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 editorsParr, 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 seriesPhysical Review C

ISSN2469-9985

eISSN2469-9993

Publication year2020

Publication date30/11/2020

Volume102

Issue number5

Article number054335

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1103/physrevc.102.054335

Publication open accessNot open

Publication channel open access

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


Abstract

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.


Keywordsnuclear physics

Free keywordsalpha decay; energy levels and level densities; nuclear structure and decays


Contributing organizations


Ministry reportingYes

Reporting Year2020

JUFO rating2


Last updated on 2024-22-04 at 12:59