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The interactions of a E/A=70-MeV 9C beam with a Be target was used topopulate levels in Be, B, and C isotopes which undergo decay into many-particleexit channels. The decay products were detected in the HiRA array and the levelenergies were identified from their invariant mass. Correlations between thedecay products were examined to deduce the nature of the decays, specificallyto what extent all the fragments were created in one prompt step or whether thedisintegration proceeded in a sequential fashion through long-livedintermediate states. In the latter case, information on the spin of the levelwas also obtained. Of particular interest is the 5-body decay of the 8C groundstate which was found to disintegrate in two steps of two-proton decay passingthrough the 6Beg.s. intermediate state. The isobaric analog of 8Cg.s. in 8B wasalso found to undergo two-proton decay to the isobaric analog of 6Beg.s. in6Li. A 9.69-MeV state in 10C was found to undergo prompt 4-body decay to the2p+2alpha exit channel. The two protons were found to have a strongenhancementin the diproton region and the relative energies of all four p-alphapairs were consistent with the 5Lig.s. resonance.

Investigations of three, four, and five-particle exit channels of levels in light nuclei created using a 9C beam