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A note on the multiplicity expressions in nuclear safeguards

✍ Scribed by Imre Pázsit; Andreas Enqvist; Lénárd Pál

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
119 KB
Volume
603
Category
Article
ISSN
0168-9002

No coin nor oath required. For personal study only.

✦ Synopsis

The purpose of this note is to point out notational inconsistencies and actual errors in some of the basic and often cited expressions of Ensslin et al. [Application Guide to Neutron Multiplicity Counting, Los Alamos Report LA-13422-M, 1998], even if the final formulae are correct. These expressions describe the measured multiplicity counting rates, i.e. singles, doubles, and triples rates S, D, and T, as parameters of a multiplying sample, through analytical expressions of the factorial moments of the neutrons generated in the sample by one initial source event. They serve as the basis of unfolding these parameters by the inversion of the formulae.

The motivation for this brief communication is twofold. First, Ref.

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