Re: [fluka-discuss]: [FLUKA] time distribution

From: Francesc Salvat-Pujol <>
Date: Thu, 8 Nov 2018 12:16:24 +0100

PS: you may also want to look at the USRYIELD card, which can score
time. See manual for WHAT(1).

On Thu, Nov 08 2018, at 11:30 +0100, Francesc Salvat-Pujol wrote:
>Dear Barbara,
>If you want to follow the production of residual nuclei, their decay in
>time, and the dose due to decay products for a given irradiation profile
>and cooling time (or combinations thereof), there is a thoroughly tested
>built-in way which should suffice. See the manual for cards IRRPROFI,
>RADDECAY, DCYSCORE, as well as e.g.
>However, if you want to simulate the spectrum of arrival times, say in
>some boundary, assumed with respect to the instant when the primary
>(beam) particle starts tracking, I am not aware of a pre-cooked way to
>do this. If you're up to a bit of user-routine coding, one place to
>start would be the main entry in mgdraw.f (called at every particle
>step) or ENTRY BXDRAW (called at boundary crossings). See the mgdraw.f
>notes in the manual to see what the subroutine arguments are.
>Here are some potentially useful variables in the COMMON block
>'(TRACKR)' which you can access (but do not modify):
> - ATRACK gives the age of the tracked particle with respect to the
> start of the primary (beam) particle.
> - IPRODC flags particles as prompt (1) or delayed (2) radioactive
> decay products.
> - JTRACK is the particle type.
> - LTRACK records the generation number.
>You could e.g. print out ATRACK and JTRACK (implementing whichever
>further logics to intercept whichever particles you need) to some output
>file to be postprocessed offline to produce your particle-arrival-time
>Hope this helps somewhat...
>On Wed, Nov 07 2018, at 17:18 +0000, Barbara Maria Latacz wrote:
>>Hi Fluka Experts,
>>Do you know if there is any "easy" way to simulate the time distribution of produced particles?
>>I want to check the effect of an activation of one material in time and thus I need to know how many particles are reaching my detector in the function of time.
>>(I want to know what is the decay time of the background).
>>Thank you for all you help!
>>Best regards,
>Francesc Salvat Pujol
>CH-1211 Geneva 23
>Tel: +41 22 76 64011
>Fax: +41 22 76 69474
>You can manage unsubscription from this mailing list at

Francesc Salvat Pujol
CH-1211 Geneva 23
Tel: +41 22 76 64011
Fax: +41 22 76 69474
You can manage unsubscription from this mailing list at
Received on Thu Nov 08 2018 - 14:01:46 CET

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