Chiera NM, Dressler R, Sprung P, Talip Z, Schumann D. Determination of the half-life of gadolinium-148.
Appl Radiat Isot 2023;
194:110708. [PMID:
36731388 DOI:
10.1016/j.apradiso.2023.110708]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 01/27/2023] [Indexed: 01/29/2023]
Abstract
The half-life of the alpha-emitter 148Gd was measured using the "direct method", in which the number of atoms is directly determined and their activity is then measured. Pure Gd samples containing megabecquerels of 148Gd were obtained by reprocessing proton-irradiated tantalum material. Multicollector-inductively coupled plasma mass spectrometry was performed to determine the amount of 148Gd atoms retrieved. The activity of the 148Gd atoms contained in the Gd sample was measured by means of alpha-spectrometry. The half-life of 148Gd was deduced to be 86.9 years, with a combined uncertainty of 4.5%.
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