Re: residual nucleus infomation

From: Shirley Li <>
Date: Sat, 26 Jan 2013 14:04:48 -0500

Hi Mary,

Thank you very much for your explanation!

So, if I check ICRES from mgdraw.f and IZ from usrrnc, should I expect
exactly the same number? I'm running 1000 muons through oil (CH2) to get
isotope production. I print out ICRES, IBRES and WTRACK from mgdraw.f and
IZ, IA, WEE from usrrnc.f. However, the numbers don't always match. E.g., I
got 20 7Be from mgdraw.f and 33 7Be from usrrnc.f. I understand that I can
get isotope production from RESNUCLEi scoring, but I just want to make sure
that everything is consistent.

Thanks a lot!


On Fri, Jan 25, 2013 at 5:02 PM, Mary Chin <> wrote:

> Dear Shirley,
> ICRES is a variable in RESNUC, which is an include file.
> IZ is an argument for USRRNC, which is a subroutine.
> ICRES will remain undefined unless the user routine contains the line:
> Incidently, in the usrrnc.f template distributed, this line is absent.
> If IZ is already available as an argument in usrrnc.f, why would one
> attempt/wish to use ICRES instead? One would use ICRES, for example, in
> mgdraw.f, where the atomic number is not readily available as an argument.
> :) mary
> On Thu, 24 Jan 2013, Shirley Li wrote:
> Dear FLUKA users,
>> I'm not sure what's the difference between ICRES (residual nucleus atomic
>> number) in RESNUC and IZ
>> (also residual nucleus atomic number) in usrrnc.f. Could anyone explain
>> this to me?
>> Thank you very much!
>> Best,
>> Shirley
Received on Sun Jan 27 2013 - 19:52:31 CET

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