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 | // * * |
---|
21 | // * Parts of this code which have been developed by QinetiQ Ltd * |
---|
22 | // * under contract to the European Space Agency (ESA) are the * |
---|
23 | // * intellectual property of ESA. Rights to use, copy, modify and * |
---|
24 | // * redistribute this software for general public use are granted * |
---|
25 | // * in compliance with any licensing, distribution and development * |
---|
26 | // * policy adopted by the Geant4 Collaboration. This code has been * |
---|
27 | // * written by QinetiQ Ltd for the European Space Agency, under ESA * |
---|
28 | // * contract 17191/03/NL/LvH (Aurora Programme). * |
---|
29 | // * * |
---|
30 | // * By using, copying, modifying or distributing the software (or * |
---|
31 | // * any work based on the software) you agree to acknowledge its * |
---|
32 | // * use in resulting scientific publications, and indicate your * |
---|
33 | // * acceptance of all terms of the Geant4 Software license. * |
---|
34 | // ******************************************************************** |
---|
35 | // |
---|
36 | // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
---|
37 | // |
---|
38 | // MODULE: G4NuclearAbrasionGeometry.cc |
---|
39 | // |
---|
40 | // Version: B.1 |
---|
41 | // Date: 15/04/04 |
---|
42 | // Author: P R Truscott |
---|
43 | // Organisation: QinetiQ Ltd, UK |
---|
44 | // Customer: ESA/ESTEC, NOORDWIJK |
---|
45 | // Contract: 17191/03/NL/LvH |
---|
46 | // |
---|
47 | // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
---|
48 | // |
---|
49 | // CHANGE HISTORY |
---|
50 | // -------------- |
---|
51 | // |
---|
52 | // 18 November 2003, P R Truscott, QinetiQ Ltd, UK |
---|
53 | // Created. |
---|
54 | // |
---|
55 | // 15 March 2004, P R Truscott, QinetiQ Ltd, UK |
---|
56 | // Beta release |
---|
57 | // |
---|
58 | // 4 June 2004, J.P. Wellisch, CERN, Switzerland |
---|
59 | // resolving technical portability issues. |
---|
60 | // |
---|
61 | // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
---|
62 | //////////////////////////////////////////////////////////////////////////////// |
---|
63 | // |
---|
64 | #include "G4NuclearAbrasionGeometry.hh" |
---|
65 | #include "G4WilsonRadius.hh" |
---|
66 | //////////////////////////////////////////////////////////////////////////////// |
---|
67 | // |
---|
68 | G4NuclearAbrasionGeometry::G4NuclearAbrasionGeometry (G4double AP1, |
---|
69 | G4double AT1, G4double r1) |
---|
70 | { |
---|
71 | // |
---|
72 | // |
---|
73 | // Initialise variables for interaction geometry. |
---|
74 | // |
---|
75 | G4WilsonRadius aR; |
---|
76 | AP = AP1; |
---|
77 | AT = AT1; |
---|
78 | rP = aR.GetWilsonRadius(AP); |
---|
79 | rT = aR.GetWilsonRadius(AT); |
---|
80 | r = r1; |
---|
81 | n = rP / (rP + rT); |
---|
82 | b = r / (rP + rT); |
---|
83 | m = rT / rP; |
---|
84 | Q = (1.0 - b)/n; |
---|
85 | S = Q * Q; |
---|
86 | T = S * Q; |
---|
87 | R = std::sqrt(m*n); |
---|
88 | U = 1.0/m - 2.0; |
---|
89 | // |
---|
90 | // |
---|
91 | // Initialise the threshold radius-ratio at which interactions are considered |
---|
92 | // peripheral or central. |
---|
93 | // |
---|
94 | rth = 2.0/3.0; |
---|
95 | B = 10.0 * MeV; |
---|
96 | } |
---|
97 | //////////////////////////////////////////////////////////////////////////////// |
---|
98 | // |
---|
99 | G4NuclearAbrasionGeometry::~G4NuclearAbrasionGeometry () |
---|
100 | {;} |
---|
101 | //////////////////////////////////////////////////////////////////////////////// |
---|
102 | // |
---|
103 | void G4NuclearAbrasionGeometry::SetPeripheralThreshold (G4double rth1) |
---|
104 | {if (rth1 > 0.0 && rth1 <= 1.0) rth = rth1;} |
---|
105 | //////////////////////////////////////////////////////////////////////////////// |
---|
106 | // |
---|
107 | G4double G4NuclearAbrasionGeometry::GetPeripheralThreshold () |
---|
108 | {return rth;} |
---|
109 | //////////////////////////////////////////////////////////////////////////////// |
---|
110 | // |
---|
111 | G4double G4NuclearAbrasionGeometry::P () |
---|
112 | { |
---|
113 | // |
---|
114 | // |
---|
115 | // Initialise the value for P, then determine the actual value depending upon |
---|
116 | // whether the projectile is larger or smaller than the target and these radii |
