2010Ni14: ²³⁸U(³⁴S,4n), E(c.m.)=152.0 MeV ³⁴S beam produced by the linear accelerator UNILAC and the velocity filter SHIP at GSI in Darmstadt, beam intensity from 2.0 to 2.5 pμA. ²³⁸U target prepared by sputtering of depleted ²³⁸U metal on a 43 μg/cm² carbon backing. The α-decay events and fission fragments were detected by a position sensitive 16-strip Si PIPS detector (stop detector) with an active area of 80×35 mm. α clover Ge detector was used to measure γ rays or x rays in coincidence with α particles and/or SF events. Measured σ, Eα, T_1/2. FWHM for α particles=40 keV. One event was assigned by 2010Ni14 to the decay of ²⁶⁸Hs nuclide.

2010Gr04: ²³⁸U(³⁶S,6n),E=256.4 MeV from UNILAC at GSI. Measured reaction products using COMPACT system of efficient and rapid chemical-separation and online detection based on the cry-thermo- chromatography method. Based on expected production cross section for 6n-channel and Eα, assignment to ²⁶⁸Hs in 2009Dv01 was excluded with certainty.

2009Dv01: ²⁴⁸Cm(²⁵Mg,5n), E=140 MeV, provided by UNILAC at GSI. The α particles and fission fragments were detected using the Cryo Online Multidetector for Physics and Chemistry of Transactinides (COMPACT). Measured α and fission spectra. Deduced reaction cross sections. Transport time was ≈1 s. No decay chains were ascribed to the decay of ²⁶⁸Hs. Upper limit of cross section of ²⁶⁸Hs production was deduced from one event as σ<1.3 pb. Either ²⁶⁸Hs does not decay by α mode or its half-life is <0.5 s.

For theoretical studies, consult Nuclear Science References (NSR) database at NNDC, BNL for 73 primary references dealing with the half-lives and other aspects of nuclear structure in this mass region

Q-value: Estimated uncertainties (2017Wa10): ΔQ(β^-)=370, ΔS(n)=300, ΔS(p)=390.

Q-value: S(2n)=14450 290, S(2p)=5370 380 (syst,2017Wa10)