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Closed Access item Nuclear shape transition in light gold isotopes

Authors:Wallmeroth, K.
Bollen, G.
Dohn, A.
Egelhof, P.
Krönert, U.
García Borge, María José
Campos, J.
Rodríguez Yunta, A.
Heyde, K.
De Coster, C.
Wood, J. L.
Kluge, H.-J.
[ISOLDE Collaboration]
Keywords:[Radioactivity ] 185,186,187,188,189m,189,190,191,192,193,195Au, Measured hfs, isotope shifts, Deduced μ, rms charge radii, deformation parameters β2, Resonance ionization mass spectroscopy, on-line isotope separator, [Nuclear moments] 197Au
Issue Date:6-Mar-1989
Citation:Nuclear Physics A 493(2): 224-252 (1989)
Abstract:The hyperfine structure and isotope shifts of short-lived gold isotopes with 185 ≤ A ≤190 and the l1-/2 isomer of 189Au have been investigated by application of on-line resonance ionization mass spectroscopy. A detection efficiency of ε = 10-8 for gold atoms was observed at a background of about one event per 1000 laser shots. The deduced charge radii show a drastic change between A=187 and A=186 which is interpreted as an onset of strong deformation (β2 ≈ =0.25) in 186Au and 185Au due to the influence of the πlh(9/2) intruder orbital.
Description:29 pages, 5 tables, 12 figures.-- This publication comprises part of the thesis of K. Wallmeroth.
Publisher version (URL):http://dx.doi.org/10.1016/0375-9474(89)90396-5
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