Charge transfer into excited states in thermal energy collisions

A spectral study of charge transfer and Penning processes for Cu, Zn, Ag, and Cd in a glow discharge

“…(1)) to carry off any excess energy and thus δE must be small. It has been generally established [2] that δE should be in the range of +0.1 to +0.5 eV for the reaction to proceed with the positive sign indicating that the energy of X + exceeds that of M + ⁎ .…”

Evidence of charge exchange pumping in calcium−xenon system

“…The ratio of the statistical weights for these levels is 2. For the 5d 2 D 5 / 2 and 5d 2 D 3 / 2 levels the energy difference is only 0.003 eV and the experimental result 5 for the cross section ratio is 1.8. This agreeslfairly well with the statistical weight ratio of 1.5.…”

Transition rates and transition rate diagrams in atomic emission spectroscopy: A review

“…ACT is a near-resonant process, selectively populating Mn II levels that are close to the energy of Ar ions (15.76 eV for the ground state 2 P 3/2 ion and 15.94 eV for the metastable Ar + *, 2 P 1/2 ion), so that ΔE is a small positive or negative value [53,54,62]. ACT reactions are supposed to preserve the total spin angular momentum of the reacting species (the Wigner rule [62,63]). The Mn I ground state is a sextet, hence, it is the quintet-and the septet Mn II states that can potentially be excited by ACT with Ar + ions.…”