Sudden change in the nuclear charge distribution of very light gold isotopes

K. Wallmeroth, G. Bollen, A. Dohn, P. Egelhof, J. Grüner, F. Lindenlauf, U. Krönert, J. Campos, A. Rodriguez Yunta, M. J. G. Borge, A. Venugopalan, J. L. Wood, R. B. Moore, and H. -J. Kluge
Phys. Rev. Lett. 58, 1516 – Published 13 April 1987
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Abstract

On-line resonance-ionization mass spectrometry has been applied to determine the isotope shift and hyperfine structure of Au185189 and Au189m in the 6s 2S1/2→6p 2p1/2 (λ=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-color, two-step resonant photoionization process, detected and mass-selected by time of flight. A drastic change of the nuclear charge radius was observed between Au187 and Au186, which is interpreted as an onset of strong deformation of β≊0.25 in Au186 and Au185.

  • Received 29 December 1986

DOI:https://doi.org/10.1103/PhysRevLett.58.1516

©1987 American Physical Society

Authors & Affiliations

K. Wallmeroth, G. Bollen, A. Dohn, P. Egelhof, J. Grüner, F. Lindenlauf, and U. Krönert

  • Institut für Physik, Universitat Mainz, D-6500 Mainz, Federal Republic of Germany

J. Campos and A. Rodriguez Yunta

  • Universidad Complutense and Junta de Energía Nuclear, Madrid, Spain

M. J. G. Borge and A. Venugopalan

  • ISOLDE Collaboration, European Organization for Nuclear Research (CERN), CH-1211 Geneva, Switzerland

J. L. Wood

  • School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332

R. B. Moore

  • McGill University, Montreal, Canada H3A 2B2

H. -J. Kluge

  • Institut für Physik, Universität Mainz, D-6500 Mainz, Federal Republic of Germany and ISOLDE Collaboration, European Organization for Nuclear Research (CERN), CH-1211 Geneva, Switzerland

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Vol. 58, Iss. 15 — 13 April 1987

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