Takács MP, Kossert K. Half-life determination of short-lived nuclear levels in
237Np (59.54 keV),
233Pa (86.47 keV) and
227Ac (27.37 keV).
Appl Radiat Isot 2021;
176:109858. [PMID:
34332426 DOI:
10.1016/j.apradiso.2021.109858]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 06/23/2021] [Accepted: 07/06/2021] [Indexed: 10/20/2022]
Abstract
New half-life values for isomeric states in 237Np, 233Pa and 227Ac were measured by means of 4πα(LS)-γ coincidence counting with digital data acquisition. A careful assessment of uncertainties was carried out, and the new results are found to be much more precise than any previous measurement result. The half-lives were found to be T1/2Np237,E=59.54keV=67.86±0.09ns, T1/2Pa233,E=86.47keV=36.44±0.10ns and T1/2Ac227,E=27.37keV=38.56±0.15ns, respectively. A comprehensive study of literature data was undertaken for a new data evaluation that includes the results from this work.
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