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The current interest in the use of 192Ir for brachytherapy prompted a re-evaluation of existing half-life values. Using the evaluation criteria adopted in a recent IAEA-Coordinated Research Programme, it was determined that the uncertainty on the half-life obtained by evaluating published data spanning the last 20 years is too large. Further measurements of the half-life have been carried out using high-pressure re-entrant ionisation chambers. The results of these latest measurements are presented together with a re-evaluation of the half-life using the IAEA-CRP criteria. The recommended half-life of 192Ir is 73.830 +/- 0.018 days.

Additional information

Authors: WOODS M J, National Physical Laboratory, Teddington (GB);LUCAS S E M, National Physical Laboratory, Teddington (GB);REHER D F G, JRC Geel (BE);SIBBENS G, JRC Geel (BE)
Bibliographic Reference: Paper presented: International Symposium on Radionuclide Metrology and its Applications (ICRM '91), Madrid (ES), May 27-31, 1991
Availability: Available from (1) as Paper EN 36201 ORA
Record Number: 199111220 / Last updated on: 1994-12-02
Original language: en
Available languages: en