Information on mass chains and nuclides available on this website:

WWW TUNL

This nucleus has been observed in the ²⁴Mg(p, ⁶He)¹⁹Na reaction (CE69; E_p = 54.7 MeV) and in the ²⁴Mg(³He, ⁸Li)¹⁹Na reaction (BE75L; E(³He) = 76.3 MeV). The latter experiment leads to an atomic mass excess of 12.928 ± 0.012 MeV for ¹⁹Na in its ground state. In addition, an excited state is observed at E_x = 120 ± 10 keV (BE75L). Assuming the atomic mass excess listed above, ¹⁹Na(0) is unstable with respect to breakup into ¹⁸Ne + p by 320 ± 13 keV. See also (CE72, BE76T, JA76M), (BE75Q, SH77I; theor.) and (72AJ02).