Effects of Chemical Combination with Oxygen and Fluorine on the K_1,2-Doublet of some of the Lighter Elements

Abstract

IT is well known that the K_1,2-doublet from the elements 12 (Mg) to 17 (Cl) is influenced by chemical binding, apparent, for example, through its displacement towards shorter wave-lengths. Earlier measurements I have made¹ with the elements 12 (Mg), 13 (Al) and 14 (Si), which were carried out with special regard to the effects from oxygen and fluorine on the K_1,2-doublet, have recently been extended by measurements with sodium. No conclusive evidence of any displacement in either direction could be found. These and previous results are summarized in the accompanying table; the measurements on the oxygen compounds of phosphorus, sulphur and chlorine were made by Lundquist².