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A comparison of untagged gamma-ray and tagged-neutron yields from 241AmBe and 238PuBe sources
Lund University.
University of Glasgow, Scotland.
University of Glasgow, Scotland.
Lund University.
Show others and affiliations
2017 (English)In: Applied Radiation and Isotopes, ISSN 0969-8043, E-ISSN 1872-9800, Vol. 127, p. 98-102Article in journal (Refereed) Published
Abstract [en]

Untagged gamma-ray and tagged-neutron yields from 241AmBe and 238PuBe mixed-field sources have been measured. Gamma-ray spectroscopy measurements from 1 to 5 MeV were performed in an open environment using a CeBr3 detector and the same experimental conditions for both sources. The shapes of the distributions are very similar and agree well with previous data. Tagged-neutron measurements from 2 to 6 MeV were performed in a shielded environment using a NE-213 liquid-scintillator detector for the neutrons and a YAP(Ce) detector to tag the 4.44 MeV gamma-rays associated with the de-excitation of the first-excited state of 12C. Again, the same experimental conditions were used for both sources. The shapes of these distributions are also very similar and agree well with previous data, each other, and the ISO recommendation. Our 238PuBe source provides approximately 2.6 times more 4.44 MeV gamma-rays and 2.4 times more neutrons over the tagged-neutron energy range, the latter in reasonable agreement with the original full-spectrum source-calibration measurements performed at the time of their acquisition.

Place, publisher, year, edition, pages
2017. Vol. 127, p. 98-102
Keywords [en]
Americium-beryllium, Cerium-bromide, Fast neutrons, Gamma-rays, NE-213, Plutonium-beryllium, Pulse-shape discrimination, Time-of-flight
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-30986DOI: 10.1016/j.apradiso.2017.05.014ISI: 000407535600015PubMedID: 28564615Scopus ID: 2-s2.0-85019700359Local ID: STCOAI: oai:DiVA.org:miun-30986DiVA, id: diva2:1115023
Available from: 2017-06-26 Created: 2017-06-26 Last updated: 2017-12-18Bibliographically approved

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Hall-Wilton, Richard

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