Goodacre, T Day, Afanasjev, AV, Barzakh, AE, Marsh, BA, Sels, S, Ring, P, Nakada, H, Andreyev, AN, Van Duppen, P, Althubiti, NA et al (show 34 more authors)
(2021)
Laser Spectroscopy of Neutron-Rich <SUP>207,208</SUP>Hg Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the <i>N</i>=126 Shell Closure.
PHYSICAL REVIEW LETTERS, 126 (3).
032502-.
|
Text
Hg-NR-Letter.pdf - Author Accepted Manuscript Download (2MB) | Preview |
Abstract
The mean-square charge radii of ^{207,208}Hg (Z=80, N=127, 128) have been studied for the first time and those of ^{202,203,206}Hg (N=122, 123, 126) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic kink in the charge radii at the N=126 neutron shell closure has been revealed, providing the first information on its behavior below the Z=82 proton shell closure. A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and nonrelativistic Hartree-Fock-Bogoliubov approaches, considering both the new mercury results and existing lead data. Contrary to previous interpretations, it is demonstrated that both the kink at N=126 and the odd-even staggering (OES) in its vicinity can be described predominately at the mean-field level and that pairing does not need to play a crucial role in their origin. A new OES mechanism is suggested, related to the staggering in the occupation of the different neutron orbitals in odd- and even-A nuclei, facilitated by particle-vibration coupling for odd-A nuclei.
| Item Type: | Article |
|---|---|
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 24 Aug 2021 07:42 |
| Last Modified: | 11 Oct 2023 22:45 |
| DOI: | 10.1103/PhysRevLett.126.032502 |
| Open Access URL: | https://doi.org/10.1103/PhysRevLett.126.032502 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3134490 |
Dimensions
Dimensions
