Activates Rayleigh (coherent) scattering and Compton binding corrections in
selected regions. Only meaningful when the EMF option has been requested,
explicitly or implicitly via option DEFAULTS.
See also EMF
WHAT(1) = 1.0 : both Rayleigh scattering and Compton binding corrections
are activated
2.0 : only Rayleigh scattering activated
3.0 : only Compton binding corrections are activated
0.0 : ignored
< 0.0 : no Rayleigh scattering and no binding corrections for
Compton
Default: if option DEFAULTS is used with SDUM = NEW-DEFAults or
HADROTHErapy, the default is 3.0.
If it is not used, or is used with SDUM = CALORIMEtry,
EM-CASCAde, ICARUS or PRECISIOn, the default is 1.0.
With any other value of SDUM, the default is 0.0.
WHAT(2) = lower bound of the region indices where Rayleigh scattering
and/or Compton binding corrections are requested.
("From region WHAT(2)...")
Default = 2.0
WHAT(3) = upper bound of the region indices where Rayleigh scattering
and/or Compton binding corrections are requested.
("...to region WHAT(3)...")
Default = WHAT(2)WHAT(4) = step length in assigning indices.
("...in steps of WHAT(4)").
Default = 1.0
WHAT(5), WHAT(6), SDUM : not used
Default (option EMFRAY not requested): if option DEFAULTS is used with
SDUM = NEW-DEFAults or HADROTHErapy, binding corrections in
Compton scattering are activated, but not Rayleigh scattering.
If DEFAULTS is not used, or is used with SDUM = CALORIMEtry,
EM-CASCAde, ICARUS or PRECISIOn, both are activated.
With any other value of SDUM, binding corrections and Rayleigh
scattering are not activated.
Note:
1) The treatment of Rayleigh scattering is rather poor for non
monoatomic materials (it assumes additivity and does not take into
account important molecular effects). However, Rayleigh scattering,
in general, has little effect on energy deposition and on particle
transport.
Example:
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7...
EMF
EMFRAY 1.0 8.0 12.0 4.0
EMFRAY 3.0 9.0 15.0 2.0
* In the above example, Compton binding corrections are requested in
* regions 8 to 15, excluding regions 10 and 14.
* Rayleigh scattering is requested only in regions 8 and 12
