Abstract
Spectra of energetic protons and deuterons emitted following negative muon capture from rest in $^{3}\mathrm{He}$ have been measured for the first time. Significant capture strength is observed at high energy transfers (${\mathit{m}}_{\mathrm{\ensuremath{\mu}}}$-${\mathit{E}}_{\ensuremath{\nu}}$g60 MeV) for the two-body and three-body breakup channels, indicative of the importance of nucleon-nucleon correlations and meson exchange currents in the capture process. A simple plane wave impulse approximation calculation reproduces the proton spectrum reasonably well, but underpredicts the deuteron rate at the highest energies by a large factor.
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