2015Kh09: ²²¹U produced in ¹⁷⁶Yb(⁵⁰Ti,5n),E(⁵⁰Ti¹²⁺= 231-255 MeV reaction. The ⁵⁰Ti¹²⁺ pulsed beam produced by the UNILAC at GSI. Target=0.45 mg/cm² 5 thick ¹⁷⁶YbF₃ mounted on a rotating wheel, synchronized with the beam pulses. Evaporation residues (Er), separated by using gas-filled TransActinide Separator and Chemistry Apparatus (TASCA) with flight time of 0.53 μs 6 through the separator, were implanted in a double-sided silicon strip detector. The events due to radioactive decays of implanted residues were selected from the events related to beam using a multiwire proportional counter (MWPC). Measured Eα, Iα, Er-α correlated events from subsequent α-decay chains, half-lives of parent nuclei corresponding to the evaporation residues, and successive α-decay daughters, the latter identified by their known characteristics in literature. The identification of ²²¹U was made based on observed Er-α, two- or three-signal correlated events using a fast data acquisition and combined analog and digital (CANDI) readout system. α total of 26 Er traces were recorded for ²²¹U and analyzed with subsequent α decay chain: ²²¹U -> ²¹⁷Th -> ²¹³Ra. FWHM≈40 keV for 8.7 MeV α particles, recorded as single events, ≈110 keV and ≈180 keV for multiple α events stored in a single trace with time differences of 1 μs and 0.17 μs, respectively. Deduced α-decay reduced widths

Other: 2001Ni06: tentative formation in the ²²¹U+²¹⁷Th channel in Ce(⁸²Se,X),E(c.m.)=215-253 MeV reaction, with evaporation residue cross-section of 17 to 21.6 nb at energies of 215 to 238 MeV

Theoretical structure calculations: 2013To12, 2010To07, 2008Ad04

Q-value: Estimated uncertainties (2012Wa38): 220 for Q(β^-), 140 for S(n), 120 for S(p), 100 for Q(α)

Q-value: S(2n)=14950 110, S(2p)=4570 110, Q(εp)=2530 110 (2012Wa38); all values from systematic trend