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Experimental study of isomeric intruder 1/2(+) states in At-197,At-203
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2017 (English)In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 95, no 4, 044311Article in journal (Refereed) Published
Abstract [en]

A newly observed isomeric intruder 1/2(+) state [T-1/2 = 3.5( 6) ms] is identified in At-203 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 pi(s(1/2))(-1) configuration. In addition, the structures above the 1/2(+) state in At-203 and At-197 are studied using in-beam gamma-ray spectroscopy, recoil-decay tagging, and recoil-isomer decay tagging methods. The 1/2(+) state is fed from 3/2(+) and 5/2(+) states, and the origin of these states are discussed.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2017. Vol. 95, no 4, 044311
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Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-207691DOI: 10.1103/PhysRevC.95.044311ISI: 000399938800002Scopus ID: 2-s2.0-85017290977OAI: oai:DiVA.org:kth-207691DiVA: diva2:1103818
Note

QC 20170531

Available from: 2017-05-31 Created: 2017-05-31 Last updated: 2017-06-30Bibliographically approved

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