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

I. J. Lugendo, Jung Keun Ahn, M. J. Kumwenda, J. W. Lee, Byungsik Hong, S. H. Hwang

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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 1

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Keywords

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

ASJC Scopus subject areas

  • Radiation

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