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Level structure of170Er observed in the decay of the 2.76 min170Ho

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

TheΒ −-decay of the longer-lived170Ho isomer produced through the170Er(n, p)170Ho reaction has been investigated by using a versastile detector and coincidence equipment. The half-life andΒ −-decay energy were determined to beT 1/2=2.76±0.05 min andQ β =3.85±0.15 MeV, respectively. In addition to the ground state band and some higher energy levels, the proposed level scheme of170Er contains 11 states between 1.0 and 1.6 MeV (6 new ones), which are connected mutually by previously unknown low-energy transitions. Spin and/or parity assignments based mainly on coincidence data and multipolarity determinations are suggested for most of these states. By using systematic considerations and the nuclear projection model calculations several bands withK≧2 can be assigned tentatively. As a side result the half-life of169Ho was determined to be 4.7 ±0.2 min.

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Authors and Affiliations

  1. Department of Physics, University of Helsinki, Helsinki, Finland

    R. Katajanheimo & T. Tuurnala

  2. Department of Physics, University of Jyväskylä, Jyväskylä, Finland

    E. Hammarén

Authors
  1. R. Katajanheimo
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  2. T. Tuurnala
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  3. E. Hammarén
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Additional information

We wish to thank Tuomo Honkaranta for help in the projection model calculations and Antti Siivola for some valuable remarks.

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Katajanheimo, R., Tuurnala, T. & Hammarén, E. Level structure of170Er observed in the decay of the 2.76 min170Ho. Z Physik A 286, 57–63 (1978). https://doi.org/10.1007/BF01434613

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  • DOI: https://doi.org/10.1007/BF01434613

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