Approximation of the Width of the Line Profile Narrowed by Collisions

摘要

For models of hard and soft (in velocity) collisions, algebraic approximations of the line half-width are determined that depend on parameters of collisional broadening and narrowing and on the Doppler half-width. The average difference between the approximated and the exact values of the half-width do not exceed 0.1%. A simple criterion for determining the correspondence of models of hard and soft collisions to the experimental dependence of the half-width on the buffer gas pressure is proposed.