Using the short pulses of a linac, a measurement has been performed of partial ${\mu }^{-}$-capture rates in ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$, ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, and ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$ leading, respectively, to the bound excited states of ${}_{}{}^{10}{}_{}{}^{}\mathrm{Be}$, ${}_{}{}^{12}{}_{}{}^{}\mathrm{B}$, and ${}_{}{}^{14}{}_{}{}^{}\mathrm{C}$. These rates are deduced from the intensities of the observed de-excitation nuclear $\gamma$ rays. A theoretical discussion is given based upon 1$p$-shell models and mesonic exchange currents.

[NUCLEAR REACTIONS Muon capture ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}(\mu ,\nu ){}_{}{}^{10}{}_{}{}^{}\mathrm{Be}$, ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}(\mu ,\nu ){}_{}{}^{12}{}_{}{}^{}\mathrm{B}$, and ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}(\mu ,\nu ){}_{}{}^{14}{}_{}{}^{}\mathrm{C}$. Measured $I_{\gamma }$; Ge(Li) and hyperpure Ge detectors. Deduced partial capture rates. Mesonic exchange corrections and $1p$-shell models.]

• Received 14 January 1981

DOI:https://doi.org/10.1103/PhysRevC.24.241