  A relativistic distorted-wave impulse-approximation model to quasielastic
neutral-current neutrino-nucleus scattering is developed, using the
relativistic mean field theory for the bound state and taking into account the
final state interaction in the relativistic scattering state. Results for the
neutrino (antineutrino) reaction on 12C target nucleus are presented in an
energy range between 500 and 1000 MeV. The sensitivity to the strange quark
content of the axial-vector form factor is discussed.
