Chakrabarti, K; Laporta, V; Tennyson, J; (2019) Calculated cross sections for low energy electron collision with OH. Plasma Sources Science and Technology , 28 (8) 10.1088/1361-6595/ab364c.

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Abstract

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\π ground state to the three excited states of A 2∑+, a 4 ∑, 1 2∑ 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.

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