Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in <SUP>217,218,219</SUP>At revealed by in-source laser spectroscopy



Barzakh, AE, Cubiss, JG, Andreyev, AN, Seliverstov, MD, Andel, B, Antalic, S, Ascher, P, Atanasov, D, Beck, D, Bieron, J
et al (show 57 more authors) (2019) Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in <SUP>217,218,219</SUP>At revealed by in-source laser spectroscopy. PHYSICAL REVIEW C, 99 (5).

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Abstract

Hyperfine-structure parameters and isotope shifts for the 795-nm atomic transitions in At217,218,219 have been measured at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy technique. Magnetic dipole and electric quadrupole moments, and changes in the nuclear mean-square charge radii, have been deduced. A large inverse odd-even staggering in radii, which may be associated with the presence of octupole collectivity, has been observed. Namely, the radius of the odd-odd isotope At218 has been found to be larger than the average of its even-N neighbors, At217,219. The discrepancy between the additivity-rule prediction and experimental data for the magnetic moment of At218 also supports the possible presence of octupole collectivity in the considered nuclei.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 15 Aug 2019 08:15
Last Modified: 14 Oct 2023 09:35
DOI: 10.1103/PhysRevC.99.054317
Open Access URL: http://doi.org/10.1103/PhysRevC.99.054317
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3051790