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25 //
26 //
27 //
28 // Hadronic Process: Nuclear De-excitations
29 // by V. Lara
30
31 #include "G4StatMFMicroManager.hh"
32 #include "G4HadronicException.hh"
33
34 // Copy constructor
35 G4StatMFMicroManager::G4StatMFMicroManager(const G4StatMFMicroManager & )
36 {
37 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMicroManager::copy_constructor meant to not be accessible");
38 }
39
40 // Operators
41
42 G4StatMFMicroManager & G4StatMFMicroManager::
43 operator=(const G4StatMFMicroManager & )
44 {
45 throw G4HadronicException(__FILE__, __LINE__, "G4StatMFMicroManager::operator= meant to not be accessible");
46 return *this;
47 }
48
49
50 G4bool G4StatMFMicroManager::operator==(const G4StatMFMicroManager & ) const
51 {
52 return false;
53 }
54
55
56 G4bool G4StatMFMicroManager::operator!=(const G4StatMFMicroManager & ) const
57 {
58 return true;
59 }
60
61 // constructor
62 G4StatMFMicroManager::G4StatMFMicroManager(const G4Fragment & theFragment,
63 G4int multiplicity,
64 G4double FreeIntE, G4double SCompNuc) :
65 _Normalization(0.0)
66 {
67 // Perform class initialization
68 Initialize(theFragment,multiplicity,FreeIntE,SCompNuc);
69 }
70
71 // destructor
72 G4StatMFMicroManager::~G4StatMFMicroManager()
73 {
74 if (!_Partition.empty())
75 {
76 std::for_each(_Partition.begin(),_Partition.end(),
77 DeleteFragment());
78 }
79 }
80
81 void G4StatMFMicroManager::Initialize(const G4Fragment & theFragment, G4int im,
82 G4double FreeIntE, G4double SCompNuc)
83 {
84 G4int i;
85
86 G4double U = theFragment.GetExcitationEnergy();
87
88 G4int A = theFragment.GetA_asInt();
89 G4int Z = theFragment.GetZ_asInt();
90
91 // Statistical weights
92 _WW = 0.0;
93
94 // Mean breakup multiplicity
95 _MeanMultiplicity = 0.0;
96
97 // Mean channel temperature
98 _MeanTemperature = 0.0;
99
100 // Mean channel entropy
101 _MeanEntropy = 0.0;
102
103 // Keep fragment atomic numbers
104 // G4int * FragmentAtomicNumbers = new G4int(static_cast<G4int>(A+0.5));
105 // G4int * FragmentAtomicNumbers = new G4int(m);
106 G4int FragmentAtomicNumbers[4];
107
108 // We distribute A nucleons between m fragments mantaining the order
109 // FragmentAtomicNumbers[m-1]>FragmentAtomicNumbers[m-2]>...>FragmentAtomicNumbers[0]
110 // Our initial distribution is
111 // FragmentAtomicNumbers[m-1]=A, FragmentAtomicNumbers[m-2]=0, ..., FragmentAtomicNumbers[0]=0
112 FragmentAtomicNumbers[im-1] = A;
113 for (i = 0; i < (im - 1); i++) FragmentAtomicNumbers[i] = 0;
114
115 // We try to distribute A nucleons in partitions of m fragments
116 // MakePartition return true if it is possible
117 // and false if it is not
118
119 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
120 while (MakePartition(im,FragmentAtomicNumbers)) {
121 // Allowed partitions are stored and its probability calculated
122
123 G4StatMFMicroPartition * aPartition = new G4StatMFMicroPartition(A,Z);
124 G4double PartitionProbability = 0.0;
125
126 for (i = im-1; i >= 0; i--) aPartition->SetPartitionFragment(FragmentAtomicNumbers[i]);
127 PartitionProbability = aPartition->CalcPartitionProbability(U,FreeIntE,SCompNuc);
128 _Partition.push_back(aPartition);
129
130 _WW += PartitionProbability;
131 _MeanMultiplicity += im*PartitionProbability;
132 _MeanTemperature += aPartition->GetTemperature() * PartitionProbability;
133 if (PartitionProbability > 0.0)
134 _MeanEntropy += PartitionProbability * aPartition->GetEntropy();
135 }
136 }
137
138 G4bool G4StatMFMicroManager::MakePartition(G4int k, G4int * ANumbers)
139 // Distributes A nucleons between k fragments
140 // mantaining the order ANumbers[k-1] > ANumbers[k-2] > ... > ANumbers[0]
141 // If it is possible returns true. In other case returns false
142 {
143 G4int l = 1;
144 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
145 while (l < k) {
146 G4int tmp = ANumbers[l-1] + ANumbers[k-1];
147 ANumbers[l-1] += 1;
148 ANumbers[k-1] -= 1;
149 if (ANumbers[l-1] > ANumbers[l] || ANumbers[k-2] > ANumbers[k-1]) {
150 ANumbers[l-1] = 1;
151 ANumbers[k-1] = tmp - 1;
152 l++;
153 } else return true;
154 }
155 return false;
156 }
157
158 void G4StatMFMicroManager::Normalize(G4double Norm)
159 {
160 _Normalization = Norm;
161 _WW /= Norm;
162 _MeanMultiplicity /= Norm;
163 _MeanTemperature /= Norm;
164 _MeanEntropy /= Norm;
165
166 return;
167 }
168
169 G4StatMFChannel*
170 G4StatMFMicroManager::ChooseChannel(G4int A0, G4int Z0, G4double MeanT)
171 {
172 G4double RandNumber = _Normalization * _WW * G4UniformRand();
173 G4double AccumWeight = 0.0;
174
175 for (std::vector<G4StatMFMicroPartition*>::iterator i = _Partition.begin();
176 i != _Partition.end(); ++i)
177 {
178 AccumWeight += (*i)->GetProbability();
179 if (RandNumber < AccumWeight)
180 return (*i)->ChooseZ(A0,Z0,MeanT);
181 }
182
183 throw G4HadronicException(__FILE__, __LINE__,
184 "G4StatMFMicroCanonical::ChooseChannel: Couldn't find a channel.");
185 return 0;
186 }
187