期刊
PHYSICAL REVIEW LETTERS
卷 121, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.012501
关键词
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资金
- National Science Foundation (NSF) [PHY-1102511, PHY-1565546]
- Department of Energy (DOE) National Nuclear Security Administration [DE-NA0003180, DE-NA0000979]
- DFG [DE 1516/3-1]
- DOE, Office of Science
- DOE [DE-SC0014537, DE-AC02-05CH11231]
- U.S. Department of Energy (DOE) [DE-SC0014537] Funding Source: U.S. Department of Energy (DOE)
Lifetime measurements of excited states in the neutron-rich nucleus S-43 were performed by applying the recoil-distance method on fast rare-isotope beams in conjunction with the Gamma-Ray Energy Tracking In-beam Nuclear Array. The new data based on gamma gamma coincidences and lifetime measurements resolve a doublet of (3/2(-)) and (5/2(-)) states at low excitation energies. Results were compared to the posdthorn pi(sd) - nu(pf) shell model and antisymmetrized molecular dynamics calculations. The consistency with the theoretical calculations identifies a possible appearance of three coexisting bands near the ground state of S-43: the K-pi =1/2(-) band built on a prolate-deformed ground state, a band built on an isomer with a 1f(7/2)(-1) character, and a suggested excited band built on a newly discovered doublet state. The latter further confirms the collapse of the N = 28 shell closure in the neutron-rich region.
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