Re: [fluka-discuss]: Getting number of produced neutrons - event-by-event

From: George Kharashvili <>
Date: Tue, 1 Aug 2017 08:56:36 -0400 (EDT)

Dear Oliver,

You can define a region representing the calorimeter and score neutron fluence crossing the boundary between the vacuum and this region using USRBDX card, or the average neutron fluence over the calorimeter region using USRTRACK card.
The scoring lectures from the latest beginner's and advanced courses are available at:

I hope this helps,

George Kharashvili
Jefferson Lab Radiation Control
----- Original Message -----
From: "Oliver Suranyi" <>
To: "FLUKA Discussion List" <>
Sent: Tuesday, August 1, 2017 4:11:13 AM
Subject: [fluka-discuss]: Getting number of produced neutrons - event-by-event
Dear all,
I'm working with pPb collisions at CMS experiment. I would like to count
the number of neutrons hitting the Zero Degree Calorimeter (ZDC - this is a
10*10 cm square, at a 140 m distance from the interaction point). These
very forward neutrons are most probably produced in evaporation processes
and intranuclear cascades and have ~TeV energy.
I made the following geometry: 10*10*28000 cm paralellepiped filled with
vacuum and a black hole region around it, to discard tracks missing the
ZDC. The pPb collision takes place in the middle of this region. Is it
possible to count the number of neutrons hitting the end of this region
(the ZDC detector) in a certain event? I figured it out, that it may be
connected to SCORE and EVENTDAT input cards.
Thank you for your help,
Best regards,
Oliver Suranyi
Eotvos Lorand University
PhD student
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Received on Tue Aug 01 2017 - 15:59:06 CEST

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