In:
Canadian Journal of Physics, Canadian Science Publishing, Vol. 42, No. 5 ( 1964-05-01), p. 848-859
Abstract:
High-dispersion plates of the NO absorption spectrum have been studied between 1600 and 1390 Å for the three isotopic molecules N 14 O 16 , N 15 O 16 , and N 14 O 18 , and G 2 Σ − –X 2 Π bands were sorted out from the many overlapping bands in the spectrum. The well-defined band system satisfies the established isotope relations. In contrast with most of the other known NO band systems G 2 Σ − –X 2 Π shows almost no perturbations. Vibrational and rotational analyses gave the following constants for the G 2 Σ − state of N 14 O 16 : T e = 62911.7 cm −1 ; ω e = 1085.54 cm −1 , ω e x e = 11.083 cm −1 , ω e y e = −0.1439 cm −1 , B e = 1.2523 cm −1 , α e = 0.0204 cm −1 , γ e = 1.3426 Å. The combination defect observed in the G 2 Σ − –X 2 Π bands agrees with the defect found in the A 2 Σ + –X 2 Π(γ) bands except in sign, which is opposite. Therefore, the symmetry of the G state is confirmed as 2 Σ − . The "pure precession" relation between G 2 Σ − and X 2 Π is found to hold for the Λ-type doubling of X 2 Π. The diffuse structure of the band assigned to ν = 10 indicates that G 2 Σ − is predissociated by a repulsive 2 Σ − state dissociating into 2 D(N)+ 3 P(O) atoms at 71660 cm −1 . The dissociation energy and electron configuration for G 2 Σ − are discussed.
Type of Medium:
Online Resource
ISSN:
0008-4204
,
1208-6045
Language:
English
Publisher:
Canadian Science Publishing
Publication Date:
1964
detail.hit.zdb_id:
2021497-2
