Rotational intensity anomalies

The HCP case exhibits one additional signal of the onset of rapid change in vibrational resonance structure. This is the sudden onset of vibrational perturbations at (0, 32, 0) [5]. Local perturbations, where one rotational term curve crosses another, are manifest as level shifts, extra lines, and intensity anomalies [18]. Such perturbations are typically rare at low vib and... 

As noted in Section 8.1.2, numerous intensity anomalies are observed in ZEKE spectra. Most of them are due to autoionization. For the effects of rotational, vibrational, and electronic autoionizations, we refer to the work of Merkt and... 

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