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In-beam γ-ray spectroscopy of 190Po: First observation of a low-lying prolate band in Po isotopes

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Abstract:

Gamma rays from excited states of 190Po have been observed using the Jurosphere Ge-detector array coupled to the RITU gas-filled separator. They were associated with a collective band which from spin 4 onwards resembles the prolate rotational bands known in the isotones 188Pb and 186Hg. This indicates that in 190Po the prolate configuration becomes yrast above I = 2. The experimental results are interpreted in a two-band mixing calculation and are in agreement with α-decay data and potential energy surface calculations.

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Authors and Affiliations

  1. Instituut voor Kern- en Stralingsfysica, University of Leuven, Belgium, , , , , , BE

    K. Van de Vel, A.N. Andreyev, M. Huyse & P. Van Duppen

  2. Oliver Lodge Laboratory, Department of Physics, University of Liverpool, UK, , , , , , GB

    R.D. Page

  3. Department of Physics, University of Jyväskylä, Finland, , , , , , FI

    H. Kettunen, P.T. Greenlees, P. Jones, R. Julin, S. Juutinen, H. Kankaanpää, A. Keenan, P. Kuusiniemi, M. Leino, M. Muikku, P. Nieminen, P. Rahkila & J. Uusitalo

  4. Department of Physics, University of Helsinki, Finland, , , , , , FI

    K. Eskola

  5. DAPNIA/SPhN, CEA Saclay, France, , , , , , FR

    A. Hürstel & Y. Le Coz

  6. Department of Physics and Astronomy, Rutgers University, USA, , , , , , US

    M.B. Smith

  7. Department of Physics, Royal Institute of Technology, Stockholm, Sweden, , , , , , SE

    R. Wyss

Authors
  1. K. Van de Vel
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  2. A.N. Andreyev
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  3. R.D. Page
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  4. H. Kettunen
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  5. P.T. Greenlees
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  6. P. Jones
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  7. R. Julin
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  8. S. Juutinen
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  9. H. Kankaanpää
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  10. A. Keenan
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  11. P. Kuusiniemi
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  12. M. Leino
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  13. M. Muikku
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  14. P. Nieminen
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  15. P. Rahkila
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  16. J. Uusitalo
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  17. K. Eskola
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  18. A. Hürstel
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  19. M. Huyse
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  20. Y. Le Coz
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  21. M.B. Smith
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  22. P. Van Duppen
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  23. R. Wyss
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Additional information

Received: 10 January 2003 / Accepted: 19 February 2003 / Published online: 7 May 2003

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Van de Vel, K., Andreyev, A., Page, R. et al. In-beam γ-ray spectroscopy of 190Po: First observation of a low-lying prolate band in Po isotopes. Eur Phys J A 17, 167–171 (2003). https://doi.org/10.1140/epja/i2003-10002-x

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  • DOI: https://doi.org/10.1140/epja/i2003-10002-x

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