Excited states in <SUP>217</SUP>Ra populated in the α decay of <SUP>221</SUP>Th



Parr, E, Smith, JF, Greenlees, PT, Auranen, K, Chapman, R, Cullen, DM, Grahn, T, Grocutt, L, Herzan, A, Herzberg, R-D
et al (show 26 more authors) (2020) Excited states in <SUP>217</SUP>Ra populated in the α decay of <SUP>221</SUP>Th. PHYSICAL REVIEW C, 102 (5). 054335-.

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Abstract

Fine structure in the +¦ decay of Th90221, populating excited states in Ra88217, was studied using +¦+¦-coincidence spectroscopy. Two +¦-decay branches from Th221 have been newly observed, with E+¦(keV)[b+¦(%)]=7951(8)[0.14(3)] and 8247(3)[1.51(12)], together with three previously known branches. Also, two new states in Ra217 were identified at E = 177 and 227 keV. The ground-state configurations of the odd-A, N = 131 transitional isotones above Pb208 are interpreted from their +¦-decay fine structure systematics and considered in terms of predictions using spherical shell and reflection-asymmetric models.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5110 Synchrotrons and Accelerators, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 14 Jan 2021 11:47
Last Modified: 21 Jun 2024 03:36
DOI: 10.1103/PhysRevC.102.054335
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3111089