Theory of light-induced drift. VI. Roles of accommodation of normal and tangential momenta in surface light-induced drift with positive spontaneous relaxation parameter

Abstract

Surface light-induced drift of a rarefied gas in cells with flat-plate and circular-cylindrical geometries is studied, and exact analytical solutions to the model rate equations are obtained in the limit of large Knudsen number. The work is a continuation of part V of this series of papers, in which the model rate equations were tailored specifically in order to study the roles played by both the tangential and normal momentum molecule-surface accommodation coefficients. In part V, the ``spontaneous decay'' parameter, $\ensuremath{\gamma}$, was set equal to zero, and the case of general ``laser excitation'' parameter, $q$, was studied. In the present paper, we get exact analytical results for the case of arbitrary $\ensuremath{\gamma}$ in the limit of small $q$; we also get accurate numerical results for arbitrary $\ensuremath{\gamma}$ and $q$. In passing, one serious, and other less serious, typographical errors in part V are corrected.