Data from AR_93034_7.ens

The nucleus ⁶H was reported in the ⁷Li(⁷Li,⁸B) reaction at E(⁷Li)=82 MeV (2002Ti10) [σ(θ)≈60 nb/sr at θ=10°] and in the ⁹Be(¹¹B,¹⁴O) reaction at E(¹¹B)=88 MeV (1986Be35) [σ(θ)≈16 nb/sr at ≈8°]. ⁶H is unstable with respect to breakup into ³H + 3n by 2.7 MeV 4 with Γ=1.8 MeV 5 (2002Ti10), and 2.6 MeV 5 with Γ=1.3 MeV 5 (1986Be35). The adopted values are 2.7 MeV 3 and Γ=1.6 MeV 4 (1988Aj01). See also 1987Bo40. The atomic mass excess of ⁶H using 1997Au07 is 41.86 MeV 26.

However, there is no evidence for the formation of ⁶H in the ⁶Li(π^-,π⁺) reaction at E(π^-)=220 MeV (1990Pa25). An analysis of the proton spectra for the ⁷Li(π^-,p) reaction (1990Am04) showed no evidence ⁶H.

The ground state of ⁶H is calculated to have J^π=2^-. Excited states are predicted at 1.78, 2.80 and 4.79 MeV with J^π=1^-, 0^-, and 1⁺ (1985Po10) [(0+1)h\ℓω model space, see also for (0+2)h\ℓω calculations]. See additional references cited in 1988Aj01.