Parr, E, Smith, JF, Greenlees, PT, Butler, PA, Auranen, K, Chapman, R, Cox, DM, Cullen, DM, Gaffney, LP, Grahn, T et al (show 35 more authors)
(2022)
Single-particle states and parity doublets in odd-Z Ac-221 and Pa-225 from alpha-decay spectroscopy.
PHYSICAL REVIEW C, 105 (3).
034303-.
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Parr_Main_text_including_figures_Ref_Corr_2.pdf - Author Accepted Manuscript Download (654kB) | Preview |
Abstract
Low-lying states in the odd-Z isotopes Ac13289221 and Pa13491225 have been studied using α-particle and αγ-coincidence spectroscopy in the Pa225→Ac221→Fr217 decay chain. Ground-state spin and parity assignments of Iπ = 5/2- are proposed for both Ac221 and Pa225, with the odd proton occupying the ω = 5/2 orbital of the quadrupole-octupole deformed shell model in both nuclei. In Ac221, excited states in the bands based on the ω = 5/2 and ω = 3/2 orbitals have been identified, including proposed parity-doublet states. The results suggest that reflection-asymmetric deformation of the ground state persists in the odd-A members of the isotope chains down to N = 132 for Ac and N = 134 for Pa, before reaching the transitional region at N = 130.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 5106 Nuclear and Plasma Physics, 5110 Synchrotrons and Accelerators, 51 Physical Sciences |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 30 Aug 2022 09:17 |
| Last Modified: | 21 Jun 2024 03:36 |
| DOI: | 10.1103/PhysRevC.105.034303 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3162807 |
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