| Geant4 Cross Reference |
1 // 1
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17 // *
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24 // *******************************************
25 //
26 //
27 // -------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4hICRU49p
33 //
34 // Author: V.Ivanchenko (Vladimir.Ivanc
35 //
36 // Creation date: 20 July 2000
37 //
38 // Modifications:
39 // 20/07/2000 V.Ivanchenko First implementati
40 // 18/09/2000 V.Ivanchenko clean up - all var
41 // 03/10/2000 V.Ivanchenko clean up accoding
42 // 10/05/2001 V.Ivanchenko Clean up againist
43 //
44 // Class Description:
45 //
46 // Electronic stopping power parametrised acco
47 // ICRU Report N49, 1993, for protons.
48 //
49 // Class Description: End
50 //
51 // -------------------------------------------
52 //
53 //....oooOO0OOooo........oooOO0OOooo........oo
54
55 #include "G4hICRU49p.hh"
56
57 #include "globals.hh"
58 #include "G4SystemOfUnits.hh"
59 #include "G4UnitsTable.hh"
60 #include "G4Material.hh"
61
62 //....oooOO0OOooo........oooOO0OOooo........oo
63
64 G4hICRU49p::G4hICRU49p():
65 G4VhElectronicStoppingPower(),
66 protonMassAMU(1.007276),
67 iMolecula(0)
68 {;}
69
70 //....oooOO0OOooo........oooOO0OOooo........oo
71
72 G4hICRU49p::~G4hICRU49p()
73 {;}
74
75 //....oooOO0OOooo........oooOO0OOooo........oo
76
77 G4bool G4hICRU49p::HasMaterial(const G4Materia
78 {
79 G4String chFormula = material->GetChemicalFo
80 G4String myFormula = G4String(" ") ;
81
82 if (myFormula == chFormula ) {
83 if(1 == (material->GetNumberOfElements()))
84 return false ;
85 }
86
87 // ICRU Report N49, 1993. Power's model for
88 const G4int numberOfMolecula = 11 ;
89 static const G4String name[numberOfMolecula]
90 "Al_2O_3", "CO_2",
91 "(C_2H_4)_N-Polyethylene", "(C_2H_4)_N-Pol
92 "C_3H_8", "SiO_2",
93 "H_2O-Gas", "Graphite"};
94
95 // Special treatment for water in gas state
96 const G4State theState = material->GetState(
97
98 myFormula = G4String("H_2O");
99 if( theState == kStateGas && myFormula == ch
100 chFormula = G4String("H_2O-Gas");
101 }
102
103 // Search for the material in the table
104 for (G4int i=0; i<numberOfMolecula; ++i) {
105 if (chFormula == name[i]) {
106 SetMoleculaNumber(i) ;
107 return true ;
108 }
109 }
110 return false ;
111 }
112
113 //....oooOO0OOooo........oooOO0OOooo........oo
114
115 G4double G4hICRU49p::StoppingPower(const G4Mat
116 G4dou
117 {
118 G4double ionloss = 0.0 ;
119
120 // pure material (normally not the case for
121 if(1 == (material->GetNumberOfElements())) {
122 G4double z = material->GetZ() ;
123 ionloss = ElectronicStoppingPower( z, kine
124
125 } else if (iMolecula < 11) {
126
127 // The data and the fit from:
128 // ICRU Report N49, 1993. Ziegler's model
129 // Proton kinetic energy for parametrisati
130
131 G4double T = kineticEnergy/(keV*protonMass
132
133 static const G4double a[11][5] = {
134 {1.187E+1, 1.343E+1, 1.069E+4, 7.723E+2, 2.
135 {7.802E+0, 8.814E+0, 8.303E+3, 7.446E+2, 7.
136 {7.294E+0, 8.284E+0, 5.010E+3, 4.544E+2, 8.
137 {8.646E+0, 9.800E+0, 7.066E+3, 4.581E+2, 9.
138 {1.286E+1, 1.462E+1, 5.625E+3, 2.621E+3, 3.
