MEASUREMENTS OF THE REACTIONS C-12(NU(MU),MU(-))N-12(G.S.) AND C-12(NU(MU),MU(-))X

Charged current scattering of nu(mu) on C-12 has been studied using a pi(+) decay-in-flight nu(mu) beam at the Los Alamos Meson Physics Faci lity. A sample of 56.8 +/- 9.6 events satisfying criteria for the excl usive reaction C-12(nu(mu),mu(-))N-12(g.s.) was obtained using a large liquid scintillator neutrino detector. The observed flux-averaged cro ss section (6.6 +/- 1.0 +/- 1.0) X 10(-41) cm(2) agrees well with reli able theoretical expectations. A measurement was also obtained for the inclusive cross section to all accessible N-12 states C-12( nu(mu),mu (-))X This flux-averaged cross section is (11.2 +/- 0.3 +/- 1.8) X 10( -40) cm(2), which is approximately half of that given by a recent cont inuum random-phase approximation calculation.