Sephton, J P; Johansson, L C; Williams, J M (2008) A low noise current sensitive amplifier-discriminator system for beta particle counting. Appl. Radiat. Isot., 66 (6-7). pp. 890-894.

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Abstract

NPL has developed a low noise current amplifier/discriminator system for radionuclides that emit low energy electrons and x-rays. The new beta amplifier is based on the low noise Amptek A-250 operational amplifier. The design has been configured for optimum signal to noise ratio. The new amplifier is described and results obtained using primarily electron-capture decaying radionuclides are presented. The new amplifier gives rise to higher particle detection efficiency than the previously used Atomic Energy of Canada Limited designed amplifier. This is shown by measurements of 54Mn and 65Zn. The counting plateaux are significantly longer and have reduced gradients.

Item Type:	Article
Subjects:	Ionising Radiation Ionising Radiation > Radioactivity
Last Modified:	02 Feb 2018 13:15
URI:	http://eprintspublications.npl.co.uk/id/eprint/4184

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