Sander, T; Bass, G A; Cashmore, M T D; Duane, S; Galer, S E; Homer, M J; Lee, N D; Nutbrown, R F; Shipley, D R (2017) The NPL absorbed dose primary standard graphite calorimeter (2015 design) for 60Co: summary of correction and conversion factors. NPL Report. IR 45

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Abstract

Since the 1980s the UK primary standard for the realisation of absorbed dose for 60Co gamma rays has been a Domen-type graphite calorimeter. This calorimeter has become increasingly unreliable in recent years and a project was started at the National Physical Laboratory to replace it. A new graphite calorimeter for the measurement of therapy level photons (60Co and 4 MV - 25 MV linac beams) has been constructed and commissioned and this report summarises the factors for the new photon calorimeter (2015 design). This report focuses on the 60Co beam quality only.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	IR 45
Keywords:	primary standard, graphite calorimeter, absorbed dose, 60Co, photon
Subjects:	Ionising Radiation > Dosimetry
Divisions:	Chemical, Medical & Environmental Science
Last Modified:	27 Feb 2018 15:16
URI:	https://eprintspublications.npl.co.uk/id/eprint/7733