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8C (1979AJ01)


(See the Isobar Diagram for 8C)

Mass of 8C: The atomic mass excess of 8C is 35096 ± 26 keV, Γc.m. = 230 ± 50 keV: see (1977TR07). See also (1974AJ01, 1974RO17, 1976TR1B, 1978RO01). 8C is stable with respect to 7B + p (Q = -0.13 MeV) and unstable with respect to 6Be + 2p (Q = 2.143), 5Li + 3p (Q = 1.55), 4He + 4p (Q = 3.514). At E(3He) = 76 MeV the differential cross section for formation of 8Cg.s. in the 14N(3He, 9Li) reaction is ≈ 5 nb/sr at θlab = 10° (1976RO04). The 12C(α, 8He)8C reaction has been studied at Eα = 156 MeV: dσ/dΩ ≈ 20 nb/sr at θlab = 20° (1974RO17). See also (1976RO1M) and (1974IR04, 1975BE31, 1976IR1B; theor.)