Positron-CO collisions using rotational LFCCA

A rotational laboratory frame close-coupling approximation has been employed to investigate positron-CO scattering below the Ps formation threshold. In the calculation ten rotational states (j=0-9) are retained and a parameter-free positron correlation polarization potential following Jain is used. The present LFCCA predictions differ appreciably from the ANR predictions. The difference in results is due to the failure of the ANR theory to include the rotational motion of the target molecule dynamically. The result shows the necessity of using rotational LFCCA to investigate the scattering of molecules having a permanent dipole.

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