[fluka-discuss]: RE: turn off neutral pion decay

From: Eleftherios Skordis <eleftherios.skordis_at_cern.ch>
Date: Wed, 20 Dec 2017 14:04:15 +0000

Dear Guanying,

Depending on what you want to do, for example if you do not care about energy deposition, you might want to use a DISCARD card to discard PIZERO
Example from the manual:
"
* This example illustrates a typical situation where the use of DISCARD
 * can considerably reduce the computing time: for instance in pure
 * hadronic or neutron problems (fluence calculations without interest in
 * energy deposition). In this case electrons, positrons, photons, muons
 * and pi0 do not contribute to the result and can be discarded

     The same example, name-based:
DISCARD ELECTRON POSITRON PHOTON MUON+ MUON- PIZERO
"

On a more advanced way, you can kill every particle (but ions) by resetting to zero the weight (WEE=ZERZER) in the usrmed.f user routine as a function of the particle identity IJ.
To activate usrmed, you need a MAT-PROP card with SDUM=USERDIRE applying to materials.

Hope this helps

Kind regards

Lefteris

-----------------------

Eleftherios Skordis
Dep. EN/STI, CERN
CH-1211 GENEVA 23
SWITZERLAND

OFFICE: +41-22-7679541

________________________________________
From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on behalf of Zhu, Guanying [zhu.1475_at_buckeyemail.osu.edu]
Sent: 19 December 2017 22:44
To: fluka-discuss_at_fluka.org
Subject: [fluka-discuss]: turn off neutral pion decay

Dear fluka users,

I’m wondering if there is a way to turn off neutral pion decay, but still enable pi+ and pi- decay.



Thank you!

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Received on Wed Dec 20 2017 - 16:16:05 CET