85 vibration- rotation coupling molecular beams

In addition to NMR spectra, microwave spectra also may provide information on the spin-spin coupling (Vaara et al. 2002). In particular, for diatomic molecules accurate data can be obtained from molecular beam electric and magnetic resonance when the splitting of a single rotational-vibrational state can be observed. One of the parameters of this splitting (usually called C4) is equal to the isotropic value of the indirect spin-spin coupling tensor, another one (C3) depends both on the direct coupling (oc and on the anisotropy of the tensor. 

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