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The replacement of cadmium as a thermal neutron filter.

D'Mellow, Bob and Thomas, David J. and Joyce, Malcolm J. and Kolkowski, Peter and Roberts, Neil J. and Monk, Stephen D. (2007) The replacement of cadmium as a thermal neutron filter. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 577 (3). pp. 690-695. ISSN 0168-9002

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Abstract

Cadmium is widely used where it is desirable to eliminate the thermal component of a neutron spectrum. However, with the restrictions on the use of cadmium in the European Union due to the recent European Union Directive 2002/95/EC (RoHS), the inclusion of cadmium in instrumentation is becoming untenable. The work presented here examines a number of candidate materials in order to find a suitable replacement for cadmium. It is shown through the examination of cross-section data, MCNP modelling and experimental evaluation that flex-boron is suitable in some applications while gadolinium has absorption properties which are broadly similar to cadmium. However, it is clear that none of the candidates can quite equal to the performance of cadmium. (c) 2007 Elsevier B.V. All rights reserved.

Item Type: Article
Journal or Publication Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Uncontrolled Keywords: thermal neutrons ; shielding material ; cadmium ; gadolinium ; RoHS directive
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
Faculty of Science and Technology > School of Computing & Communications
ID Code: 34821
Deposited By: Dr Stephen Monk
Deposited On: 09 Dec 2010 10:26
Refereed?: Yes
Published?: Published
Last Modified: 30 May 2014 11:49
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/34821

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