139 {3.229E+1, 3.696E+1, 8.918E+3, 3.244E+3, 1.
140 {1.604E+1, 1.825E+1, 6.967E+3, 2.307E+3, 3.
141 {8.049E+0, 9.099E+0, 9.257E+3, 3.846E+2, 1.
142 {4.015E+0, 4.542E+0, 3.955E+3, 4.847E+2, 7.
143 {4.571E+0, 5.173E+0, 4.346E+3, 4.779E+2, 8.
144 {2.631E+0, 2.601E+0, 1.701E+3, 1.279E+3, 1.
145
146
147 if ( T < 10.0 ) {
148 ionloss = a[iMolecula][0] * std::sqrt(T)
149
150 } else if ( T < 10000.0 ) {
151 G4double slow = a[iMolecula][1] * std::
152 G4double shigh = std::log( 1.0 + a[iMole
153 + a[iMolecula][4]*T ) * a
154 ionloss = slow*shigh / (slow + shigh) ;
155 }
156
157 if ( ionloss < 0.0) ionloss = 0.0 ;
158 /////////////////////////////////////////
159 // Graphite may be implemented in a very a
160 // amorphous results according to rough fi
161 // 1-100 keV: *(1+0.023+0.0066*std::log10(
162 // 100-700 keV: *(1+0.089-0.0248*std::log1
163 // 700-10000 keV: *(1+0.089-0.0248*std::lo
164 // continuity is (should!) be garanteed, b
165 // first derivative. A better fit is in or
166 if ( 10 == iMolecula ) {
167 if (T < 100.0) {
168 ionloss *= (1.0+0.023+0.0066*std::log10(T));
169 }
170 else if (T < 700.0) {
171 ionloss *=(1.0+0.089-0.0248*std::log10(T-99.
172 }
173 else if (T < 10000.0) {
174 ionloss *=(1.0+0.089-0.0248*std::log10(700.-
175 }
176 }
177 }
178
179 return ionloss;
180 }
181
182 //....oooOO0OOooo........oooOO0OOooo........oo
183
184 G4double G4hICRU49p::ElectronicStoppingPower(G
185 G
186 {
187 G4double ionloss ;
188 G4int i = G4int(z)-1 ; // index of atom
189 if(i < 0) i = 0 ;
190 if(i > 91) i = 91 ;
191
192 // The data and the fit from:
193 // ICRU Report 49, 1993. Ziegler's type of p
194 // Proton kinetic energy for parametrisation
195
196 G4double T = kineticEnergy/(keV*protonMassAM
197
198 static const G4double a[92][5] = {
199 {1.254E+0, 1.440E+0, 2.426E+2, 1.200E+4, 1.
200 {1.229E+0, 1.397E+0, 4.845E+2, 5.873E+3, 5.
201 {1.411E+0, 1.600E+0, 7.256E+2, 3.013E+3, 4.
202 {2.248E+0, 2.590E+0, 9.660E+2, 1.538E+2, 3.
203 {2.474E+0, 2.815E+0, 1.206E+3, 1.060E+3, 2.
204 {2.631E+0, 2.601E+0, 1.701E+3, 1.279E+3, 1.
205 {2.954E+0, 3.350E+0, 1.683E+3, 1.900E+3, 2.
206 {2.652E+0, 3.000E+0, 1.920E+3, 2.000E+3, 2.
207 {2.085E+0, 2.352E+0, 2.157E+3, 2.634E+3, 1.
208 {1.951E+0, 2.199E+0, 2.393E+3, 2.699E+3, 1.
209 {2.542E+0, 2.869E+0, 2.628E+3, 1.854E+3, 1.
210 {3.791E+0, 4.293E+0, 2.862E+3, 1.009E+3, 1.
211 {4.154E+0, 4.739E+0, 2.766E+3, 1.645E+2, 2.
212 {4.914E+0, 5.598E+0, 3.193E+3, 2.327E+2, 1.
213 {3.232E+0, 3.647E+0, 3.561E+3, 1.560E+3, 1.
214 {3.447E+0, 3.891E+0, 3.792E+3, 1.219E+3, 1.
