Re: [fluka-discuss]:

From: Stefan Roesler <>
Date: Thu, 26 Nov 2015 13:06:47 +0100

Dear Zhongwen

I suggest that you have a look at the input file that is provided with the
exercise on activation calculations at the FLUKA beginners course:

It demonstrates how to calculate specific activity with both RESNUCLE and
USRBIN cards. Please note that in your input file you did not associate
your RESNUCLE card with a certain cooling time. Therefore, your results
will be residual nuclei per cm3 per primary (and not Bq/cm3).

Furthermore, while RESNUCLE, associated with a certain cooling time gives
you indeed a list of specific activities for individual nuclides, a USRBIN
scoring of ACTIVITY only returns the total specific activity.

Regarding processing of binary output files from both RESNUCLE and USRBIN
detectors I suggest that you use Flair which would call the respective
routines for obtaining specific activity averaged over several


On Mon, 23 Nov 2015, Zhongwen Chang wrote:

> Hi, recently I start to learn FLUKA because I would like to calculate the
> activities on the components near a beam. My question is, how to obtain the
> activity (Bq/cm**3)? I would like to have a list like this:
>  Z   A   Activity(Bq/cm**3)
> My .inp has been enclosed. I managed to get the nuclei list (Z, A, residual
> nuclei per cm**3 per primary )from output written after RESNUCLEi card, by
> using some external scripts. My naive guess would be I need some script to
> read the output from USRBIN card too. 
> Your help will be highly appreciated!
> Zhongwen

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Received on Thu Nov 26 2015 - 14:38:09 CET

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