The mean life of the first excited state of ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$ at 718 keV has been measured as 1020±5 ps. The result is compared to previous measurements, and its relevance to an understanding of second order effects in Coulomb excitation of ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$ is commented upon.

NUCLEAR REACTIONS ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}(p, p^{\prime })$, $E=4.5\mathrm{}$ MeV; measured $p-\gamma$ coincidences, deduced $T_{\frac{1}{2}}$. Enriched target.

• Received 6 December 1982

DOI:https://doi.org/10.1103/PhysRevC.28.432