Abstract
We present a quantum dynamical treatment of the vibrationally elastic scattering off tetrafluorocarbon(CF4) molecules by very low energy positrons. The present calculation is based on thefixed-nuclei approximation and the interaction potential between the positron and themolecular target includes the ab initio electrostatic and the target correlation-polarizationeffects. The latter contribution is considered by means of a parameter-free model potentialbased on the density functional theory. The cross sections for this system areobtained by solving multichannel close-coupling equations for the wavefunctionof the scattered positron, while no positronium formation channel is taken intoaccount by the present calculation. The elastic cross section, the scattering length(A0) and the location of a virtual state for the total system are obtained and discussed indetail.
Published Version
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