Lifetime measurement of the first excited 5/2+ state in 133Cs using NaI(Tl) and LaBr3(Ce) detectors

I. J. Lugendo, J. K. Ahn, M. J. Kumwenda, J. W. Lee, B. Hong, S. H. Hwang

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    1 Citation (Scopus)

    Abstract

    We report a new high-precision lifetime measurement of the first excited 5/2+ state of 133Cs using NaI(Tl) and LaBr3(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 133Cs. The half-life of the first excited 5/2+ 133Cs state was measured as T1/2=6.283±0.004 (stat.) ±0.011(syst.) ns.

    Original languageEnglish
    Pages (from-to)141-145
    Number of pages5
    JournalApplied Radiation and Isotopes
    Volume150
    DOIs
    Publication statusPublished - 2019 Aug

    Bibliographical note

    Funding Information:
    We are greatly indebted to J.M. Lee at KRISS for providing a 133 Ba radioactive source encapsulated in a thin film. This work was supported in part by the National Research Foundation of Korea and Korea University .

    Publisher Copyright:
    © 2019

    Keywords

    • Cs
    • LaBr(Ce) scintillator
    • Lifetime
    • NaI(Tl) scintillator

    ASJC Scopus subject areas

    • Radiation

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