Spectroscopy along flerovium decay chains. III : Details on experiment, analysis, 282Cn, and spontaneous fission branches
Abstract
Flerovium isotopes (element Z=114) were produced in the fusion-evaporation reactions 48Ca+242,244Pu and studied with an upgraded TASISpec decay station placed in the focal plane of the gas-filled separator TASCA at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany. Twenty-nine flerovium decay chains were identified by means of correlated implantation, α decay, and spontaneous fission events. Data analysis aspects and statistical assessments, primarily based on measured rates of various events, which laid the foundation for the comprehensive spectroscopic information on the flerovium decay chains, are presented in detail. Various decay scenarios of an excited state observed in 282Cn are examined in depth with the help of GEANT4 simulations and assessed by predictions of beyond mean-field calculations including triaxial shape degrees of freedom. Previous, revised, and newly derived fission probabilities of even-even superheavy nuclei are compared with various theoretical predictions.
Main Authors
Format
Articles
Research article
Published
2023
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-202304062424Use this for linking
Review status
Peer reviewed
ISSN
2469-9985
DOI
https://doi.org/10.1103/PhysRevC.107.024301
Language
English
Published in
Physical Review C
Citation
- Såmark-Roth, A., Cox, D. M., Rudolph, D., Sarmiento, L. G., Albertsson, M., Carlsson, B. G., Egido, J. L., Golubev, P., Heery, J., Yakushev, A., Åberg, S., Albers, H. M., Block, M., Brand, H., Calverley, T., Cantemir, R., Clark, R. M., Düllmann, C. E., Eberth, J., . . . Uusitalo, J. (2023). Spectroscopy along flerovium decay chains. III : Details on experiment, analysis, 282Cn, and spontaneous fission branches. Physical Review C, 107(2), Article 024301. https://doi.org/10.1103/PhysRevC.107.024301
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Funder(s)
European Commission
Funding program(s)
Research infrastructures, H2020
Research infrastructures, H2020
Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Education and Culture Executive Agency (EACEA). Neither the European Union nor EACEA can be held responsible for them.
Additional information about funding
The results presented here are based on the experiment U310, which was performed at the beam line X8/TASCA at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt (Germany) in the frame of FAIR Phase-0. The authors would like to thank the ion-source and accelerator staff at GSI for their supreme efforts. This work has received funding from the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 654002 (ENSAR2). The 244Pu target material was provided by the U.S. DOE through ORNL. The Lund group is indebted to decisive support from the Knut and Alice Wallenberg foundation (KAW 2015.0021), and we highly appreciate the possibility to collaborate with the workshops at IKP Köln. This work was also supported by the Swedish Research Council (Vetenskapsrådet, VR 2016-3969), the Royal Physiographic Society in Lund, the Spanish Ministerio de Ciencia e Inovación under Contract No. FPA2017-84756-C4-2-P, the German BMBF (05P18UMFN2), the U.S. DOE under Contract No. DE-AC02-05CH11231 (LBNL), and the UK STFC. A.S.-R., D.M.C., and D.R. are grateful for discussions with A. Jungclaus, CSIC Madrid, and support from T. Kibédi, ANU, Canberra.
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