Hmmmmm,
This is from: jpreisig@aol.com .
MCNP5, huh??? Cool.
First. look at your mcnp manual some more, especially in the tally
definitions section(s). Maybe what you want to do is described in the manual.
If this fails, call or e-mail the MCNP group at Los Alamos Lab. They
are
usually pretty good with helping mcnp users. Good Luck.
Regards, J.R. Preisig, Ph.D.
(Joe Preisig)