Laser Spectroscopy of Neutron-Rich $^{207,208}$Hg Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the $N=126$ Shell Closure
- Day Goodacre, T.
- Afanasjev, A.V.
- Barzakh, A.E.
- Marsh, B.A.
- Sels, S.
- Ring, P.
- Nakada, H.
- Andreyev, A.N.
- Van Duppen, P.
- Althubiti, N.A.
- Andel, B.
- Atanasov, D.
- Billowes, J.
- Blaum, K.
- Cocolios, T.E.
- Cubiss, J.G.
- Farooq-Smith, G.J.
- Fedorov, D.V.
- Fedosseev, V.N.
- Flanagan, K.T.
- Gaffney, L.P.
- Ghys, L.
- Huyse, M.
- Kreim, S.
- Lunney, D.
- Lynch, K.M.
- Manea, V.
- Martinez Palenzuela, Y.
- Molkanov, P.L.
- Rosenbusch, M.
- Rossel, R.E.
- Rothe, S.
- Schweikhard, L.
- Seliverstov, M.D.
- Spagnoletti, P.
- Van Beveren, C.
- Veinhard, M.
- Verstraelen, E.
- Welker, A.
- Wendt, K.
- Wienholtz, F.
- Wolf, R.N.
- Zadvornaya, A.
- Zuber, K.
DOIAbstract
International audienceThe mean-square charge radii of Hg207,208 (Z=80, N=127, 128) have been studied for the first time and those of Hg202,203,206 (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-ev...
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