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8C (1988AJ01)


(See the Isobar Diagram for 8C)

Mass of 8C:The atomic mass excess of 8C is 35095 ± 24 keV (1985WA02); αc.m. = 230 ± 50 keV: see (1979AJ01). 8C is stable with respect to 7B + p (Q = -0.13 MeV) and unstable with respect to 6Be + 2p (Q = 21.4), 5Li + 3p (Q = 1.55), 4He + 4p (Q = 3.51). 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°. The 12C(α, 8He)8C reaction has been studied at Eα = 156 MeV: dσ/dΩ ≈ 20 nb/sr at θlab = 20°: see (1979AJ01). See also (1985AN28) and (1983ANZQ, 1986HE26, 1987BL18, 1987SA15; theor.).