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fe4da5cc | 1 | * |
2 | * $Id$ | |
3 | * | |
4 | * $Log$ | |
5 | * Revision 1.1.1.1 1995/10/24 10:21:22 cernlib | |
6 | * Geant | |
7 | * | |
8 | * | |
9 | #include "geant321/pilot.h" | |
10 | *CMZ : 3.21/02 29/03/94 15.41.21 by S.Giani | |
11 | *-- Author : | |
12 | FUNCTION GBRSGM(Z,T,BCUT) | |
13 | C. | |
14 | C. ****************************************************************** | |
15 | C. * * | |
16 | C. * Calculates cross-section in current material * | |
17 | C. * for discrete(hard) muon BREMSSTRAHLUNG. * | |
18 | C. * (SIG in barn/atom) * | |
19 | C. * * | |
20 | C. * ==>Called by : GBRSGA * | |
21 | C. * Author L.Urban ********* * | |
22 | C. * * | |
23 | C. ****************************************************************** | |
24 | C. | |
25 | #include "geant321/gconsp.inc" | |
26 | DIMENSION C(52) | |
27 | SAVE C | |
28 | PARAMETER (AKSI=2.30,ALFA=1.06,GAM=0.63) | |
29 | C | |
30 | PARAMETER (CONMX=0.130653) | |
31 | C CONMX=0.75*SQRT(2.7182...)*EMMU | |
32 | DATA C/ 0.949313E-07,-0.819600E-07, 0.529075E-07,-0.832023E-08 | |
33 | + , 0.539299E-09,-0.127042E-10,-0.165784E-08,-0.307788E-07 | |
34 | + , 0.977905E-08,-0.113658E-08, 0.574481E-10,-0.106221E-11 | |
35 | + , 0.968339E-09,-0.108640E-08,-0.177634E-09, 0.889497E-10 | |
36 | + ,-0.876878E-11, 0.264303E-12, 0.216263E-08,-0.152680E-08 | |
37 | + , 0.380989E-09,-0.455274E-10, 0.264172E-11,-0.596016E-13 | |
38 | + , 0.444927E-09,-0.272978E-09, 0.645634E-10,-0.748783E-11 | |
39 | + , 0.424890E-12,-0.940837E-14, 0.162289E-10,-0.362486E-11 | |
40 | + ,-0.576652E-12, 0.211269E-12,-0.185482E-13, 0.522065E-15 | |
41 | + ,-0.215590E-09, 0.112204E-09,-0.819133E-11, 0.145128E-12 | |
42 | + ,-0.206029E-09, 0.559940E-10,-0.483350E-11, 0.134252E-12 | |
43 | + ,-0.368469E-10, 0.999457E-11,-0.904967E-12, 0.272717E-13 | |
44 | + ,-0.303446E-11, 0.853429E-12,-0.785466E-13, 0.236435E-14/ | |
45 | C. | |
46 | C. ------------------------------------------------------------------ | |
47 | C. | |
48 | GBRSGM=0. | |
49 | IF(BCUT.GE.T) GOTO 99 | |
50 | C | |
51 | E=T+EMMU | |
52 | ECMAX=E-CONMX*Z**0.333333 | |
53 | IF(BCUT.GE.ECMAX) GOTO 99 | |
54 | X=LOG(E/EMMU) | |
55 | Y=LOG(BCUT/EMMU) | |
56 | C | |
57 | S=0. | |
58 | YY=1. | |
59 | DO 30 I=1,6 | |
60 | XX=1. | |
61 | DO 20 J=1,6 | |
62 | K=6*I+J-6 | |
63 | S=S+C(K)*XX*YY | |
64 | XX=XX*X | |
65 | 20 CONTINUE | |
66 | YY=YY*Y | |
67 | 30 CONTINUE | |
68 | SS=0. | |
69 | YY=1. | |
70 | DO 50 I=1,4 | |
71 | XX=1. | |
72 | DO 40 J=1,4 | |
73 | K=4*I+J+32 | |
74 | SS=SS+C(K)*XX*YY | |
75 | XX=XX*X | |
76 | 40 CONTINUE | |
77 | YY=YY*Y | |
78 | 50 CONTINUE | |
79 | S=S+Z*SS | |
80 | IF(S.LE.0.) GOTO 99 | |
81 | C | |
82 | FAC=LOG(ECMAX/BCUT) | |
83 | IF(FAC.LE.0.) GOTO 99 | |
84 | FAC=Z*(Z+AKSI*(1.+GAM*LOG(Z)))*FAC**ALFA | |
85 | GBRSGM=FAC*S | |
86 | C | |
87 | 99 RETURN | |
88 | END |