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. 2023 Nov:201:110987.
doi: 10.1016/j.apradiso.2023.110987. Epub 2023 Aug 16.

Measurement of the activity and determination of the half-life of 225Ac at POLATOM

R Broda  1 , T Ziemek  2 , J Marganiec-Gałązka  2 , M Czudek  2 , K Kossert  3 , A Listkowska  2 , E Lech  2 , Z Tymiński  2 , P Saganowski  2 , R Coulon  4 , C Michotte  4
Affiliations

Measurement of the activity and determination of the half-life of 225Ac at POLATOM

R Broda et al. Appl Radiat Isot. 2023 Nov.

Abstract

A method for absolute measurements of the 225Ac activity in equilibrium with its progeny was developed. Measurements were performed using the triple-to-double coincidence ratio (TDCR) method in two different TDCR counters. The activity concentration of an 225Ac solution was determined and the solution was sent to the SIR system for a comparison. The half-life of 225Ac was determined by one of the TDCR counters and found to be 9.9150(63) days.

Keywords: (225)Ac; Activity standardization; Counting efficiency; Half-life; TDCR.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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