A1 Journal article (refereed)
Delayed or absent π(h11/2)2 alignment in 111Xe (2020)


Capponi, L.; Smith, J. F.; Ruotsalainen, P.; Scholey, C.; Rahkila, P.; Bianco, L.; Boston, A. J.; Boston, H.; Cullen, D. M.; Derkx, X.; Drummond, M. C.; Grahn, T.; Greenlees, P. T.; Grocutt, L. et al. (2020). Delayed or absent π(h11/2)2 alignment in 111Xe. Physical Review C, 101 (1), 014313. DOI: 10.1103/PhysRevC.101.014313


JYU authors or editors


Publication details

All authors or editors: Capponi, L.; Smith, J. F.; Ruotsalainen, P.; Scholey, C.; Rahkila, P.; Bianco, L.; Boston, A. J.; Boston, H.; Cullen, D. M.; Derkx, X.; et al.

Journal or series: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Publication year: 2020

Volume: 101

Issue number: 1

Article number: 014313

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevC.101.014313

Open Access: Publication channel is not openly available

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/67567


Abstract

Excited states have been identified in the very neutron-deficient N = Z + 3 nucleus 111Xe for the first time, using the 58Ni(58Ni, αn) heavy-ion fusion-evaporation reaction. γ -ray transitions have been unambiguously assigned to 111Xe by correlation with the characteristic 111Xe → 107Te → 103Sn α-decay chain using the method of recoil-decay tagging. Inspection of γ γ -coincidence data has shown that five of the transitions form a rotational-like sequence. Excitation-energy systematics suggest that the sequence could be the favored signature partner of a band built on an h11/2 neutron. Aligned angular momenta of states in the band have been compared to analogous bands in neighboring xenon isotopes. The aligned angular momenta for the 111Xe band are constant over the range of observed rotational frequencies, suggesting that the first π(h11/2 ) 2 alignment is either delayed or absent. It is speculated that the alignment of h11/2 protons in the presence of neutrons in near-identical h11/2 orbitals may be affected by neutron-proton interactions or by the onset of octupole correlations.


Keywords: nuclear physics

Free keywords: collective levels; nuclear structure and decays


Contributing organizations


Ministry reporting: Yes

Reporting Year: 2020

Preliminary JUFO rating: 2


Last updated on 2020-18-08 at 13:00