Production of L X rays in energetic Cl → Cl collisions

The L X-ray spectrum from Cl⁷⁺ → Cl₂ collisions at 40 MeV is presented. The large number of lines observed are generally found to be consistent with calculations of X-ray transition energies from the “unit flourescence yield configuration”, 1s²2s²2pⁿ3s¹. The calculations indicate large X-ray energy splittings for transitions from different multiplet states. The assumption of statistical population of the multiplets is found to be consistent with the intensities of the observed lines.