β-Delayed Proton Decay ofC9

The delayed-proton spectrum following the $\beta$ decay of ${}_{}{}^9{}_{}{}^{}\mathrm{C}$ (${\tau }_{\frac{1}{2}}=126.5\mathrm{}\pm 1.0$ msec) was found to consist primarily of a continuum extending from 13 to 1.5 MeV, the latter being the lowest energy observed. In addition to the previously observed peaks at 9.28 and 12.30 MeV (c.m.), possible peaks between 3 and 7 MeV have been tentatively identified.