**From:** Tang, Alfred (*atang@phys.ksu.edu*)

**Date:** Fri Mar 16 2007 - 20:35:27 CET

**Previous message:**Markus Brugger: "RE: Source.f problem...?"**In reply to:**Lindley Winslow: "Thermal Neutron Capture Gammas"**Next in thread:**Giuseppe Battistoni: "Re: estimating neutron rate using USRTRACK"**Reply:**Giuseppe Battistoni: "Re: estimating neutron rate using USRTRACK"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ] [ attachment ]

Dear FLUKA users,

I am trying to use USRTRACK to estimate the muon-induced neutron rate in a liquid scintillator. I use a realistic muon profile as input and propagate the muons through a realistic detector. I measure the track lengths of muon, neutron and neutron balance of the LS region and hope to deduce an estimate for the neutron rate Rn as follow:

Rn=Rmu*A*B*C

where Rmu=muon rate on the LS region, A=neutron_tracklength/muon_tracklength, B=neutron_balance/muon_tracklength and C=sqrt(3). A has the meaning of the ratio of the fluence of the neutron and the fluence of muon. B hopefully gives me the number of neutrons per primary muon. Assuming that the tracklength of neutron is measured only along the direction parallel to the muon track, the factor C=sqrt(3) is meant to convert neutron fluence into neutron rate.

Since I do not know how FLUKA score tracklength, I do not know if my assumptions are correct. If I am right in assuming the things aforementioned, I am able to calculate a neutron rate for KamLAND that agrees with the experimental result exactly. Can anyone comment on the correctness of this calculation?

Regards,

Alfred

*****************************************************

Alfred Tang

Physics Department

Kansas State University

13 Cardwell Hall

Manhattan, KS 66506

(785) 532-1699

http://www.phys.ksu.edu/personal/atang

**Previous message:**Markus Brugger: "RE: Source.f problem...?"**In reply to:**Lindley Winslow: "Thermal Neutron Capture Gammas"**Next in thread:**Giuseppe Battistoni: "Re: estimating neutron rate using USRTRACK"**Reply:**Giuseppe Battistoni: "Re: estimating neutron rate using USRTRACK"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ] [ attachment ]

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