Case c doublet state molecules

In this diagram we have included the chlorine hyperfine splitting, which arises from both magnetic and electric quadrupole interactions. Chlorine possesses two important naturally occurring isotopes, 35C1 and 37C1, which have similar magnetic and electric moments both isotopomers are observed in the experiments. 

The axial component of the total magnetic hyperfine interaction, A 3/2, in the 2n3/2 component is equal to a+ (b + c)/2, where a, b and c are the Frosch and Foley [192] constants. In the 2n1/2 component the axial hyperfine constant, h /2, is equal to a — (b + c)/2. Since both fine-structure components can usually be studied by pure microwave experiments, a partial separation of the magnetic hyperfine constants can be achieved. The electric quadrupole coupling constant, eq0 Q, is obtained for both isotopes. 

In table 10.22 we have summarised the data obtained for a number of different2 n molecules, from a combination of magnetic resonance studies involving the Zeeman components of a single rotational level, and pure microwave to far-infrared studies of transitions between rotational levels. We remind ourselves of the definitions of the 

The axial component of the total magnetic hyperfine interaction, /j3/2 in the Il3/2 component is equal to a + + c)/2, where a, b and c are the Frosch and Foley 

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Case (c) doublet state molecules 10.7.1. Studies of the HeAr+ ion... 

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