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Prompt and delayed spectroscopy of At-203: Observation of a shears band and a 29/2(+) isomeric state
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2018 (English)In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 2, article id 024301Article in journal (Refereed) Published
Abstract [en]

Using fusion-evaporation reactions, a gas-filled recoil separator, recoil-gating technique and recoil-isomer decay tagging technique we have extended the level scheme of At-203 (N = 118) significantly. We have observed an isomeric [tau = 14.1(3) mu s] state with a spin and parity of 29/2(+). The isomeric state is suggested to originate from the pi(h(9/2)) circle times |Po-202; 11(-)> coupling, and it is depopulated through 286 keV E2 and 366 keV E3 transitions. In addition, we have observed a cascade of magnetic-dipole transitions which is suggested to be generated by the shears mechanism.

Place, publisher, year, edition, pages
American Physical Society, 2018. Vol. 97, no 2, article id 024301
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Physical Sciences
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URN: urn:nbn:se:kth:diva-223265DOI: 10.1103/PhysRevC.97.024301ISI: 000424056700001OAI: oai:DiVA.org:kth-223265DiVA, id: diva2:1183794
Funder
EU, FP7, Seventh Framework Programme, 262010
Note

QC 20180219

Available from: 2018-02-19 Created: 2018-02-19 Last updated: 2018-02-19Bibliographically approved

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Jakobsson, Ulrika

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