Charge radii, moments and masses of mercury isotopes across the N = 126 shell closure

Abstract

Combining laser spectroscopy in a Versatile Arc Discharge and Laser Ion Source, with Penning-trap mass spectrometry at the CERN-ISOLDE facility, this work reports on mean-square charge radii of neutron-rich mercury isotopes across the $N=126$ shell closure, the electromagnetic moments of ${}^{207}$Hg and more precise mass values of ${}^{206-208}$Hg. The odd-even staggering (OES) of the mean square charge radii and the kink at $N=126$ are analyzed within the framework of covariant density functional theory (CDFT), with comparisons between different functionals to investigate the dependence of the results on the underlying single-particle structure. The observed features are defined predominantly in the particle-hole channel in CDFT, since both are present in the calculations without pairing. However, the magnitude of the kink is still affected by the occupation of the $1i_{11/2}$ and $2g_{9/2}$ orbitals with a dependence on the relative energies as well as pairing.

20 pages, 12 figures, Phys. Rev. C in press

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Cited by in corpus (5)

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• Comparative study on charge radii and their kinks at magic numbers
• Pairing core swelling effect in Pb isotopes at $N>126$
• Preformation Probability and Kinematics of Clusters Emission yielding Pb-daughters