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Study of the neutron deficient $^{182–190}$Pb isotopes by simultaneous atomic- and nuclear-spectroscopy

Abstract : Mean-square charge radii and magnetic moments have been measured for the neutron deficient lead isotopes, 182–190Pb. The measurement was performed at the ISOLDE online mass separator, using the in-source resonance ionization spectroscopy technique. The wavelength of the first excitation step for the resonance ionization laser ion source (RILIS) was scanned over the resonance(s) whilst the α- and γ-ray spectra from the decay of the Pb isotopes were recorded as a function of the wavelength. The isotope shift and, in the case of odd-A isotopes, the hyperfine splitting were deduced. The rms-charge radii of the very neutron deficient Pb isotopes follow the smooth trend of the heavier isotopes. This finding indicates a spherical shape for the lead ground states at the neutron mid-shell (N = 104), where the excitation energy of the oblate 0+ state in the even isotopes reaches its minimum.
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http://hal.in2p3.fr/in2p3-00185647
Contributor : Lpsc Bibliotheque <>
Submitted on : Tuesday, November 6, 2007 - 3:34:35 PM
Last modification on : Thursday, November 19, 2020 - 12:58:54 PM

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M. Seliverstov, A. Andreyev, N. Barré, H. de Witte, D. Fedorov, et al.. Study of the neutron deficient $^{182–190}$Pb isotopes by simultaneous atomic- and nuclear-spectroscopy. Hyperfine Interactions, Springer Verlag, 2006, 171, pp.225-231. ⟨10.1007/s10751-006-9486-z⟩. ⟨in2p3-00185647⟩

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