[u/mrichter/AliRoot.git] / GEANT321 / gcons / gxsi.F

*
* $Id$
*
* $Log$
* Revision 1.1.1.1  1995/10/24 10:20:18  cernlib
* Geant
*
*
#include "geant321/pilot.h"
*CMZ :  3.21/02 29/03/94  15.41.20  by  S.Giani
*-- Author :
      FUNCTION GXSI (Z)
C.
C.    ******************************************************************
C.    *                                                                *
C.    *  COMPUTE SCREENING FACTOR   FOR PAIR PRODUCTION AND BREM       *
C.    *  REFERENCE : EGS MANUAL SLAC 210 - UC32 - JUNE 78              *
C.    *                        FORMULA 2.7.22                          *
C.    *                                                                *
C.    *    ==>Called by : GSMIXT                                       *
C.    *       Author    M.Maire *********                              *
C.    *                                                                *
C.    ******************************************************************
C.
      DATA AL183  , AL1440 / 5.20948 , 7.27239 /
      ALZ  = LOG(Z)/3.
      GXSI  = (AL1440 - 2*ALZ) / (AL183 - ALZ - GFCOUL(Z))
      END
Commit	Line	Data
fe4da5cc	1	*
	2	* $Id$
	3	*
	4	* $Log$
	5	* Revision 1.1.1.1 1995/10/24 10:20:18 cernlib
	6	* Geant
	7	*
	8	*
	9	#include "geant321/pilot.h"
	10	*CMZ : 3.21/02 29/03/94 15.41.20 by S.Giani
	11	*-- Author :
	12	FUNCTION GXSI (Z)
	13	C.
	14	C. ******************************************************************
	15	C. * *
	16	C. * COMPUTE SCREENING FACTOR FOR PAIR PRODUCTION AND BREM *
	17	C. * REFERENCE : EGS MANUAL SLAC 210 - UC32 - JUNE 78 *
	18	C. * FORMULA 2.7.22 *
	19	C. * *
	20	C. * ==>Called by : GSMIXT *
	21	C. * Author M.Maire ********* *
	22	C. * *
	23	C. ******************************************************************
	24	C.
	25	DATA AL183 , AL1440 / 5.20948 , 7.27239 /
	26	ALZ = LOG(Z)/3.
	27	GXSI = (AL1440 - 2*ALZ) / (AL183 - ALZ - GFCOUL(Z))
	28	END