Independent Verification of Element 114 (ununquadium)

Workers in the USA verify the production of element 114 in the reaction of 244-MeV 48Ca with 242Pu. Two chains of time- and position-correlated decays were assigned to 286114 and 287114. The observed decay modes, half-lives, and decay energies agree with the original claims of researchers at the Joint Institute for Nuclear Research at Dubna in Russia. The Russian results were first reported in 1999. Such independent verification is vital for verification purposes. The measured cross sections at a center-of-target energy of 244 MeV for the 242Pu(48Ca,3–4n)287,286114 reactions were 1.4(+3.2, -1.2) pb each, which are lower than the reported values.1

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