 IntModel = '"sibyll"'
 IntModel = '"qgsjet2"'
 IntModel = '"sibyll"'
 IntModel = '"qgsjet1"'
 IntModel = '"dpmjet3"'
 $PARAM
 DestEventNo = 100000, 100000
 InitRN = 3335431, -777663,
 IntModel = '"qgsjet2"'

 Trace = 0
 TraceDir = './'
 SeedFile ='  '
 $END

 $HPARAM
 UserHookc ='6 1  1   0.  -0.49   7000',
            '6 1  1   0.  -0.49  -7000',
 UserHookr = 0.9999 1.0 14000

 $END
make Trace non zero if you want to check the interaction visually.
	(Use disptarcebygeomv in  Epics/Util/Geomview)
TraceDir is the directory where trace informatin is put.
UserHookc:  first line is to specify the projectile.  
     	       code subcode charge px, py, pz  (GeV);  ptcl moves  +z direction 
            second line is for the target.
               the same as projectile .  -z is the particle direction
UserHookr: first two are  min and max range of direction cosine in z-direction..
	       If want to select only those going +z direction, use 0., 1.0
           3rd one is the length of the track to visualize the collision. 
