20μs isomeric state in doubly odd 61134Pm

D. M. Cullen, P. J R Mason, S. V. Rigby, C. Scholey, S. Eeckhaudt, T. Grahn, P. T. Greenlees, U. Jakobsson, P. M. Jones, R. Julin, S. Juutinen, S. Ketelhut, A. M. Kishada, M. Leino, A. P. Leppänen, K. Mäntyniemi, P. Nieminen, M. Nyman, J. Pakarinen, P. PeuraP. Rahkila, J. Sarén, J. Sorri, J. Uusitalo, B. J. Varley, M. Venhart

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Recoil-isomer tagging at the Accelerator Laboratory of the University of Jyväskylä has been used to establish the isomeric nature of a known (7-) excited state in the doubly odd nucleus Pm134. The isomeric state was determined to have a half-life of 20(1) μs and was populated from the decay of a πh11/2'-Fe54,2α3pn) reaction at 305 and 315 MeV. The isomer decays by a 71-keV transition that provides an intermediate step in linking the established Pm134 high-spin level scheme to the lower-spin states observed from the β decay of Sm134. Electron-conversion analysis for the 71-keV γ-ray transition reveals that it is of E1 character and its small reduced-transition probability suggests that Pm134 may have a nuclear shape more rigid than that of the neighboring nuclei. © 2009 The American Physical Society.
    Original languageEnglish
    Article number024303
    JournalPhysical Review C - Nuclear Physics
    Volume80
    Issue number2
    DOIs
    Publication statusPublished - 7 Aug 2009

    Keywords

    • TOTAL DATA READOUT
    • TRANSITION PROBABILITIES
    • ROTATIONAL BANDS
    • BETA-DECAY
    • NUCLEI
    • SPECTROSCOPY
    • PR-132
    • IDENTIFICATION
    • SYSTEMATICS
    • ISOTOPES

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