Pressure Effects of Foreign Gases on the Absorption Lines of Cesium. VII. The Shift of High-Member Lines by Various Rare Gases

Abstract

The observed behavior of the shift of the third- and higher-member lines (up to the 25th member) of the Cs principal series produced under various pressures (up to a relative density of ∼6) of all rare gases is described. A comparison of the shifts of various lines was made. The red shifts of Cs(3) and Cs(4) are nearly the same for Ar, Kr, and Xe when the relative density (rd) is below 0.6 and become increasingly different when the rd is increased. For He and Ne, the blue shift of the ${}_{}{}^2{}_{}{}^{}P_{\frac{1}{2}}^{}{}_{}{}^{}$ component of Cs(3) is greater than that of the ${}_{}{}^2{}_{}{}^{}P_{\frac{3}{2}}^{}{}_{}{}^{}$ component, while for Cs(4) the shift is greater, although the difference in shift of the two doublet components is much reduced. The slopes of the plots of the asymptotic values of shifts for high-member lines versus rd are 5.85, 0.366, -10.04, -19.6, and -35.0 ${\mathrm{cm}}^{-1\mathrm{}}$/rd for He, Ne, Ar, Kr, and Xe, respectively.