EXPTRANS

    !!! NOT IMPLEMENTED YET !!!
    Requests an exponential transformation ("path stretching")


     
WHAT(1)
 >= 0.0 : 
WHAT(2)
 to 
WHAT(5)
 are used to input a parameter
                      defining the exponential transformation in various
                      regions
             <  0.0 : 
WHAT(2)
 to 
WHAT(5)
 are used to define the particles
                      to which the exponential transformation must be
                      applied
             
Default
 = 0.0

    For 
WHAT(1)
 >= 0.0 :

     
WHAT(2)
 = exponential transformation parameter ETA
                ( 0 =< |ETA| < 1 )
               This value can be overridden in the user routine UBSSET
               (argument EXPTR in the calling list, see 13})
               
Default
 = 0.0

     
WHAT(3)
 = lower bound (or corresponding name) of the region indices
               with exponential transformation parameter ETA = 
WHAT(2)
                ("From region 
WHAT(3)
...")
                
Default
 = 2.0.

     
WHAT(4)
 = upper bound of (or corresponding name) the region indices
               with exponential transformation parameter equal to 
WHAT(2)
                ("...to region 
WHAT(4)
...")
                
Default
 = 
WHAT(3)

     
WHAT(5)
 = step length in assigning indices. ("...in steps of
                
WHAT(5)
").
                
Default
  = 1.0

     
WHAT(6)
, 
SDUM
 : not used

    For 
WHAT(1)
 < 0 :

     
WHAT(2)
 = lower bound (or corresponding name) of the particle indices
               to which exponential transformation is to be applied
               ("From particle 
WHAT(2)
...")
               
Default
 = 1.0.

     
WHAT(3)
 = upper bound (or corresponding name) of the particle indices
               to which exponential transformation is to be applied
                ("...to particle 
WHAT(3)
...")
                
Default
 :  = 
WHAT(2)
 if 
WHAT(2)
 > 0.0, otherwise = 40.0
                (low-energy neutrons)

     
WHAT(4)
 = step length in assigning indices. ("...in steps of
                
WHAT(4)
"). 
Default
: 1.0

     
WHAT(5)
, 
WHAT(6)
, 
SDUM
 : not used

     
Default
 (option EXPTRANS not given): no exponential transformation

     Example (number based):

 *...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....
 EXPTRANS          1.       0.8       10.       18.        8.       0.
 EXPTRANS         -1.        7.        8.        0.        0.       0.
 *  Exponential transformation is requested for photons (particle no. 7)
 *  and neutrons (particle 8), in regions 10 and 18 with an ETA parameter
 *  equal to 0.8

     The same example, name-based:

 EXPTRANS          1.       0.8  tenthReg  eighteen        8.       0.
 EXPTRANS         -1.    PHOTON   NEUTRON        0.        0.       0.
* End_Devel_seq

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