Higher order chance coincidences in a fast-slow coincidence arrangement
1960; Elsevier BV; Volume: 9; Issue: 2 Linguagem: Inglês
10.1016/0029-554x(60)90091-4
ISSN1878-3759
Autores Tópico(s)Neutrino Physics Research
ResumoIn this paper, we consider an ordinary fast-slow coincidence measurement with two radiation detectors. In addition to the chance coincidences due to two pulses (one from each detector) there are higher order chance coincidences which require a total of three or four pulses and whose relative contributions to the counting rate increase with source strength. Formulas for these effects are given, and methods for measuring the corrections are discussed. For a source with a simple decay scheme, and for the special cases of either very narrow or very wide analyzer channels it is shown that the higher order corrections may be neglected if the single counting rates are small compared to the reciprocal resolving time of the slow coincidence circuit.
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