Lifetime measurement of the first excited 5/2 + state in 133 Cs using NaI(Tl) and LaBr 3 (Ce) detectors

We report a new high-precision lifetime measurement of the first excited 5/2 state of Cs using NaI(Tl) and LaBr (Ce) detectors. The time difference between the coincident decays of two successive states was measured using fast-timing electronics. The 356-keV (1/2 →5/2 ) gamma transition was tagged b...

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Bibliographic Details
Published in:Applied radiation and isotopes 2019-05, Vol.150, p.141
Main Authors: Lugendo, I J, Ahn, J K, Kumwenda, M J, Lee, J W, Hong, B, Hwang, S H
Format: Article
Language:English
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Summary:We report a new high-precision lifetime measurement of the first excited 5/2 state of Cs using NaI(Tl) and LaBr (Ce) detectors. The time difference between the coincident decays of two successive states was measured using fast-timing electronics. The 356-keV (1/2 →5/2 ) gamma transition was tagged by the successive 81-keV (5/2 →7/2 ) transition of Cs. The half-life of the first excited 5/2 Cs state was measured as T =6.283±0.004 (stat.) ±0.011(syst.) ns.
ISSN:1872-9800
DOI:10.1016/j.apradiso.2019.05.027