Formation of Metastable States of Light Ions in Ion-Atom Collisions

The fractions of metastable particles in (1s2s)1,3S states are determined in beams of Z = 3-8 He-like ions of velocity v = 8.108 cm/s. He-like ions are formed in three different ways, namely, electron capture by hydrogen-like ions, electron loss by lithium-like ions and the passage of a primary ion beam through a thin solid film, wherein equilibrium charge distribution sets up. The cross-sections for production of Li-like ions in their ground and autoionization (1s 2s2p)4P5/2 states are estimated both experimentally and theoretically