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

Summary, in English

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.

• Author: A. Såmark-Roth; D. M. Cox; D. Rudolph; L. G. Sarmiento; M. Albertsson; B. G. Carlsson; J. L. Egido; P. Golubev; J. Heery; A. Yakushev; S. Åberg; H. M. Albers; M. Block; H. Brand; T. Calverley; R. Cantemir; R. M. Clark; Ch. E. Düllmann; J. Eberth; C. Fahlander; U. Forsberg; J. M. Gates; F. Giacoppo; M. Götz; S. Götz; R.-D. Herzberg; Y. Hrabar; E. Jäger; D. Judson; J. Khuyagbaatar; B. Kindler; I. Kojouharov; J. V. Kratz; J. Krier; N. Kurz; L. Lens; J. Ljungberg; B. Lommel; J. Louko; C.-C. Meyer; A. Mistry; C. Mokry; P. Papadakis; E. Parr; J. L. Pore; I. Ragnarsson; J. Runke; M. Schädel; H. Schaffner; B. Schausten; D. A. Shaughnessy; P. Thörle-Pospiech; N. Trautmann; J. Uusitalo
• Department/s: Nuclear physics; Mathematical Physics
• Publishing year: 2023-02-06
• Language: English
• Publication/Series: Physical Review C
• Volume: 107
• Issue: 2
• Full text: - 740 kB; Download statistics
• Links: http://dx.doi.org/10.1103/PhysRevC.107.024301
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Keywords: Superheavy elements; Nuclear spectroscopy; Alpha decay; Spontaneous fission; E0 decay; Mean field theory
• Status: Published
• Project: Characterization of New Superheavy Elements; Nuclear Structure at the Limits: Isotope-selective Spectroscopy; Spectroscopy along Decay Chains of Element 114, Flerovium
• ISBN/ISSN/Other: ISSN: 2469-9985