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Alpha-decay study of 218U; a search for the sub-shell closure at Z = 92

  • ENAM 2004
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Abstract.

Neutron-deficient uranium isotopes were studied via α spectroscopic methods. A low-lying α-decaying isomeric state was found in 218U. The new isomeric state was assigned spin and parity Iπ=8+. The isomer decays by α emission with an energy E = 10678(17)keV and with a half-life T1/2 = (0.56+0.26-0.14)ms. The known alpha-decay properties of the ground state of 218U was measured with improved statistics. The ground-state α-decay has an energy E = 8612(9)keV and a half-life T1/2 = (0.51+0.17-0.10)ms.

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Authors and Affiliations

  1. Department of Physics, University of Jyväskylä, P.O. Box 35, FIN-40351, Jyväskylä, Finland

    A. -P. Leppänen, J. Uusitalo, S. Eeckhaudt, T. Enqvist, T. Grahn, P. T. Greenlees, P. Jones, R. Julin, S. Juutinen, H. Kettunen, P. Kuusiniemi, M. Leino, P. Nieminen, J. Pakarinen, J. Perkowski, P. Rahkila & C. Scholey

  2. Department of Physics, University of Helsinki, FIN-00014, Helsinki, Finland

    K. Eskola

  3. GSI, Planckstr. 1, D-64291, Darmstadt, Germany

    F. P. Heßberger

  4. Department of Physics, University of Copenhagen, Copenhagen, Denmark

    G. Sletten

Authors
  1. A. -P. Leppänen
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  2. J. Uusitalo
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  3. S. Eeckhaudt
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  4. T. Enqvist
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  5. K. Eskola
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  6. T. Grahn
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  7. F. P. Heßberger
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  8. P. T. Greenlees
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  9. P. Jones
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  10. R. Julin
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  11. S. Juutinen
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  12. H. Kettunen
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  13. P. Kuusiniemi
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  14. M. Leino
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  15. P. Nieminen
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  16. J. Pakarinen
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  17. J. Perkowski
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  18. P. Rahkila
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  19. C. Scholey
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  20. G. Sletten
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Leppänen, A.P., Uusitalo, J., Eeckhaudt, S. et al. Alpha-decay study of 218U; a search for the sub-shell closure at Z = 92. Eur. Phys. J. A 25 (Suppl 1), 183–184 (2005). https://doi.org/10.1140/epjad/i2005-06-116-y

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  • DOI: https://doi.org/10.1140/epjad/i2005-06-116-y

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