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fe4da5cc | 1 | * |
2 | * $Id$ | |
3 | * | |
4 | * $Log$ | |
5 | * Revision 1.1.1.1 1995/10/24 10:21:21 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 | REAL FUNCTION GAVRL3(GAMA,BETA,XM) | |
13 | C. | |
14 | C. ****************************************************************** | |
15 | C. * * | |
16 | C. * L3 shell x-section a la Gavrila * | |
17 | C. * Gama - L3 shell photoelectron gama * | |
18 | C. * Beta - L3 shell photoelectron beta * | |
19 | C. * XM - ratio of the electron mass to the photon energy * | |
20 | C. * * | |
21 | C. * ==>CALLED BY : GPHOT * | |
22 | C. * AUTHOR : J. Chwastowski * | |
23 | C. * * | |
24 | C. ****************************************************************** | |
25 | C. | |
26 | #if !defined(CERNLIB_SINGLE) | |
27 | DOUBLE PRECISION G,G2,G3,B,P1,P2,P3 | |
28 | #endif | |
29 | G = GAMA | |
30 | G2 = G*G | |
31 | G3 = G2*G | |
32 | B = BETA | |
33 | P1 = (4*G3-6*G2+5*G+3) | |
34 | P2 = -(G2-3*G+4) | |
35 | P3 = 1 | |
36 | IF(BETA.GT.0.0001) P3 = LOG(G*(1+B))/(B*G) | |
37 | GAVRL3 = (P1+P2*P3)*B*G*XM**5 | |
38 | END |