Rotational Zeeman effect and Coriolis coupling in NeHCl and KrHCl

Abstract

The rotational Zeeman effect has been measured for NeHCl and KrHCl. For NeH ³⁵Cl we obtain g _⊥ = -0·00037(11). For ⁸⁴KrH ³⁵Cl we obtain g _⊥ = -0·00118(4), and x _‖ - x _⊥ = -1·17(29) × 10^-10 MHz/G². Analysis of the rotational g-values leads to determination of the Coriolis coupling function f(<cos² θ>). For KrHCl the result is f = 0·777(28), in good agreement with the result of 0·79(14) estimated from earlier measurements by Howard and co-workers of the chlorine spin-rotation constant in KrHCl. For NeHCl the result is f = 0·102(40). These f results are in agreement with the predictions of a semi-empirical calculation developed in a previous study of the rotational Zeeman effect in ArHBr. Zero field spectra of the J = 1 →2 transition for NeH ³⁵Cl are also reported.