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25 //
26 // G4HyperNucleiProperties class implementation
27 //
28 // Author: Mikhail Kosov
29 // Revision: H.Kurashige, Migrated to particles category - September 2007
30 // --------------------------------------------------------------------
31
32 #include "G4HyperNucleiProperties.hh"
33
34 #include "G4Exp.hh"
35 #include "G4NucleiProperties.hh"
36 #include "G4ParticleTable.hh"
37 #include "G4PhysicalConstants.hh"
38 #include "G4Pow.hh"
39 #include "G4SystemOfUnits.hh"
40
41 G4double G4HyperNucleiProperties::GetNuclearMass(G4int A, G4int Z, G4int LL)
42 {
43 if (LL == 0) return G4NucleiProperties::GetNuclearMass(A, Z);
44
45 if (A < 2 || Z < 0 || Z > A - LL || LL > A) {
46 #ifdef G4VERBOSE
47 if (G4ParticleTable::GetParticleTable()->GetVerboseLevel() > 0) {
48 G4cout << "G4HyperNucleiProperties::GetNuclearMass: "
49 << " Wrong values for A = " << A << " Z = " << Z << " L = " << LL << G4endl;
50 }
51 #endif
52 return 0.0;
53 }
54 if (A == 2) {
55 #ifdef G4VERBOSE
56 if (G4ParticleTable::GetParticleTable()->GetVerboseLevel() > 0) {
57 G4cout << "G4HyperNucleiProperties::GetNuclearMass: "
58 << " No boud state for A = " << A << " Z = " << Z << " L = " << LL << G4endl;
59 }
60 #endif
61 return 0.0;
62 }
63
64 static const G4double b7 = 25.0 * MeV;
65 static const G4double b8 = 10.5; // Slope
66 static const G4double a2 = 0.13 * MeV; // BindingEnergy for d+Lambda(MeV)
67 static const G4double a3 = 2.2 * MeV; // BindingEnergy for (t/He3)+Lamb(MeV)
68 static const G4double eps = 0.0001 * MeV; // security value (MeV)
69
70 G4double mass = G4NucleiProperties::GetNuclearMass(A - LL, Z); // A non-"strange" nucleus
71
72 // Temporarily, the mass of the Lambda below is copied from G4Lambda.cc,
73 // but it should be added in CLHEP/Units/PhysicalConstants.h
74 const G4double mLL = 1.115683 * CLHEP::GeV;
75
76 G4double bs = 0.0;
77 if (A - LL == 2)
78 bs = a2; // for nnL,npL,ppL
79 else if (A - LL == 3)
80 bs = a3; // for 3nL,2npL,n2pL,3pL
81 else if (A - LL > 3)
82 bs = b7 * G4Exp(-b8 / (A - LL + 1.0));
83 mass += LL * (mLL - bs) + eps;
84
85 return mass;
86 }
87
88 G4double G4HyperNucleiProperties::GetAtomicMass(G4int A, G4int Z, G4int LL)
89 {
90 G4double mass = GetNuclearMass(A, Z, LL);
91 if (mass > 0.0) {
92 mass += Z * electron_mass_c2 - 1.433e-5 * MeV * G4Pow::GetInstance()->powZ(Z, 2.39);
93 }
94 return mass;
95 }
96