Single-particle states and parity doublets in odd- Z Ac 221 and Pa 225 from α -decay spectroscopy
(2022) In Physical Review C 105(3).- 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 =... (More)
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.
(Less)
- author
- organization
- publishing date
- 2022-03
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review C
- volume
- 105
- issue
- 3
- article number
- 034303
- publisher
- American Physical Society
- external identifiers
-
- scopus:85126722252
- ISSN
- 2469-9985
- DOI
- 10.1103/PhysRevC.105.034303
- language
- English
- LU publication?
- yes
- id
- 49cb9a66-97b9-4d24-a681-490a0a2e5a21
- date added to LUP
- 2022-06-09 10:53:47
- date last changed
- 2022-07-05 15:45:14
@article{49cb9a66-97b9-4d24-a681-490a0a2e5a21, abstract = {{<p>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.</p>}}, author = {{Parr, E. and Smith, J. F. and Greenlees, P. T. and Butler, P. A. and Auranen, K. and Chapman, R. and Cox, D. M. and Cullen, D. M. and Gaffney, L. P. and Grahn, T. and Gregor, E. T. and Grocutt, L. and Herzáň, A. and Herzberg, R. D. and Hodge, D. and Jakobsson, U. and Julin, R. and Juutinen, S. and Keatings, J. M. and Konki, J. and Leino, M. and McKee, P. P. and McPeake, C. and Mengoni, D. and Mistry, A. K. and Singh, B. S.Nara and O'Neill, G. G. and Pakarinen, J. and Papadakis, P. and Partanen, J. and Peura, P. and Rahkila, P. and Ruotsalainen, P. and Sandzelius, M. and Sarén, J. and Scheck, M. and Scholey, C. and Siciliano, M. and Smolen, M. and Sorri, J. and Spagnoletti, P. and Spohr, K. M. and Stolze, S. and Taylor, M. J. and Uusitalo, J.}}, issn = {{2469-9985}}, language = {{eng}}, number = {{3}}, publisher = {{American Physical Society}}, series = {{Physical Review C}}, title = {{Single-particle states and parity doublets in odd- Z Ac 221 and Pa 225 from α -decay spectroscopy}}, url = {{http://dx.doi.org/10.1103/PhysRevC.105.034303}}, doi = {{10.1103/PhysRevC.105.034303}}, volume = {{105}}, year = {{2022}}, }