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This nucleus was observed in the ²⁴Mg(p, ⁶He)¹⁹Na reaction at E_p = 54.7 MeV (69CE01). A study via the ²⁴Mg(³He, ⁸Li)¹⁹Na reaction at E(³He) = 76.3 MeV leads to an atomic mass excess of 12.929 ± 0.012 MeV for ¹⁹Na; it is then unstable with respect to breakup into ¹⁸Ne + p by 321 ± 13 keV. An excited state at E_x = 120 ± 10 keV is also reported (75BE38, 93AU05). See also (87AJ02) and (87PO01, 87SA24, 88CO15, 90PO04, 92AV03).