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G4hICRU49Nuclear.cc
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27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4hICRU49Nuclear
33 //
34 // Author: V.Ivanchenko (Vladimir.Ivanchenko@cern.ch)
35 //
36 // Creation date: 20 July 2000
37 //
38 // Modifications:
39 // 20/07/2000 V.Ivanchenko First implementation
40 // 10/05/2001 V.Ivanchenko Clean up againist Linux compilation with -Wall
41 //
42 // Class Description:
43 //
44 // Nuclear stopping power parametrised according to
45 // ICRU Report N49, 1993. Moliere model.
46 // G.Moliere "Theorie der Streuung schneller geladener Teilchen I;
47 // Einzelstreuungam abbgeschirmten Coulomb-Feld" Z. f. Naturforsch, A2,
48 // 133 (1947).
49 //
50 // Class Description: End
51 //
52 // -------------------------------------------------------------------
53 //
54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
55 
56 #include "G4hICRU49Nuclear.hh"
57 
58 #include "globals.hh"
59 #include "G4SystemOfUnits.hh"
60 #include "G4UnitsTable.hh"
61 #include "Randomize.hh"
62 
63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
64 
66 {;}
67 
68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
69 
71 {;}
72 
73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
74 
76  G4double z1, G4double z2,
77  G4double m1, G4double m2Local) const
78 {
79  G4double energy = kineticEnergy/keV ; // energy in keV
80  G4double ionloss = 0.0;
81 
82  G4double rm = (m1 + m2Local) * ( std::pow(z1, .23) + std::pow(z2, .23) ) ;
83 
84  G4double er = 32.536 * m2Local * energy / ( z1 * z2 * rm ) ; // reduced energy
85 
86  static G4double a[104][2] = {
87  { 1.0E+8, 5.831E-8},
88  { 8.0E+7, 7.288E-8},
89  { 6.0E+7, 9.719E-8},
90  { 5.0E+7, 1.166E-7},
91  { 4.0E+7, 1.457E-7},
92  { 3.0E+7, 1.942E-7},
93  { 2.0E+7, 2.916E-7},
94  { 1.5E+7, 3.887E-7},
95 
96  { 1.0E+7, 5.833E-7},
97  { 8.0E+6, 7.287E-7},
98  { 6.0E+6, 9.712E-7},
99  { 5.0E+6, 1.166E-6},
100  { 4.0E+6, 1.457E-6},
101  { 3.0E+6, 1.941E-6},
102  { 2.0E+6, 2.911E-6},
103  { 1.5E+6, 3.878E-6},
104 
105  { 1.0E+6, 5.810E-6},
106  { 8.0E+5, 7.262E-6},
107  { 6.0E+5, 9.663E-6},
108  { 5.0E+5, 1.157E-5},
109  { 4.0E+5, 1.442E-5},
110  { 3.0E+5, 1.913E-5},
111  { 2.0E+5, 2.845E-5},
112  { 1.5E+5, 3.762E-5},
113 
114  { 1.0E+5, 5.554E-5},
115  { 8.0E+4, 6.866E-5},
116  { 6.0E+4, 9.020E-5},
117  { 5.0E+4, 1.070E-4},
118  { 4.0E+4, 1.319E-4},
119  { 3.0E+4, 1.722E-4},
120  { 2.0E+4, 2.499E-4},
121  { 1.5E+4, 3.248E-4},
122 
123  { 1.0E+4, 4.688E-4},
