Collins, S M; Keightley, J; Gilligan, C*; Gasparro, J; Pearce, A (2014) Determination of the gamma emission intensities of 111Ag. Appl. Radiat. Isot., 87. pp. 107-111.

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Abstract

A radioactive solution of 111Ag, standardised by the absolute measurement methods 4p(PC)- and 4p(LS)- coincidence counting at the National Physical Laboratory (NPL), was measured by two independently calibrated HPGe spectrometers in order to estimate the emission intensities and to determine the absolute intensity, with the aim of improving the currently published values. An absolute intensity value of 6.68 (7)% was obtained for the 342.1 keV emission, which is in agreement with previously reported values, but greatly reduces the uncertainty. Additionally, this work proposes a new emission intensity for the 450.0 keV emission that has not been previously reported, with an absolute intensity of 0.000482 (12)%. An investigation of the published emission intensities shows significant discrepancies that require resolution.

Item Type:	Article
Keywords:	Ag-111, Gamma emission intensities, Spectroscopy, Radioactivity
Subjects:	Ionising Radiation Ionising Radiation > Radioactivity
Identification number/DOI:	10.1016/j.apradiso.2013.11.007
Last Modified:	02 Feb 2018 13:13
URI:	https://eprintspublications.npl.co.uk/id/eprint/6182