Coulomb excitation of Rn222

Spagnoletti, P, Butler, PA ORCID: 0000-0001-6080-9205, Gaffney, LP ORCID: 0000-0002-2938-3696, Abrahams, K, Bowry, M, Cederkäll, J, Chupp, T, de Angelis, G, De Witte, H, Garrett, PE
et al (show 34 more authors) (2022) Coulomb excitation of Rn222. Physical Review C, 105 (2). 024323-.

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The nature of quadrupole and octupole collectivity in Rn222 was investigated by determining the electric-quadrupole (E2) and octupole (E3) matrix elements using subbarrier, multistep Coulomb excitation. The radioactive Rn222 beam, accelerated to 4.23 MeV/u, was provided by the HIE-ISOLDE facility at CERN. Data were collected in the Miniball γ-ray spectrometer following the bombardment of two targets, Sn120 and Ni60. Transition E2 matrix elements within the ground-state and octupole bands were measured up to 10ℏ and the results were consistent with a constant intrinsic electric-quadrupole moment, 518(11)efm2. The values of the intrinsic electric-octupole moment for the 0+→3- and 2+→5- transitions were found to be respectively 2360-210+300efm3 and 2300-500+300efm3 while a smaller value, 1200-900+500efm3, was found for the 2+→1- transition. In addition, four excited non-yrast states were identified in this work via γ-γ coincidences.

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 21 Mar 2022 09:29
Last Modified: 15 Mar 2024 00:43
DOI: 10.1103/physrevc.105.024323
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