Bass, G A; Duane, S; Galer, S E; Homer, M J; Kelly, M; Manning, J W; Maughan, D J; Nutbrown, R F; Sander, T; Shipley, D R; Snaith, J A D (2017) The NPL air kerma primary standard PS5-1/PS5-2 for 137Cs and 60CO: summary of factors. NPL Report. IR 41

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Abstract

Since the 1950s the UK primary standard for the realisation of air kerma for high energies consisted of three graphite-walled cylindrical cavity ionisation chambers. These chambers have become increasingly unreliable in recent years and a project was started at the National Physical Laboratory to replace them. Spherical graphite-walled cavity ionisation chambers PS5-1 and PS5-2 have been constructed and commissioned and this report summarises the factors for the new chambers.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	IR 41
Subjects:	Ionising Radiation > Dosimetry
Divisions:	Chemical, Medical & Environmental Science
Last Modified:	27 Feb 2018 15:09
URI:	https://eprintspublications.npl.co.uk/id/eprint/7732