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

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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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Correspondence to M. Seliverstov.

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Seliverstov, M., Andreyev, A., Barré, N. et al. Study of the neutron deficient 182–190Pb isotopes by simultaneous atomic- and nuclear-spectroscopy. Hyperfine Interact 171, 225–231 (2006). https://doi.org/10.1007/s10751-006-9486-z

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  • DOI: https://doi.org/10.1007/s10751-006-9486-z

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