Spectroscopy of [sub 199,201]At
Julkaistu sarjassa
Research report / Department of Physics, University of JyväskyläTekijät
Päivämäärä
2015Oppiaine
FysiikkaThe excited states of 199At and 201At were studied using fusion evaporation
reactions, a gas-filled recoil separator and various tagging methods. The level
scheme of 201At was extended a lot including a cascade of magnetic dipole
transitions, that is suggested to form a shears band. In addition, a 29/2+
[T1/2 = 3.39(9) s] isomeric state was observed. The 29/2+ state is suggested
to originate from the p(h9/2)
j200Po; 11i configuration, and it depopulates
through 269-keV E2 and 339-keV E3 transitions. In both nuclei 199,201At we
have observed also the isomeric 1/2+ [T1/2 = 273(9), 45(3) ms, respectively]
intruder state, that is suggested to originate from the p(s1/2)1 configuration.
The 1/2+ state decays through 103- keV and 269-keV E3 transitions in
199,201At, respectively. In both nuclei the 1/2+ state is fed from 3/2+ and 5/2+
states, which are suggested to originate from the p(d3/2)1 and p(d5/2)1
configurations, respectively.
Julkaisija
University of JyväskyläISBN
978-951-39-6173-2ISSN Hae Julkaisufoorumista
0075-465XAsiasanat
Metadata
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