  We discuss how the measurement of the $\bar{\nu}_{e}-e^{-}$ elastic cross
section at reactor energies can be used to extract new information on the
neutrino oscillation parameters. We also consider the magnetic moment
contribution and show how both effects tend to cancel each other when the total
cross section is measured; to achieve the separation of each of the effects,
experiments capable of measuring angular and energy distributions with respect
to the outgoing electron become necessary. We study how their different energy
and angle dependence enables such a separation; then, the sensitivity to
magnetic moments, masses and mixings is discussed. We also show how these
experiments can be sensitive to the magnetic moment of $\tau$ neutrinos via
$\bar{\nu}_{e}\leftrightarrow \bar{\nu}_{\mu}$ oscillation.
