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Charge radii of thallium isotopes near the 𝑁=126 shell closure (2024)

IDS Collaboration. (2024). Charge radii of thallium isotopes near the 𝑁=126 shell closure. Physical Review C, 110(3), Article 034315. https://doi.org/10.1103/physrevc.110.034315

JYU-tekijät tai -toimittajat

Illana Sison, Andres
Pakarinen, Janne

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: IDS Collaboration

Lehti tai sarja: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Julkaisuvuosi: 2024

Ilmestymispäivä: 13.09.2024

Volyymi: 110

Lehden numero: 3

Artikkelinumero: 034315

Kustantaja: American Physical Society (APS)

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1103/physrevc.110.034315

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/97116

Tiivistelmä

The changes in the mean-squared charge radius of 209Tl𝑔 (𝑁=128) and 207Tl𝑚 (𝑁=126) relative to 205Tl have been measured for the first time using the in-source laser resonance-ionization spectroscopy technique with the Laser Ion Source and Trap (LIST) at ISOLDE (CERN). The application of the LIST suppresses the dominant background from isobaric francium isotopes and allows access to thallium nuclides with 𝐴⩾207. The characteristic kink in the charge radii at the 𝑁=126 neutron shell closure, as well as the odd-even effect similar to that in the adjacent bismuth, lead, and mercury isotopic chains, have been observed. The self-consistent theory of finite Fermi systems based on the energy density functional by Fayans et al. reproduces the behavior of charge radii in these isotopic chains near 𝑁=126. The comparison with calculations in the framework of the relativistic mean field (RMF) approach is also presented. In the case of the Fayans functional it is a specific form of pairing interaction with the dependence on the density gradient that is essential to provide agreement with the experimental charge radii. In particular, the kink is reproduced without the inversion of 𝑔9/2 and 𝑖11/2 neutron single-particle states, which is a prerequisite to correctly describe the kink in the RMF models.

YSO-asiasanat: ydinfysiikka

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OKM-raportointi: Kyllä

Alustava JUFO-taso: 2