Spectroscopy along flerovium decay chains. III. Details on experiment, analysis, 282Cn, and spontaneous fission branches



Samark-Roth, A, Cox, DM, Rudolph, D, Sarmiento, LG, Albertsson, M, Carlsson, BG, Egido, JL, Golubev, P, Heery, J, Yakushev, A
et al (show 44 more authors) (2023) Spectroscopy along flerovium decay chains. III. Details on experiment, analysis, 282Cn, and spontaneous fission branches. PHYSICAL REVIEW C, 107 (2).

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Abstract

Flerovium isotopes (element Z=114) were produced in the fusion-evaporation reactions Ca48+Pu242,244 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 Cn282 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.

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 05 May 2023 09:06
Last Modified: 05 May 2023 09:06
DOI: 10.1103/PhysRevC.107.024301
Open Access URL: https://doi.org/10.1103/PhysRevC.107.024301
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3170216