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¹⁵Li has not been observed. Its atomic mass excess is calculated to be 81.60 MeV: see (81AJ01). It is then unstable with respect to decay into ¹⁴Li + n and ¹³Li + 2n by 1.2 and 5.1 MeV, respectively. (85PO10) calculate [in a (0 + 1)h-barω model space] that the first four states of ¹⁵Li at 0, 0.73, 2.39 and 2.77 MeV have, respectively, J^π = 3/2^-, 1/2^-, 7/2^- and 5/2^-. See also (88POZS; theor.).