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Nuclear shape transition in neutron-deficient gold isotopes

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Abstract

On-line resonance ionization mass spectrometry has been applied to determine the isotope shift and hyperfine structure of185–189Au and tne I=11/2 isomer of189Au in the 6s2S1/2 → 6p2P1/2λ=268 nm) transition. The Au atoms were obtained as daughters of mass-separated Hg isotopes produced at the ISOLDE facility at CERN, ionized by a three-step resonant photoionization process, detected and mass-selected by time of flight. A drastic change of the nuclear charge radius was observed between187Au and186Au, which is interpreted as an onset of strong deformation of β2 ≈ 0.25 in186Au and185Au.

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Authors and Affiliations

  1. Universität Mainz, Mainz, Fed. Rep. Germany

    K. Wallmeroth, G. Bollen, A. Dohn, P. Egelhof, J. Grüner, H. -J. Kluge, U. Krönert & F. Lindenlauf

  2. CERN, Geneva, Switzerland

    M. J. G. Borge, H. -J. Kluge & A. Venugopalan

  3. Universidad Complutense and J.E.N., Madrid, Spain

    M. J. G. Borge, J. Campos & A. Rodriguez

  4. McGill University, Montreal, Canada

    R. B. Moore

  5. Georgia Institute of Technology, Atlanta, USA

    J. L. Wood

  6. Bhabha Atomic Research Center, Bombay, India

    A. Venugopalan

Authors
  1. K. Wallmeroth
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  2. G. Bollen
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  3. M. J. G. Borge
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  4. J. Campos
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  5. A. Dohn
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  6. P. Egelhof
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  7. J. Grüner
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  8. H. -J. Kluge
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  9. U. Krönert
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  10. F. Lindenlauf
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  11. R. B. Moore
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  12. A. Rodriguez
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  13. A. Venugopalan
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  14. J. L. Wood
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Consortia

ISOLDE Collaboration

Additional information

This work has been supported by the Bundesministerium für Forschung und Technologie. One of us, J. Wood was supported in part by the U.S. Department of Energy, Contract DE-AS05-80 ER 10599.

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Wallmeroth, K., Bollen, G., Borge, M.J.G. et al. Nuclear shape transition in neutron-deficient gold isotopes. Hyperfine Interact 34, 21–24 (1987). https://doi.org/10.1007/BF02072675

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  • DOI: https://doi.org/10.1007/BF02072675

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