The most neutron-deficient isotopes 215,216U were produced in the complete-fusion reaction 180W(40Ar, 4-5n)215,216U. Evaporation residues recoiled from the target were separated in-flight from the primary beam by the gas-filled recoil separator SHANS and subsequently identified on the basis of correlated α-decay chains. Two α-decaying states were identified in 216U, one for the ground state and the other for the isomeric state with 8+(πh9/2πf7/2) configuration. Theα-decay properties for 215,216U and the systematics of 8+ isomeric state in N=124, 126 isotones were investigated.
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