期刊
PHYSICAL REVIEW C
卷 79, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.79.064320
关键词
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资金
- NSERC of Canada
- FWO-Vlaanderen (Belgium),
- (BOF-K.U.Leuven) [GOA/2004/03]
- European Commission [RII3-CT-2004-506065]
- United Kingdom Science and Technology Facilities Council
- Slovak Research and Development Agency [APVV-20-006205]
- Science and Technology Facilities Council [EP/C015266/1, ST/G008671/1, ST/F012039/1] Funding Source: researchfish
- STFC [ST/F012039/1, EP/C015266/1, ST/G008671/1] Funding Source: UKRI
Detailed alpha-decay studies of the neutron-deficient isotope At-194 have been performed in the complete fusion reaction Fe-56+Pr-141 -> At-194+3n at the velocity filter SHIP. Two alpha-decaying isomeric states with half-lives of T-1/2(At-194(m1))=310(8) ms and T-1/2(At-194(m2))=253(10) ms were identified in this nucleus. Their complex decays to the states in the daughter nucleus Bi-190 are discussed in the article. We propose that similar to the case of the neighboring At-191,At-192,At-193,At-195 isotopes, the oblate-deformed configurations based on the proton 1/2(+)[440] and/or 7/2(-)[514] Nilsson orbitals become important in At-194. A new isomeric state with the half-life of 175(8) ns was observed in Bi-190. .
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