215 {5.301E+0, 6.008E+0, 3.969E+3, 6.451E+2, 1.
216 {5.731E+0, 6.500E+0, 4.253E+3, 5.300E+2, 1.
217 {5.152E+0, 5.833E+0, 4.482E+3, 5.457E+2, 1.
218 {5.521E+0, 6.252E+0, 4.710E+3, 5.533E+2, 1.
219 {5.201E+0, 5.884E+0, 4.938E+3, 5.609E+2, 9.
220 {4.858E+0, 5.489E+0, 5.260E+3, 6.511E+2, 8.
221 {4.479E+0, 5.055E+0, 5.391E+3, 9.523E+2, 9.
222 {3.983E+0, 4.489E+0, 5.616E+3, 1.336E+3, 8.
223 {3.469E+0, 3.907E+0, 5.725E+3, 1.461E+3, 8.
224 {3.519E+0, 3.963E+0, 6.065E+3, 1.243E+3, 7.
225 {3.140E+0, 3.535E+0, 6.288E+3, 1.372E+3, 7.
226 {3.553E+0, 4.004E+0, 6.205E+3, 5.551E+2, 8.
227 {3.696E+0, 4.194E+0, 4.649E+3, 8.113E+1, 2.
228 {4.210E+0, 4.750E+0, 6.953E+3, 2.952E+2, 6.
229 {5.041E+0, 5.697E+0, 7.173E+3, 2.026E+2, 6.
230 {5.554E+0, 6.300E+0, 6.496E+3, 1.100E+2, 9.
231 {5.323E+0, 6.012E+0, 7.611E+3, 2.925E+2, 6.
232 {5.874E+0, 6.656E+0, 7.395E+3, 1.175E+2, 7.
233 {6.658E+0, 7.536E+0, 7.694E+3, 2.223E+2, 6.
234 {6.413E+0, 7.240E+0, 1.185E+4, 1.537E+2, 2.
235 {5.694E+0, 6.429E+0, 8.478E+3, 2.929E+2, 6.
236 {6.339E+0, 7.159E+0, 8.693E+3, 3.303E+2, 6.
237 {6.407E+0, 7.234E+0, 8.907E+3, 3.678E+2, 5.
238 {6.734E+0, 7.603E+0, 9.120E+3, 4.052E+2, 5.
239 {6.901E+0, 7.791E+0, 9.333E+3, 4.427E+2, 5.
240 {6.424E+0, 7.248E+0, 9.545E+3, 4.802E+2, 5.
241 {6.799E+0, 7.671E+0, 9.756E+3, 5.176E+2, 5.
242 {6.109E+0, 6.887E+0, 9.966E+3, 5.551E+2, 5.
243 {5.924E+0, 6.677E+0, 1.018E+4, 5.925E+2, 4.
244 {5.238E+0, 5.900E+0, 1.038E+4, 6.300E+2, 4.
245 {5.345E+0, 6.038E+0, 6.790E+3, 3.978E+2, 1.
246 {5.814E+0, 6.554E+0, 1.080E+4, 3.555E+2, 4.
247 {6.229E+0, 7.024E+0, 1.101E+4, 3.709E+2, 4.
248 {6.409E+0, 7.227E+0, 1.121E+4, 3.864E+2, 4.
249 {7.500E+0, 8.480E+0, 8.608E+3, 3.480E+2, 9.
250 {6.979E+0, 7.871E+0, 1.162E+4, 3.924E+2, 4.
251 {7.725E+0, 8.716E+0, 1.183E+4, 3.948E+2, 4.
252 {8.337E+0, 9.425E+0, 1.051E+4, 2.696E+2, 6.
253 {7.287E+0, 8.218E+0, 1.223E+4, 3.997E+2, 4.
254 {7.899E+0, 8.911E+0, 1.243E+4, 4.021E+2, 4.
255 {8.041E+0, 9.071E+0, 1.263E+4, 4.045E+2, 4.
256 {7.488E+0, 8.444E+0, 1.283E+4, 4.069E+2, 4.
