Rydberg states of NO in a magnetic field: Multichannel quantum defect approach of the linear Zeeman effect

Raoult, Maurice; Guizard, Stéphane; Gauyacq, Dolores
December 1991
Journal of Chemical Physics;12/15/1991, Vol. 95 Issue 12, p8853
Academic Journal
The linear Zeeman effect for the nf and np Rydberg states of NO has been analyzed in the intermediate energy region (n=7 and n=15). This analysis is based on a multichannel quantum defect treatment (MQDT), including the magnetic interaction, as proposed by Monteiro and Taylor [T. S. Monteiro and K. T. Taylor, J. Phys. B: At. Mol. Phys. 22, L191 (1989)]. The nonpenetrating nf states exhibit almost no channel mixing, but they are significantly perturbed by the Zeeman interaction within each rotational channel in a moderate field of 1 T. An excellent agreement has been found between the experimental results obtained in a 1 T magnetic field and the calculations, showing in particular the first manifestation of the Paschen–Back effect in a molecule. The penetrating np states of NO exhibit channel interaction, but, on the other hand, they are less perturbed by a 1 T magnetic field than the nf states are. Theoretical predictions have been made for a larger field strength of 5 T in the case of the 7p and 15p states.


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