Magnetic moments of thallium isotopes in the vicinity of magic N = 126

• DOI: 10.1016/j.physletb.2024.138452
• Publication Date: 2024-01-17T16:46:32Z
• Authors: Z. Yue; A.N. Andreyev; A.E. Barzakh; I.N. Borzov; J.G. Cubiss; A. Algora; M. Au; M. Balogh; S. Bara; R.A. Bark; C. Bernerd; M.J.G. Borge; D. Brugnara; K. Chrysalidis; T.E. Cocolios; H. De Witte; Z. Favier; L.M. Fraile; H.O.U. Fynbo; A. Gottardo; R. Grzywacz; R. Heinke; A. Illana; P.M. Jones; D.S. Judson; A. Korgul; U. Köster; M. Labiche; L. Le; R. Lica; M. Madurga; N. Marginean; B. Marsh; C. Mihai; E. Nácher; C. Neacsu; C. Nita; B. Olaizola; J.N. Orce; C.A.A. Page; R.D. Page; J. Pakarinen; P. Papadakis; G. Penyazkov; A. Perea; M. Piersa-Siłkowska; Zs. Podolyák; S.D. Prosnyak; E. Reis; S. Rothe; M. Sedlak; L.V. Skripnikov; C. Sotty; S. Stegemann; O. Tengblad; S.V. Tolokonnikov; J.M. Udías; P. Van Duppen; N. Warr; W. Wojtaczka
• Keywords: Thallium; Isobaric process

The magnetic dipole moments (μ) of 209Tlg (N=128) and 207Tlm (N=126) have been measured for the first time using in-source laser resonance-ionization spectroscopy technique with Laser Ion Source Trap (LIST) at ISOLDE (CERN). application LIST suppresses usually overwhelming background isobaric francium isotopes allows access to heavy thallium A⩾207. self-consistent theory finite Fermi systems based on energy density functional by Fayans et al. well describes N dependence μ 1/2+ ground states, as 11/2− isomeric states in europium, gold isotopes. inclusion particle-vibration coupling leads a better agreement between experiment μ(Tlg, Iπ=1/2+). It is shown that beyond mean-field contributions cannot be neglected least Iπ=1/2+.