Charge Changing Collisions of Atomic Beams in Alkali-Metal Vapors. IV. Total Cross Sections for Single-Electron Capture by H+ Ion and H(1s) Atom

Total cross sections σ +0 and σ 0- for single-electron capture by H + ion and H(1s) atom during passage through vapors of Cs, Rb, K and Na have been measured by observing the growth of fast collision products in the projectile energy range 0.4–5.0 keV. The partial cross sections σ m and σ g (σ +0 =σ m +σ g ), which are the cross sections eventually leading to formation of H(2s) and H(1s), respectively, have also been determined with the aid of the metastable atom fraction f 2s data obtained previously. Each σ m curve has noticeable structure composed of two humps. The total cross sections σ +0 also have, although not noticeable, similar structure, indicating the existence of some secondary inferference effects between the charge exchange channel and other inelastic or elastic channel. In the case of Cs target, comparison with other experimental and theoretical data is made.