257 {7.291E+0, 8.219E+0, 1.303E+4, 4.093E+2, 4.
258 {7.098E+0, 8.000E+0, 1.323E+4, 4.118E+2, 4.
259 {6.909E+0, 7.786E+0, 1.343E+4, 4.142E+2, 4.
260 {6.728E+0, 7.580E+0, 1.362E+4, 4.166E+2, 3.
261 {6.551E+0, 7.380E+0, 1.382E+4, 4.190E+2, 3.
262 {6.739E+0, 7.592E+0, 1.402E+4, 4.214E+2, 3.
263 {6.212E+0, 6.996E+0, 1.421E+4, 4.239E+2, 3.
264 {5.517E+0, 6.210E+0, 1.440E+4, 4.263E+2, 3.
265 {5.220E+0, 5.874E+0, 1.460E+4, 4.287E+2, 3.
266 {5.071E+0, 5.706E+0, 1.479E+4, 4.330E+2, 3.
267 {4.926E+0, 5.542E+0, 1.498E+4, 4.335E+2, 3.
268 {4.788E+0, 5.386E+0, 1.517E+4, 4.359E+2, 3.
269 {4.893E+0, 5.505E+0, 1.536E+4, 4.384E+2, 3.
270 {5.028E+0, 5.657E+0, 1.555E+4, 4.408E+2, 3.
271 {4.738E+0, 5.329E+0, 1.574E+4, 4.432E+2, 3.
272 {4.587E+0, 5.160E+0, 1.541E+4, 4.153E+2, 3.
273 {5.201E+0, 5.851E+0, 1.612E+4, 4.416E+2, 3.
274 {5.071E+0, 5.704E+0, 1.630E+4, 4.409E+2, 3.
275 {4.946E+0, 5.563E+0, 1.649E+4, 4.401E+2, 2.
276 {4.477E+0, 5.034E+0, 1.667E+4, 4.393E+2, 2.
277 {4.844E+0, 5.458E+0, 7.852E+3, 9.758E+2, 2.
278 {4.307E+0, 4.843E+0, 1.704E+4, 4.878E+2, 2.
279 {4.723E+0, 5.311E+0, 1.722E+4, 5.370E+2, 2.
280 {5.319E+0, 5.982E+0, 1.740E+4, 5.863E+2, 2.
281 {5.956E+0, 6.700E+0, 1.780E+4, 6.770E+2, 2.
282 {6.158E+0, 6.928E+0, 1.777E+4, 5.863E+2, 2.
283 {6.203E+0, 6.979E+0, 1.795E+4, 5.863E+2, 2.
284 {6.181E+0, 6.954E+0, 1.812E+4, 5.863E+2, 2.
285 {6.949E+0, 7.820E+0, 1.830E+4, 5.863E+2, 2.
286 {7.506E+0, 8.448E+0, 1.848E+4, 5.863E+2, 2.
287 {7.648E+0, 8.609E+0, 1.866E+4, 5.863E+2, 2.
288 {7.711E+0, 8.679E+0, 1.883E+4, 5.863E+2, 2.
289 {7.407E+0, 8.336E+0, 1.901E+4, 5.863E+2, 2.
290 {7.290E+0, 8.204E+0, 1.918E+4, 5.863E+2, 2.
291 };
292
293 G4double fac = 1.0 ;
294
295 // Carbon specific case for E < 40 keV
296 if ( T < 40.0 && 5 == i) {
297 fac = std::sqrt(T/40.0) ;
298 T = 40.0 ;
299
300 // Free electron gas model
301 } else if ( T < 10.0 ) {
302 fac = std::sqrt(T*0.1) ;
303 T =10.0 ;
304 }
305
306 // Main parametrisation
307 G4double slow = a[i][1] * std::pow(T, 0.45)
308 G4double shigh = std::log( 1.0 + a[i][3]/T +
309 ionloss = slow*shigh*fac / (slow + shigh) ;
310
311 if ( ionloss < 0.0) ionloss = 0.0 ;
312
313 return ionloss;
314 }
315
316
317
318