A search for the α + 6He decay of 10Be has been performed using the Li2O(18O,α6He) reaction at 80 and 100 MeV. An array of two Si–Si–CsI telescopes was used for the coincident detection of the breakup fragments. No evidence for the 16O(18O,α6He)24 Mg reaction was obtained, the cross-section being determined as σ< 1.9 µb and <3.9 µb at 80 and 100 MeV, respectively. The α + 15N decay of 19F was observed via the 7Li(18O,α15N)6He reaction. For the 19F excitation energy and centre-of-mass scattering angle ranges covered, the cross-sections are σ = (31.7 ± 6.6) µb at 80 MeV and (31.8 ± 6.6) µb at 100 MeV.