection(G4int A, G4int Z) const
G4double GetParingCorrection(G4int A, G4int Z) const
T max(const T t1, const T t2)
brief Return the largest of the two arguments
**D E S C R I P T I O N
Definition: HEPEvtcom.cc:77
double G4double
Definition: G4Types.hh:76
G4bool IsInTableThisZ(const G4int Z) const