Collision Processes of Highly Excited Hydrogen Atom. II. Transitions between Degenerate States at Low Energies

抄録

The calculations using the impact parameter method employed in paper I [N. Toshima: J. Phys. Soc. Japan 42 (1977) 633] are extended to lower energies. The cross sections for 10S_1⁄2→10P_1⁄2, 10S_1⁄2→10P_3⁄2 and 10P_1⁄2→10D_3⁄2 are also calculated. The Glauber approximation is also applied to these processes and it is in good agreement with the impact parameter method down to 1.25 eV for proton impact and down to 1.36×10⁻³ eV for electron impact. A simple semiempirical formula is proposed, which agrees well with the impact parameter method and the Glauber approximation for all the processes over the whole energy range studied in this article.