[fluka-discuss]: ICRES and IBRES not filled for neutron capture on 1H

From: Joshua Albert <joalbert_at_imap.iu.edu>
Date: Wed, 2 Jul 2014 19:12:00 -0400

Dear FLUKA experts,

I am continuing studies on cosmogenic neutron captures, and I have run into a small problem. I am able to get detailed information about most neutron captures by using usdraw and printing events with ICODE = 300 and ICRES and IBRES greater than 1. This is a good way to confirm how many of the residual nuclei (as tracked by usrrnc.f as well as regular resnuclei cards) come from neutron capture, and how many come from other processes.

Unfortunately, this does not work for capture on 1H. For some reason, ICRES and IBRES are both set to zero for this interaction, rather than 1 and 2, as one might expect. I can print out all secondary gammas with energies near 2.22 MeV, but this seems like a very inelegant solution, and may have additional complications. Do you know why ICRES and IBRES are not being properly set for this capture, and if there is a better workaround to positively identify neutron captures on 1H?

Thank you,
Josh
Received on Thu Jul 03 2014 - 02:28:09 CEST