title: Standardisation and decay data of 186Re
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.
authors.affiliation: Centre for Ionising Radiation Metrology, National Physical Laboratory, Teddington, Middlesex, UK. denise.woods@npl.co.uk
authors.initials: DH
authors.lastname: Woods
authors.initials: M
authors.lastname: Ciocanel
authors.initials: LJ
authors.lastname: Husband
authors.initials: JD
authors.lastname: Keightley
authors.lastname: de Lavison P
authors.initials: S
authors.lastname: Lineham
authors.initials: MJ
authors.lastname: Woods
authors.initials: SA
authors.lastname: Woods