Formation cross sections of He$^{+}$ ions in specific electronic states in collisions of He$^{2+}$ ions with hydrogen atoms

The method of collision spectroscopy, which is based on precision measurement of the kinetic energy of projectile ions after the electron capture process, is used to measure the partial cross sections of the formation of He$^{+}(n)$ ions in specific electronic states upon the capture of an electron by $^{3}$He$^{2+}$ ions with energy $E$ = 1.4–10 keV/a.m.u. from hydrogen atoms. A target of atomic hydrogen with a dissociation degree of 78% was created at the temperature of a tungsten dissociation cell of 2180 K.