Yields of gamma rays emitted following capture of negative muons by 28Si and 24Mg

We have measured the yields of specific final states excited in the capture of negative muons by ²⁴Mg and ²⁸Si. The yields are compared with the cross sections for excitation of the analog states by 180° electron scattering and with the relative populations of levels produced by the decay of the giant-dipole-resonance states.