Sudden change in the nuclear charge distribution of very light gold isotopes
1987; American Physical Society; Volume: 58; Issue: 15 Linguagem: Inglês
10.1103/physrevlett.58.1516
ISSN1092-0145
AutoresK. Wallmeroth, G. Bollen, Asmus Ougaard Dohn, P. Egelhof, John A. Gruner, F. Lindenlauf, U. Krönert, Juan Campos, A. Rodriguez Yunta, M. J. G. Borge, A. Venugopalan, J.L. Wood, Robert B. Moore, H.‐J. Kluge,
Tópico(s)Advanced Chemical Physics Studies
ResumoOn-line resonance-ionization mass spectrometry has been applied to determine the isotope shift and hyperfine structure of $^{185\mathrm{\ensuremath{-}}189}\mathrm{Au}$ and $^{189\mathrm{m}}\mathrm{Au}$ in the 6s ${}^{2}$${S}_{1/2}$\ensuremath{\rightarrow}6p ${}^{2p}$${}_{1/2}$ (\ensuremath{\lambda}=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 $^{187}\mathrm{Au}$ and $^{186}\mathrm{Au}$, which is interpreted as an onset of strong deformation of \ensuremath{\beta}\ensuremath{\approxeq}0.25 in $^{186}\mathrm{Au}$ and $^{185}\mathrm{Au}$.
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