Spin–orbit state selectivity in KrF*and XeF* formation from ion-recombination reactions of Kr+(2P3/2,1/2) and Xe+(2P3/2,1/2) with SF−6 in the flowing afterglow

Abstract
Appropriate filter gases have been used to select one of the spin–orbit levels of Kr+ and Xe+, 2P3/2 or 2P1/2 , in a flowing afterglow reactor. The separated reactions of Kr+ and Xe+ in the 2P3/2 and 2P1/2 levels with SF6 were examined at 300 K by observation of KrF* and XeF* formation. The Kr+ and Xe+ ions in the 2P3/2 level give only the B and C states, while those in the 2P1/2 level give the B and D states. The B:C distributions from Kr+(2P3/2) and Xe+(2P3/2) were estimated to be 0.62:0.38 and 0.68:0.32, respectively, while the B:D distributions from Kr+(2P1/2) and Xe+(2P1/2) were measured as 0.05:0.95 and 0.06:0.94. The high spin–orbit state selectively can be generally explained by the conservation of the Rg+(2P3/2)+F and Rg+(2P1/2)+F characters.