A1 Journal article (refereed)
Single-particle states and parity doublets in odd-Z 221Ac and 225Pa from α-decay spectroscopy (2022)


Parr, E., Smith, J. F., Greenlees, P. T., Butler, P. A., Auranen, K., Chapman, R., Cox, D. M., Cullen, D. M., Gaffney, L. P., Grahn, T., Gregor, E. T., Grocutt, L., Herzáň, A., Herzberg, R.-D., Hodge, D., Jakobsson, U., Julin, R., Juutinen, S., Keatings, J. M., . . . Uusitalo, J. (2022). Single-particle states and parity doublets in odd-Z 221Ac and 225Pa from α-decay spectroscopy. Physical Review C, 105(3), Article 034303. https://doi.org/10.1103/PhysRevC.105.034303


JYU authors or editors


Publication details

All authors or editorsParr, E.; Smith, J. F.; Greenlees, P. T.; Butler, P. A.; Auranen, K.; Chapman, R.; Cox, D. M.; Cullen, D. M.; Gaffney, L. P.; Grahn, T.; et al.

Journal or seriesPhysical Review C

ISSN2469-9985

eISSN2469-9993

Publication year2022

Publication date02/03/2022

Volume105

Issue number3

Article number034303

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1103/PhysRevC.105.034303

Publication open accessNot open

Publication channel open access

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/80652


Abstract

Low-lying states in the odd-Z isotopes 22189Ac132 and 22591Pa134 have been studied using α-particle and αγ-coincidence spectroscopy in the 225Pa→221Ac→217Fr decay chain. Ground-state spin and parity assignments of Iπ = 5/2− are proposed for both 221Ac and 225Pa, with the odd proton occupying the Ω = 5/2 orbital of the quadrupole-octupole deformed shell model in both nuclei. In 221Ac, 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.


Keywordsnuclear physics


Contributing organizations


Ministry reportingYes

Reporting Year2022

JUFO rating2


Last updated on 2024-10-03 at 17:55