We present elastic cross sections for scattering of electrons by a phosphine (PH 3 ) molecule using the R -matrix method for incident electron energies in the range 0.025–15 eV. We find a shape resonance in 2 E scattering symmetry in the static-exchange (SE) and static-exchange plus polarization (SEP) approximations whose resonance positions are 5.57 eV and 2.34 eV, respectively. The Born correction is applied for the elastic transition to account for partial waves higher than l = 4 excluded in the R -matrix calculation. A comparison of our results in both approximations is carried out with other theoretical and the experimental work. Our calculations also reproduce the Ramsauer–Townsend effect that reflects the accuracy of electron–electron correlation included in our theoretical treatment.
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Munjal et al. (2007) studied this question.
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