Experimental study of isomeric intruder 1/2(+) states in At-197,At-203

Auranen, K, Uusitalo, J, Juutinen, S, Badran, H, Bisso, F Defranchi, Cox, D, Grahn, T, Greenlees, PT, Herzan, A, Jakobsson, U
et al (show 15 more authors) (2017) Experimental study of isomeric intruder 1/2(+) states in At-197,At-203. PHYSICAL REVIEW C, 95 (4).

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A newly observed isomeric intruder -+ state [T-=3.5(6)ms] is identified in At203 using a gas-filled recoil separator and fusion-evaporation reactions. The isomer is depopulated through a cascade of E3 and mixed M1/E2 transitions to the 9/2- ground state, and it is suggested to originate from the π(s-)-1 configuration. In addition, the structures above the -+ state in At203 and At197 are studied using in-beam γ-ray spectroscopy, recoil-decay tagging, and recoil-isomer decay tagging methods. The -+ state is fed from 3/2+ and 5/2+ states, and the origin of these states are discussed.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 15 Mar 2018 11:24
Last Modified: 19 Jan 2023 06:38
DOI: 10.1103/PhysRevC.95.044311
Open Access URL: http://urn.fi/URN:NBN:fi:jyu-201705022136
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3019059