---|
117 | // in relation to the impact parameter. |
---|
118 | // |
---|
119 | G4double P = 0.0; |
---|
120 | |
---|
121 | if (rT > rP) |
---|
122 | { |
---|
123 | if (rT-rP<=r && r<=rT+rP) P = 0.125*R*U*S - 0.125*(0.5*R*U+1.0)*T; |
---|
124 | else P = -1.0; |
---|
125 | } |
---|
126 | else |
---|
127 | { |
---|
128 | if (rP-rT<=r && r<=rP+rT) P = 0.125*R*U*S - 0.125*(0.5*std::sqrt(n/m)*U- |
---|
129 | (std::sqrt(1.0-m*m)/n - 1.0)*std::sqrt((2.0-m)/std::pow(m,5.0)))*T; |
---|
130 | else P = (std::sqrt(1.0-m*m)/n-1.0)*std::sqrt(1.0-b*b/n/n); |
---|
131 | } |
---|
132 | |
---|
133 | if (!(P <= 1.0 && P>= -1.0)) |
---|
134 | { |
---|
135 | if (P > 1.0) P = 1.0; |
---|
136 | else P = -1.0; |
---|
137 | } |
---|
138 | return P; |
---|
139 | } |
---|
140 | //////////////////////////////////////////////////////////////////////////////// |
---|
141 | // |
---|
142 | G4double G4NuclearAbrasionGeometry::F () |
---|
143 | { |
---|
144 | // |
---|
145 | // |
---|
146 | // Initialise the value for F, then determine the actual value depending upon |
---|
147 | // whether the projectile is larger or smaller than the target and these radii |
---|
148 | // in relation to the impact parameter. |
---|
149 | // |
---|
150 | G4double F = 0.0; |
---|
151 | |
---|
152 | if (rT > rP) |
---|
153 | { |
---|
154 | if (rT-rP<=r && r<=rT+rP) F = 0.75*R*S - 0.125*(3.0*R-1.0)*T; |
---|
155 | else F = 1.0; |
---|
156 | } |
---|
157 | else |
---|
158 | { |
---|
159 | if (rP-rT<=r && r<=rP+rT) F = 0.75*R*S - 0.125*(3.0*std::sqrt(n/m)- |
---|
160 | (1.0-std::pow(1.0-m*m,3.0/2.0))*std::sqrt(1.0-std::pow(1.0-m,2.0))/std::pow(m,3.0))*T; |
---|
161 | else F = (1.0-std::pow(1.0-m*m,3.0/2.0))*std::sqrt(1.0-b*b/n/n); |
---|
162 | } |
---|
163 | |
---|
164 | if (!(F <= 1.0 && F>= 0.0)) |
---|
165 | { |
---|
166 | if (F > 1.0) F = 1.0; |
---|
167 | else F = 0.0; |
---|
168 | } |
---|
169 | return F; |
---|
170 | } |
---|
171 | //////////////////////////////////////////////////////////////////////////////// |
---|
172 | // |
---|
173 | G4double G4NuclearAbrasionGeometry::GetExcitationEnergyOfProjectile () |
---|
174 | { |
---|
175 | G4double F1 = F(); |
---|
176 | G4double P1 = P(); |
---|
177 | G4double Es = 0.0; |
---|
178 | |
---|
179 | Es = 0.95 * MeV * 4.0 * pi * rP*rP/fermi/fermi * |
---|
180 | (1.0+P1-std::pow(1.0-F1,2.0/3.0)); |
---|
181 | // if (rT < rP && r < rP-rT) |
---|
182 | if ((r-rP)/rT < rth) |
---|
183 | { |
---|
184 | G4double omega = 0.0; |
---|
185 | if (AP < 12.0) omega = 1500.0; |
---|
186 | else if (AP <= 16.0) omega = 1500.0 - 320.0*(AP-12.0); |
---|
187 | Es *= 1.0 + F1*(5.0+omega*F1*F1); |
---|
188 | } |
---|
189 | |
---|
190 | if (Es < 0.0) |
---|
191 | Es = 0.0; |
---|
192 | else if (Es > B * AP) |
---|
193 | Es = B * AP; |
---|
194 | return Es; |
---|
195 | } |
---|
196 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
197 | // |
---|
198 | G4double G4NuclearAbrasionGeometry::GetExcitationEnergyOfTarget () |
---|
199 | { |
---|
200 | // |
---|
201 | // |
---|
202 | // This member function declares a new G4NuclearAbrasionGeometry object but with the |
---|
203 | // projectile and target exchanged to determine the values for F and P. Determination |
---|
204 | // of the excess surface area and excitation energy is as above. |
---|
205 | // |
---|
206 | G4NuclearAbrasionGeometry *revAbrasionGeometry = |
---|
207 | new G4NuclearAbrasionGeometry(AT, AP, r); |
---|
208 | G4double F1 = revAbrasionGeometry->F(); |
---|
209 | G4double P1 = revAbrasionGeometry->P(); |
---|
210 | G4double Es = 0.0; |
---|
211 | |
---|
212 | Es = 0.95 * MeV * 4.0 * pi * rT*rT/fermi/fermi * |
---|
213 | (1.0+P1-std::pow(1.0-F1,2.0/3.0)); |
---|
214 | // if (rP < rT && r < rT-rP) |
---|
215 | if ((r-rT)/rP < rth) |
---|
216 | { |
---|
217 | G4double omega = 0.0; |
---|
218 | if (AT < 12.0) omega = 1500.0; |
---|
219 | else if (AT <= 16.0) omega = 1500.0 - 320.0*(AT-12.0); |
---|
220 | Es *= 1.0 + F1*(5.0+omega*F1*F1); |
---|
221 | } |
---|
222 | |
---|
223 | if (Es < 0.0) |
---|
224 | Es = 0.0; |
---|
225 | else if (Es > B * AT) |
---|
226 | Es = B * AT; |
---|
227 | return Es; |
---|
228 | } |
---|
229 | //////////////////////////////////////////////////////////////////////////////// |
---|
230 | // |
---|