26–27 Nov 2020
Europe/Zurich timezone

Laser spectroscopy of neutron-rich 207;208Hg isotopes: Illuminating the kink and odd-even staggering in charge radii across the N = 126 shell closure

27 Nov 2020, 09:20
20m

Speaker

Thomas Day Goodacre (TRIUMF (CA))

Description

The mean-square charge radii of $^{207,208}$Hg have been studied by the application of in-source resonance ionization laser spectroscopy, employing the ISOLDE-RILIS together with the Windmill detector and the ISOLTRAP MR-ToF MS. 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 Z = 82. This work was conducted as part of an experimental campaign which also investigated the neutron deficient end of the mercury isotope chain.

A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and non-relativistic 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 defined predominately at the mean-field level.

Primary authors

Thomas Day Goodacre (TRIUMF (CA)) Anatoli Afanasjev (Mississippi State University) Anatoly Barzakh (Petersburg Nuclear Physics Institute) Bruce Marsh (CERN) Simon Sels (Institute for Nuclear and Radiation Physics, KU Leuven, Belgium) Peter Ring (Technical University Munich) Nakada Hitoshi Andrei Andreyev (IKS) Piet Van Duppen (Institute for Nuclear and Radiation Physics, KU Leuven, Belgium) Numa Al Thubiti (Umm Al-Qura University-Unknown-Unknown) Boris Andel (KU Leuven (BE)) Dinko Atanasov (CERN) Jonathan Billowes (University of Manchester (GB)) Klaus Blaum (Max-Planck-Gesellschaft (DE)) Thomas Cocolios (Institute for Nuclear and Radiation Physics, KU Leuven, Belgium) James Cubiss (University of York (GB)) Gregory James Farooq-Smith (KU Leuven (BE)) Dr Dmitry Fedorov (NRC Kurchatov Institute PNPI (RU)) Valentine Fedosseev (CERN) Kieran Flanagan (University of Manchester (GB)) Liam Gaffney ( University of Liverpool ) Lars Herman L Ghys (KU Leuven (BE)) Mark L Huyse (KU Leuven (BE)) Susanne Kreim (CERN) David Lunney (Université Paris-Saclay (FR)) Kara Marie Lynch (CERN) Vladimir Manea (Université Paris-Saclay (FR)) Yisel Martinez Palenzuela Pavel Molkanov (NRC Kurchatov Institute PNPI (RU)) Marco Rosenbusch (RIKEN) Ralf Erik Rossel (Johannes Gutenberg Universitaet Mainz (DE)) Sebastian Rothe (CERN) Lutz Christian Schweikhard (University of Greifswald (DE)) Maxim Seliverstov (Petersburg Nuclear Physics Institut (RU)) Pietro Spagnoletti (UWS) Celine Van Beveren (Katholieke Universiteit Leuven (BE)) Matthieu Veinhard (CERN) Elise Verstraelen (Institute for Nuclear and Radiation Physics, KU Leuven, Belgium) Dr Andree Welker (CERN Fellow) Klaus Wendt (Johannes Gutenberg Universitaet Mainz (DE)) Frank Wienholtz (CERN) Robert Wolf (Max-Planck-Gesellschaft (DE)) Alexandra Zadvornaya Kai Zuber (Technische Universitaet Dresden (DE))

Presentation materials