THE RADIATIVE ASSOCIATION OF LI+ AND H, LI AND H+, AND LI AND H

The rate coefficients for formation of LiH+ and LiH by radiative assoc iation are determined for temperatures between 50 and 5000 K by quantu m mechanical methods. The rate coefficients generally decrease slowly with temperature and have magnitudes at 300 K of 7.5 x 10(-23), 3.3 x 10(-15), and 3.3 x 10(-20) cm(3) s(-1) for Li+ + H, Li + H+, and Li H, respectively. Radiative association cross sections and ab initio po tentials and dipole moments for the ground and 2(2) Sigma(+) states of LiH+ are also given. We briefly discuss the importance of these forma tion rates for the lithium chemistry of the early universe.