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Investigation of neutron-deficient tungsten isotopes168−174W

  • Nuclear Structure and Reactions
  • Published:
Zeitschrift für Physik A Atomic Nuclei

Abstract

The decays of168−174W were observed in the reactions of36Ar and40Ar beams with enriched targets of136BaF2 and138BaF2. The measured half-lives are 53(2) s, 76(6) s, 2.42(4) min, 2.38(4) min, 6.6(9) min, 6.3(4) min, and 35.3 (5) min, respectively. Decay schemes were derived from theγ − and X-ray coincidence data. Spin assignments of ground- and excited states are discussed within experimental level systematics and compared with the results of microscopic-macroscopic model calculations. Excitation energies of modeled one-quasiparticle states were found in reasonable agreement with the experimental data. Allowed unhindered beta decay from the 5/2− [523] to the 7/2− [523] configuration was identified in171W and this transition is also proposed for the decays of the even-even isotopes168, 170W.

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Authors and Affiliations

  1. II. Physikalisches Institut der Universität, Göttingen, Federal Republic of Germany

    F. Meissner, W. -D. Schmidt-Ott, V. Freystein, T. Hild, E. Runte & H. Salewski

  2. Hahn-Meitner-Institut, Berlin, Germany

    R. Michaelsen

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  1. F. Meissner
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  2. W. -D. Schmidt-Ott
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  3. V. Freystein
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  4. T. Hild
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  5. E. Runte
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  6. H. Salewski
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  7. R. Michaelsen
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Additional information

The work has been supported by the Federal Ministry for Research and Technology (BMFT) under contract number 06GÖ456

We like to thank the target laboratory of the GSI Darmstadt for the help in preparing the barium targets.

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Meissner, F., Schmidt-Ott, W.D., Freystein, V. et al. Investigation of neutron-deficient tungsten isotopes168−174W. Z. Physik A - Atomic Nuclei 337, 45–56 (1990). https://doi.org/10.1007/BF01283937

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  • DOI: https://doi.org/10.1007/BF01283937

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