PDF (676 K)

R.A. Cecil^a, B.D. Anderson^a and R. Madey^a

^aDepartment of Physics, Kent State University, Kent, Ohio 44242, U.S.A.

Abstract

Several improvements have been made to the Monte-Carlo neutron detector
efficiency code of Stanton to provide improved agreement with several different
detector efficiency measurements. The impovements include a re-adjustment of
the inelastic cross sections for neutron-induced reactions on carbon, adoption
of new light-response functions, use of relativistic kinematics, and exact
determination of light deposited by escaping charged particles. The improved
calculations agree with measured efficiences for both plastic and liquid
hydrocarbon scintillators for neutron energies from 1 MeV to about 300 MeV and
for detector thresholds from about 0.1 MeV to 22 MeV equivalent-electron
energies; in most cases the agreement is good to within a few percent.

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