期刊
PHYSICAL REVIEW C
卷 97, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.97.024301
关键词
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资金
- Academy of Finland under the Finnish Center of Excellence Programme [213503]
- EU 7th framework programme [262010]
- US Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC02-06CH11357]
- United Kingdom Science and Technology Facilities Council (STFC)
- Major State 973 Program of China [2013CB834400]
- National Natural Science Foundation of China [11335002, 11375015, 11461141002, 11621131001]
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.
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