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G4HyperNucleiProperties.cc
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25 //
26 //
27 // ------------------------------------------------------------
28 // GEANT 4 class header file
29 //
30 // ------------------------------------------------------------
31 // Hyper Nuclei properties based on CHIPS model (Mikhail KOSOV)
32 // Migrate into particles category by H.Kurashige (Sep. 2007)
33 //
34 #include "G4PhysicalConstants.hh"
35 #include "G4SystemOfUnits.hh"
37 #include "G4NucleiProperties.hh"
38 #include "G4ParticleTable.hh"
39 
40 
42 {
43  if (LL==0) return G4NucleiProperties::GetNuclearMass(A, Z);
44 
46  if (A < 2 || Z < 0 || Z > A-LL || LL>A ) {
47 #ifdef G4VERBOSE
48  if (pTable->GetVerboseLevel()>0) {
49  G4cout << "G4HyperNucleiProperties::GetNuclearMass: "
50  << " Wrong values for A = " << A
51  << " Z = " << Z
52  << " L = " << LL
53  << G4endl;
54  }
55 #endif
56  return 0.0;
57  } else if( A==2 ) {
58 #ifdef G4VERBOSE
59  if (pTable->GetVerboseLevel()>0) {
60  G4cout << "G4HyperNucleiProperties::GetNuclearMass: "
61  << " No boud state for A = " << A
62  << " Z = " << Z
63  << " L = " << LL
64  << G4endl;
65  }
66 #endif
67  return 0.0;
68  }
69 
70 
71  G4ParticleDefinition* lambda = pTable->FindParticle("lambda");
72  if (lambda ==0) {
73 #ifdef G4VERBOSE
74  if (pTable->GetVerboseLevel()>0) {
75  G4cout << "G4HyperNucleiProperties::GetNuclearMass: "
76  << " Lambda is not defined " << G4endl;
77  }
78 #endif
79  return 0.0;
80  }
81  const G4double mLL= lambda->GetPDGMass(); // mLambda
82 
83  static const G4double b7=25.*MeV;
84  static const G4double b8=10.5; // Slope
85  static const G4double a2=0.13*MeV; // BindingEnergy for d+Lambda(MeV)
86  static const G4double a3=2.2*MeV; // BindingEnergy for (t/He3)+Lamb(MeV)
87  static const G4double eps =0.0001*MeV; // security value (MeV)
88 
90  // A non-"strange" nucleus
91  G4double bs=0.;
92  if (A-LL ==2) bs=a2; // for nnL,npL,ppL
93  else if(A-LL ==3) bs=a3; // for 3nL,2npL,n2pL,3pL
94  else if(A-LL >3) bs=b7*std::exp(-b8/(A-LL+1.));
95  mass += LL*(mLL-bs) + eps;
96 
97  return mass;
98 }
99 
100 
102 {
103  if (A < 1 || Z < 0 || Z > A-LL || LL > A || LL <0 ) {
104 #ifdef G4VERBOSE
105  if (G4ParticleTable::GetParticleTable()->GetVerboseLevel()>0) {
106  G4cout << "G4HyperNucleiProperties::GetAtomicMass: "
107  << " Wrong values for A = " << A
108  << " Z = " << Z
109  << " L = " << LL << G4endl;
110  }
111 #endif
112  return 0.0;
113 
114  } else {
115  G4double nuclearMass = GetNuclearMass(A, Z, LL);
116  return nuclearMass + Z*electron_mass_c2
117  - 1.433e-5*MeV*std::pow(G4double(Z),2.39);
118  }
119 }
120