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The βdecay of 147Cs to 147Ba

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Abstract.

The β--decay of 147Cs to 147Ba has been studied by means of γ- and X-ray spectroscopy. A new level scheme of 147Ba is significantly modified and extended in comparison to the one previously reported. The Advanced Time-Delayed βγγ(t) method has been applied to measure half-lives of the 46.2 and 85.4 keV levels in 147Ba yielding T 1/2 of 510(80) ps and 370(100) ps, respectively. The lifetime results combined with the deduced internal conversion coefficients allowed to assign M1 multipolarity to three γ transitions. The B(M1) values obtained for the 39.2, 46.2 and 85.4 keV transitions range from 0.017 to 0.043 W.u. and represent typical B(M1) strength in the Ba-Er region. Model calculations using a shell correction approach with the axially deformed Woods-Saxon potential predict for 147Ba an octupole deformed ground state with β3 = 0.11.

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Authors and Affiliations

  1. Department of Detectors and Nuclear Electronics, Sołtan Institute for Nuclear Studies, 05-400, Świerk, Poland

    A. Syntfeld

  2. Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681, Warsaw, Poland

    A. Syntfeld, W. Kurcewicz, K. Gulda, A. Korgul & W. Urban

  3. Department of Radiation Sciences, Uppsala University, 611 82, Nyköping, Sweden

    H. Mach, B. Fogelberg, J. Galy, A. Lindroth & M. Sanchez-Vega

  4. Oliver Lodge Laboratory, University of Liverpool, L69 3BX, Liverpool, UK

    N. Amzal

  5. Department of Nuclear Spectroscopy, Sołtan Institute for Nuclear Studies, 05-400, Świerk, Poland

    W. A. Płóciennik

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  1. A. Syntfeld
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Correspondence to A. Syntfeld.

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D. Schwalm

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Syntfeld, A., Mach, H., Kurcewicz, W. et al. The βdecay of 147Cs to 147Ba. Eur. Phys. J. A 23, 481–490 (2005). https://doi.org/10.1140/epja/i2004-10112-y

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