Investigation of Ca48 -induced reactions with Pu242 and

Yu. Ts. Oganessian,V. K. Utyonkov,D. Ibadullayev,F. Sh. Abdullin,S. N. Dmitriev,М. Г. Иткис,А. В. Карпов,N. D. Kovrizhnykh,D. A. Kuznetsov,O. V. Petrushkin,A. V. Podshibiakin,A. N. Polyakov,A. G. Popeko,R. N. Sagaidak,L. Schlattauer,V. D. Shubin,M. V. Shumeiko,D. I. Solovyev,Yu. S. Tsyganov,A. A. Voinov,V. G. Subbotin,A. Yu. Bodrov,A. V. Sabelnikov, A. Lindner,K. P. Rykaczewski,T.T. King,J. B. Roberto,N. T. Brewer,R. Grzywacz,Z. G. Gan,Z. Y. Zhang,M. H. Huang,H. B. Yang

Experiments using a Ca48 beam on U238 and Pu242 targets to produce superheavy nuclei were performed at the gas-filled separator DGFRS-2 online to the new cyclotron DC280 at the SHE Factory at JINR. The decay properties of Fl286 and Fl287, as well as their α-decay products, were refined after the detection of 25 and 69 new decay chains, respectively. In addition, 16 decay chains of Cn283 were observed in the U238+Ca48 reaction. The possibility of existing of isomeric states in the Fl287 consecutive α decays is discussed. A new α line with an energy of 100–200 keV lower than the main one at 10.19 MeV was observed for the first time for even-even Fl286 decay. A maximum cross section of 10.4−2.1+3.5pb was measured for the Pu242(Ca48,3n) Fl287 reaction.Received 25 May 2022Accepted 1 August 2022DOI:https://doi.org/10.1103/PhysRevC.106.024612©2022 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasAlpha decayFissionIsomer decaysNuclear fusionPropertiesA ≥ 220Nuclear Physics