Dear Tan Shi,
The IONSPLIT option was improved even before FLUKA-2020, since FLUKA-2011-2x.
Please read replies to Paolo's question here
http://www.fluka.org/web_archive/earchive/new-fluka-discuss/13612.html
The bottom line is that if you are studying activation by GeV electrons, you must link RQMD and DPMJET to prevent simulation of energetic ions without appropriate interaction model. May not be a significant factor, depending on your problem, but it is still required. Instructions on how to do this:
http://pcfluka.mi.infn.it/web_archive/earchive/new-fluka-discuss/16770.html
General overview of heavy ion interaction models is given in FLUKA course lecture
https://indico.cern.ch/event/753612/contributions/3121528/attachments/1974725/3286240/Heavy_Ions_2019.pdf
Best regards,
George
________________________________
From: owner-fluka-discuss_at_mi.infn.it <owner-fluka-discuss_at_mi.infn.it> on behalf of Tan Shi <tanshi_at_umich.edu>
Sent: Monday, May 18, 2020 3:08 AM
To: fluka-discuss_at_fluka.org <fluka-discuss_at_fluka.org>
Subject: [EXTERNAL] [fluka-discuss]: Question about difference between Fluka2020 and Fluka2011 in Ionsplitting (for activation study)
Dear Fluka experts,
After I updated to Fluka 2020 (with "flukadpm3" installed), I came across the following error: "Coalescence activated and beam above BME limit with no rQMD and no or incompatible IONSPLIT option!". However, the same input file works fine with Fluka 2011. I have seen several questions related to this error, but I still do not fully understand the underlying cause. I attached the relevant physics cards in my input file. I also used several commands related to radionuclide decay since I am simulating activation induced by high energy electrons (~GeV). Should I add other physics processes such as IONSPLITting here? Thanks for the help!
PHYSICS 3. EVAPORAT
PHYSICS 1. COALESCE
Best,
Tan Shi
--
Postdoctoral Research Fellow
Department of Nuclear Engineering and Radiological Sciences
University of Michigan
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Received on Mon May 18 2020 - 15:40:37 CEST