Investigation of 48Ca-induced reactions with 242Pu and 238U targets at the JINR Superheavy Element Factory

Experiments using a 48Ca beam on 238U and 242Pu 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 286Fl and 287Fl, as well as their alpha-decay products, were refined after the detection of 25 and 69 new decay chains, respectively. In addition, 16 decay chains of 283Cn were observed in the 238U + 48Ca reaction. The possibility of existing of isomeric states in the 287Fl consecutive alpha decays is discussed. A new alpha 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 286Fl decay. A maximum cross section of 10.4+3.5-2.1pb was measured for the 242Pu(48Ca, 3n) 287Fl reaction.

Automated summary

This article reports the results of experiments on superheavy nuclei at the new JINR SHE Factory, including the refinement of decay properties for 286Fl, 287Fl, and 283Cn, as well as the observation of new decay chains.