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⁷H has not been observed. Attempts have been made to detect it in the spontaneous fission of ²⁵²Cf (1982AL33) and in the ⁷Li(π^-, π⁺) reaction [see (1984AJ01)]. The ground state is calculated to have J^π = 1/2⁺ and to be unstable with respect to 1n, 2n, 3n and 4n emission. Excited states are predicted at 4.84, 5.00 and 6.96 MeV, with J^π = 3/2⁺ , 5/2⁺, and 5/2^- [(0 + 1)ℏω model space] and at 3.88, 3.94 and 5.99 MeV with J^π = 3/2⁺, 5/2⁺ and 1/2⁺ [(0 + 2)ℏω model space] (1985PO10). See also (1984BE1C, 1987FL1A, 1987GOZN, 1987PE1C) and (1985GA1C, 1986GA33; theor.).