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25 //
26 //
27 //
28 // Hadronic Process: Nuclear De-excitations
29 // by V. Lara
30
31 #include "G4StatMFFragment.hh"
32 #include "G4PhysicalConstants.hh"
33 #include "G4HadronicException.hh"
34 #include "G4Pow.hh"
35
36 // Copy constructor
37 G4StatMFFragment::G4StatMFFragment(const G4StatMFFragment & )
38 {
39 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::copy_constructor meant to not be accessible");
40 }
41
42 // Operators
43
44 G4StatMFFragment & G4StatMFFragment::
45 operator=(const G4StatMFFragment & )
46 {
47 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::operator= meant to not be accessible");
48 return *this;
49 }
50
51 G4bool G4StatMFFragment::operator==(const G4StatMFFragment & ) const
52 {
53 // throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::operator== meant to not be accessible");
54 return false;
55 }
56
57 G4bool G4StatMFFragment::operator!=(const G4StatMFFragment & ) const
58 {
59 // throw G4HadronicException(__FILE__, __LINE__, "G4StatMFFragment::operator!= meant to not be accessible");
60 return true;
61 }
62
63 G4double G4StatMFFragment::GetCoulombEnergy(void) const
64 {
65 G4double res = 0.0;
66 if (theZ >= 1) {
67 res = G4StatMFParameters::GetCoulomb();
68 }
69 return res;
70 }
71
72 G4double G4StatMFFragment::GetEnergy(const G4double T) const
73 {
74 if (theA < 1 || theZ < 0 || theZ > theA) {
75 G4cout << "G4StatMFFragment::GetEnergy: A = " << theA
76 << ", Z = " << theZ << G4endl;
77 throw G4HadronicException(__FILE__, __LINE__,
78 "G4StatMFFragment::GetEnergy: Wrong values for A and Z!");
79 }
80 G4double BulkEnergy = G4NucleiProperties::GetMassExcess(theA,theZ);
81
82 if (theA < 4) return BulkEnergy - GetCoulombEnergy();
83
84 G4double SurfaceEnergy;
85 if (G4StatMFParameters::DBetaDT(T) == 0.0) SurfaceEnergy = 0.0;
86 else SurfaceEnergy = 2.5*G4Pow::GetInstance()->Z23(theA)*T*T*
87 G4StatMFParameters::GetBeta0()/
88 (G4StatMFParameters::GetCriticalTemp()*
89 G4StatMFParameters::GetCriticalTemp());
90
91 G4double ExchangeEnergy = theA*T*T/GetInvLevelDensity();
92 if (theA != 4) ExchangeEnergy += SurfaceEnergy;
93 return BulkEnergy + ExchangeEnergy - GetCoulombEnergy();
94 }
95
96 G4double G4StatMFFragment::GetInvLevelDensity(void) const
97 {
98 G4double res = 0.0;
99 if (theA > 1) {
100 res = G4StatMFParameters::GetEpsilon0()*(1.0+3.0/(theA - 1.0));
101 }
102 return res;
103 }
104
105 G4Fragment * G4StatMFFragment::GetFragment(const G4double T)
106 {
107 G4double U = CalcExcitationEnergy(T);
108 G4double M = GetNuclearMass();
109 G4LorentzVector FourMomentum(_momentum,std::sqrt(_momentum.mag2()+(M+U)*(M+U)));
110 G4Fragment * theFragment = new G4Fragment(theA, theZ, FourMomentum);
111 return theFragment;
112 }
113
114 G4double G4StatMFFragment::CalcExcitationEnergy(const G4double T)
115 {
116 if (theA <= 3) return 0.0;
117
118 G4double BulkEnergy = theA*T*T/GetInvLevelDensity();
119
120 // if it is an alpha particle: done
121 if (theA == 4) return BulkEnergy;
122
123 // Term connected with surface energy
124 G4double SurfaceEnergy = 0.0;
125 G4double q = G4StatMFParameters::DBetaDT(T);
126 if (std::abs(q) > 1.0e-20) {
127 SurfaceEnergy = 2.5*G4Pow::GetInstance()->Z23(theA)
128 *(G4StatMFParameters::Beta(T) - T*q - G4StatMFParameters::GetBeta0());
129 }
130 return BulkEnergy + SurfaceEnergy;
131 }
132