Speaker
Dr
Jan Dvorak
(Helmholtz Institute Mainz)
Description
Production of numerous superheavy elements (SHE) in 48Ca irradiations of actinide targets was reported by the Dubna Gas Filled Recoil Separator (DGFRS) group in past years [1]. Independent verification of these observations has been of paramount importance, but confirmation experiments failed to produce SHE in 48Ca induced reactions. We report on the first successful independent verification of the production of element 114 in the reaction 48Ca(242Pu,3-4n)287,286114 at a center-of-target energy of 244 MeV. Two genetically correlated decay chains were observed during 8-day experiment at the Lawrence Berkeley National Laboratory's (LBNL) 88-Inch Cyclotron. Based on the observed decay properties these decay chains were attributed to decay of 287114 and 286114 produced in 3n and 4n channel, respectively. Implications of this observation on chemistry and physics of the heaviest elements will be discussed.
Primary author
Dr
Jan Dvorak
(Helmholtz Institute Mainz)
Co-authors
Prof.
Heino Nitsche
(Lawrence Berkeley National Laboratory and University of California, Berkeley)
Dr
Irena Dragojević
(Lawrence Berkeley National Laboratory and University of California, Berkeley)
Dr
K.E. Gregorich
(Lawrence Berkeley National Laboratory)
Dr
Liv Stavsetra
(Lawrence Berkeley National Laboratory)
Mr
M.A. Garcia
(Lawrence Berkeley National Laboratory and University of California, Berkeley)
Mr
P.A. Ellison
(Lawrence Berkeley National Laboratory and University of California, Berkeley)
