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Digital discrimination of neutrons and ?-rays in liquid scintillators using pulse gradient analysis.

Joyce, Malcolm J. and Aspinall, M. D. and D'Mellow, B. and Mackin, R. O. (2007) Digital discrimination of neutrons and ?-rays in liquid scintillators using pulse gradient analysis. Nuclear Instruments and Methods A, A578 (1). pp. 191-197. ISSN 0168-9002

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A method for the digital discrimination of neutrons and γ-rays in mixed radiation fields is described. Pulses in the time domain, arising from the interaction of photons and neutrons in a liquid scintillator, have been produced using an accepted empirical model and from experimental measurements with an americium–beryllium source. Neutrons and γ-rays have been successfully discriminated in both of these data sets in the digital domain. The digital discrimination method described in this paper is simple and exploits samples early in the life of the pulse. It is thus compatible with current embedded system technologies, offers a degree of immunity to pulse pile-up and heralds a real-time means for neutron/γ discrimination that is fundamental to many potential industrial applications.

Item Type: Article
Journal or Publication Title: Nuclear Instruments and Methods A
Additional Information: This paper is an example of the research supporting the development of a portable digital neutron spectrometer, which was commercialized via a spin-out company (, resulted in IP protected by patent (GB2422195 September 2003). This returns royalties to the academic team and also stimulated the award of a DTi R&D award to this company for take-up of the technology. This research has itself stimulated numerous other research opportunities with the Home Office (Dr Tim Sheldon, MoD (Prof Philip Beeley,, BAE SYSTEMS (Dr Doug King, and the NDA (Dr Neil Smart, RAE_import_type : Journal article RAE_uoa_type : General Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 2653
Deposited By: ep_importer
Deposited On: 27 Mar 2008 13:55
Refereed?: Yes
Published?: Published
Last Modified: 24 Jan 2014 05:16
Identification Number:

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