Rich band structure and multiple long-lived isomers in the odd-odd 118Cs nucleus
Abstract
One of the largest sets of collective excitations built on two-quasiparticle configurations in odd-odd nuclei of the proton-rich A≈120 mass region is reported in 118Cs. Several new rotational bands and long-lived isomers have been identified. The 8+ bandhead of the πh11/2⊗νh11/2 band is a short-lived isomer with a half-life in the nanosecond range, while the 7+ state below it is a long-lived isomer with a half-life of T1/2=0.55(6)μs. Two other long-lived isomers have been identified: a 66-keV transition detected at the MARA focal plane depopulates one of them, indicating a half-life in the microsecond range, while no depopulating transitions have been identified for the other, indicating a much longer half-life. Extensive particle number conserving cranked shell model calculations and alignment analysis have been employed to investigate the rich band structure of 118Cs, which exhibits one of the most complete sets of two-quasiparticle configurations in nuclei close to the proton drip line.
Main Authors
Format
Articles
Research article
Published
2021
Series
Subjects
Publication in research information system
Publisher
American Physical Society (APS)
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202111265813Use this for linking
Review status
Peer reviewed
ISSN
2469-9985
DOI
https://doi.org/10.1103/PhysRevC.104.044325
Language
English
Published in
Physical Review C
Citation
- Zheng, K.K., Petrache, C. M., Zhang, Z. H., Astier, A., Lv, B. F., Greenlees, P. T., Grahn, T., Julin, R., Juutinen, S., Luoma, M., Ojala, J., Pakarinen, J., Partanen, J., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Sarén, J., Tann, H., Uusitalo, J., . . . Page, R. D. (2021). Rich band structure and multiple long-lived isomers in the odd-odd 118Cs nucleus. Physical Review C, 104(4), Article 044325. https://doi.org/10.1103/PhysRevC.104.044325
License
Funder(s)
Research Council of Finland
Funding program(s)
Centre of Excellence, AoF
Huippuyksikkörahoitus, SA
Additional information about funding
This work has been supported by the China Scholarship Council (CSC), CSC No. 201804910386. This work has been supported by the Academy of Finland under the Finnish Centre of Excellence Programme (2012-2017), by the EU Seventh Framework Programme Project No. 262010 (ENSAR), by the United Kingdom Science and Technology Facilities Council, by the National Research, Development and Innovation Fund of Hungary (Project No. K128947), as well as by the European Regional Development Fund (Contract No. GINOP-2.3.3-15-2016-00034); by the Polish National Science Centre (NCN) Grant No. 2013/10/M/ST2/00427; by the Swedish Research Council under Grant No. 2019-04880; by the Natural Sciences and Engineering Research Council of Canada (NSERC); and by the National Natural Science Foundation of China (Grants No. 11505242, No. 11305220, No. U1732139, No. 11775274, and No. 11575255). The use of germanium detectors from the GAMMAPOOL is acknowledged. I.K. was supported by National Research, Development and Innovation Office-NKFIH, contract number PD 124717.
Copyright©2021 American Physical Society