A new determination of the (109)Cd half-life was made by a time series of measurements of an aqueous sample using a re-entrant type ionisation chamber. The measurement campaign covered a period of 6 years or approximately 4.7 half-lives of (109)Cd. The resulting value of 462.1 (3) days is in good agreement with the recently published values of 462.29 (30) days and 462.3 (8) days. This new half-life determination will allow evaluators to specify a recommended value of the (109)Cd half-life making it more accurate and precise.
Keywords: Cd-109; Half-life; Ionisation chamber; Nuclear data.
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