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Published on: April 18, 2019
Standardisation and decay data of 186Re
1Centre for Ionising Radiation Metrology, National Physical Laboratory, Teddington, Middlesex, UK. denise.woods@npl.co.uk
Abstract:
A solution of 186Re was standardised using the 4pi(PC)-gamma-coincidence technique. Two gamma channels were employed to provide separate detection efficiency data arising from the two decay modes (beta and electron capture): the resulting data were analysed using a two-dimensional extrapolation. Calibration factors for a high pressure re-entrant ionisation chamber as well as for the NPL secondary standard radionuclide calibrator were also determined. An efficiency-calibrated germanium spectrometer was used to measure the emission probabilities of the X- and gamma-rays.
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