DEPOPULATION OF NA(8S) COLLIDING WITH GROUND-STATE HE - STUDY OF COLLISION DYNAMICS

A systematic study of the collison dynamics associated with depopulati on of Na(8s) atom colliding with ground state He has been made by appl ying the semi-classical impact parameter method using molecular orbita l (MO) basis sets of different sizes. The cross-sections for total dep opulation of the parent atom as well as those for individual transitio ns have been calculated. It is shown that the basis set must be large enough so as to include not only the immediate adjacent states couplin g with the parent state but also other nearby states, which can affect the overall flux distribution in the reaction.