124  { 8.0E+3, 5.729E-4},
125  { 6.0E+3, 7.411E-4},
126  { 5.0E+3, 8.718E-4},
127  { 4.0E+3, 1.063E-3},
128  { 3.0E+3, 1.370E-3},
129  { 2.0E+3, 1.955E-3},
130  { 1.5E+3, 2.511E-3},
131 
132  { 1.0E+3, 3.563E-3},
133  { 8.0E+2, 4.314E-3},
134  { 6.0E+2, 5.511E-3},
135  { 5.0E+2, 6.430E-3},
136  { 4.0E+2, 7.756E-3},
137  { 3.0E+2, 9.855E-3},
138  { 2.0E+2, 1.375E-2},
139  { 1.5E+2, 1.736E-2},
140 
141  { 1.0E+2, 2.395E-2},
142  { 8.0E+1, 2.850E-2},
143  { 6.0E+1, 3.552E-2},
144  { 5.0E+1, 4.073E-2},
145  { 4.0E+1, 4.802E-2},
146  { 3.0E+1, 5.904E-2},
147  { 1.5E+1, 9.426E-2},
148 
149  { 1.0E+1, 1.210E-1},
150  { 8.0E+0, 1.377E-1},
151  { 6.0E+0, 1.611E-1},
152  { 5.0E+0, 1.768E-1},
153  { 4.0E+0, 1.968E-1},
154  { 3.0E+0, 2.235E-1},
155  { 2.0E+0, 2.613E-1},
156  { 1.5E+0, 2.871E-1},
157 
158  { 1.0E+0, 3.199E-1},
159  { 8.0E-1, 3.354E-1},
160  { 6.0E-1, 3.523E-1},
161  { 5.0E-1, 3.609E-1},
162  { 4.0E-1, 3.693E-1},
163  { 3.0E-1, 3.766E-1},
164  { 2.0E-1, 3.803E-1},
165  { 1.5E-1, 3.788E-1},
166 
167  { 1.0E-1, 3.711E-1},
168  { 8.0E-2, 3.644E-1},
169  { 6.0E-2, 3.530E-1},
170  { 5.0E-2, 3.444E-1},
171  { 4.0E-2, 3.323E-1},
172  { 3.0E-2, 3.144E-1},
173  { 2.0E-2, 2.854E-1},
174  { 1.5E-2, 2.629E-1},
175 
176  { 1.0E-2, 2.298E-1},
177  { 8.0E-3, 2.115E-1},
178  { 6.0E-3, 1.883E-1},
179  { 5.0E-3, 1.741E-1},
180  { 4.0E-3, 1.574E-1},
181  { 3.0E-3, 1.372E-1},
182  { 2.0E-3, 1.116E-1},
183  { 1.5E-3, 9.559E-2},
184 
185  { 1.0E-3, 7.601E-2},
186  { 8.0E-4, 6.668E-2},
187  { 6.0E-4, 5.605E-2},
188  { 5.0E-4, 5.008E-2},
189  { 4.0E-4, 4.352E-2},
190  { 3.0E-4, 3.617E-2},
191  { 2.0E-4, 2.768E-2},
192  { 1.5E-4, 2.279E-2},
193 
194  { 1.0E-4, 1.723E-2},
195  { 8.0E-5, 1.473E-2},
196  { 6.0E-5, 1.200E-2},
197  { 5.0E-5, 1.052E-2},
198  { 4.0E-5, 8.950E-3},
199  { 3.0E-5, 7.246E-3},
200  { 2.0E-5, 5.358E-3},
201  { 1.5E-5, 4.313E-3},
202  { 0.0, 3.166E-3}
203  };
204 
205  for (G4int i=1; i<104; i++)
206  {
207  if (er > a[i][0]) {
208  ionloss =
209  (a[i][1]-a[i-1][1])*(er-a[i-1][0])/(a[i][0]-a[i-1][0])+a[i-1][1];
210  break;
211  }
212  }
213 
214  // Stragling
215  if(lossFlucFlag) {
216  G4double sig = 4.0 * m1 * m2Local / ((m1 + m2Local)*(m1 + m2Local)*
217  (4.0 + 0.197*std::pow(er,-1.6991)+6.584*std::pow(er,-1.0494))) ;
218 
219  ionloss *= G4RandGauss::shoot(1.0,sig) ;
220  }
221 
222  ionloss *= 8.462 * z1 * z2 * m1 / rm ; // Return to [ev/(10^15 atoms/cm^2]
223 
224  if ( ionloss < 0.0) ionloss = 0.0 ;
225 
226  return ionloss;
227 }
228 
229 
230 
231 
232