A1 Journal article (refereed)
Excited states in 217Ra populated in the α decay of 221Th (2020)

Parr, E., Smith, J. F., Greenlees, P. T., Auranen, K., Chapman, R., Cullen, D. M., Grahn, T., Grocutt, L., Herzáň, A., Herzberg, R.-D., Hodge, D., Jakobsson, U., Julin, R., Juutinen, S., Konki, J., McPeake, C., Mengoni, D., Mistry, A. K., Mulholland, K. F., . . . Uusitalo, J. (2020). Excited states in 217Ra populated in the α decay of 221Th. Physical Review C, 102(5), Article 054335. https://doi.org/10.1103/physrevc.102.054335

JYU authors or editors

Publication details

All authors or editors: Parr, E.; Smith, J. F.; Greenlees, P. T.; Auranen, K.; Chapman, R.; Cullen, D. M.; Grahn, T.; Grocutt, L.; Herzáň, A.; Herzberg, R.-D.; et al.

Journal or series: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Publication year: 2020

Publication date: 30/11/2020

Volume: 102

Issue number: 5

Article number: 054335

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/physrevc.102.054335

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/72983


Fine structure in the α decay of 22190Th, populating excited states in 21788Ra, was studied using αγ-coincidence spectroscopy. Two α-decay branches from 221Th have been newly observed, with Eα(keV)[bα(%)]=7951(8)[0.14(3)] and 8247(3)[1.51(12)], together with three previously known branches. Also, two new states in 217Ra were identified at E = 177 and 227 keV. The ground-state configurations of the odd-A, N = 131 transitional isotones above 208Pb are interpreted from their α-decay fine structure systematics and considered in terms of predictions using spherical shell and reflection-asymmetric models.

Keywords: nuclear physics

Free keywords: alpha decay; energy levels and level densities; nuclear structure and decays

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2

Last updated on 2022-20-09 at 14:13