  The hydroxyl radical, OH, is an important component of many natural and
technological plasmas but there is little available information on processes
involving its collisions with low-energy electrons. Low-energy electron
collisions with OH are studied in the framework of the R-matrix method.
Potential energy curves of some of the low lying target states of doublet and
quartet symmetry which go to the O(3P)+H(2S), O(1D)+H(2S) and O(1S)+H(2S)
asymptotic limits are obtained for inter nuclear separations between 1 - 6 a0.
Scattering calculations are performed at the OH equilibrium geometry Re =
1:8342 a0 to yield cross sections for elastic scattering, electronic
excitations form the X2\Pi ground state to the three excited states of
A2Sigma+, a 4Sigma, 1 2Sigma symmetry and for electron impact dissociation of
OH. The positions and widths for negative ion resonances in the e{OH system are
used estimate the cross section for dissociative electron attachment to OH
which is found to be significant at electron energies about 1.5 eV.
