RATE COEFFICIENTS FOR CHARGE-TRANSFER BETWEEN HYDROGEN AND THE FIRST 30 ELEMENTS

We present analytic fits to charge exchange rate coefficients over the full range of temperatures which occurs in photoionized or shock-heat ed plasmas. We consider reactions between neutral hydrogen and all ele ments with parent ion charge q=1-4 up to Z=30. Many rates were obtaine d from various sources in the literature. For reactions for which no d ata were available, we calculated rates using the Landau-Zener formali sm. For these new reactions, we tabulate both total and state-specific rate coefficients. All are fitted with a consistent, accurate formula . These fits may be incorporated easily into spectral synthesis codes, and we make available an electronic form of our results. We draw atte ntion to the most important reactions without high-quality rate coeffi cients to encourage further work.