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fe4da5cc | 1 | * |
2 | * $Id$ | |
3 | * | |
4 | * $Log$ | |
5 | * Revision 1.1.1.1 1995/10/24 10:20:13 cernlib | |
6 | * Geant | |
7 | * | |
8 | * | |
9 | #include "geant321/pilot.h" | |
10 | *CMZ : 3.21/02 29/03/94 15.41.19 by S.Giani | |
11 | *-- Author : | |
12 | FUNCTION GFCOUL(Z) | |
13 | C. | |
14 | C. ****************************************************************** | |
15 | C. * * | |
16 | C. * Compute Coulomb correction for pair production and Brem * | |
17 | C. * REFERENCE : EGS MANUAL SLAC 210 - UC32 - JUNE 78 * | |
18 | C. * FORMULA 2.7.17 * | |
19 | C. * * | |
20 | C. * ==>Called by : GSMIXT * | |
21 | C. * Author M.Maire ********* * | |
22 | C. * * | |
23 | C. ****************************************************************** | |
24 | C. | |
25 | PARAMETER (ALPHA = 7.29927E-03) | |
26 | C | |
27 | AZ2 = (ALPHA*Z)**2 | |
28 | AZ4 = AZ2 * AZ2 | |
29 | FP = ( 0.0083*AZ4 + 0.20206 + 1./(1.+AZ2) ) * AZ2 | |
30 | FM = ( 0.0020*AZ4 + 0.0369 ) * AZ4 | |
31 | GFCOUL = FP - FM | |
32 | END |