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From the known location of the ⁷Li T = 3/2 state, the mass excess of ⁷He is calculated as 26.03 ± 0.15 MeV (calculation of the Coulomb energy difference based on the pair ⁶He - ⁶Li* (T = 1)); ⁷He is then unstable with respect to decay into ⁶He + n by 0.36 MeV (DE65F). See also (PE53C, BA60R, GO60P, YA61B, EL62D, NE63). Some reactions leading to ⁷He are ⁷Li(n, p)⁷He, ⁷Li(t, ³He)⁷He and ⁹Be(n, ³He)⁷He.