A molecular-beam-optical and radio frequency-optical double-resonance study of the A 2Πr–X 2Σ+ band system of scandium monoxide

Abstract

A molecular-beam-optical and rf-optical double-resonance study of the A 2 Π (v′=0–2) –X 2Σ+ (v″=0–2) band systems of gas phase scandium monoxide has been performed. No localized perturbations in the X 2Σ+ state have been observed but strong perturbations in the A 2 Πr (v=1) state were detected. Quantum numbers for the optical spectrum could only be assigned assuming a negative value for the excited state Λ-doubling-type magnetic hyperfine parameter, contrary to current theoretical understanding of this interaction. The ground state magnetic hyperfine parameters can be interpreted in terms of ab initio models for the electronic states of ScO whereas the spin-rotation parameters cannot.

The Hyperfine Structures of ScCl and ScF

“…It is perhaps also interesting to compare the experimental difference between eQq of ScF and ScO with those obtained from interpretation of the experimental magnetic hyperfine parameters of ScO (34). In this case it was deduced from the Fermi contact parameter that the 3 orbital has 69% 4s (and thus 31% 4p) character, in very good agreement with the recent ab initio result (33).…”

The pure rotational spectrum of ZnS (X1Σ+)

“…This is especially true when there are several other nearby potentials. In that case, the potential energy curve of interest [5][6][7][8][9][10][11][12][13][14][44][45][46][47][48][49][50][51][52]. The trends are similar in both series, but there are variations, particularly from Mn to Zn.…”

“…For example, the oxide and fluoride series have been well characterized [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. In general, however, zinc-bearing species have been neglected in such investigations, which tend to focus exclusively on scandium through copper.…”

A study of the A2Π–X2Σ+ and B2Σ+–X2Σ+ band systems of scandium monosulfide, ScS, using Fourier transform emission spectroscopy and laser excitation spectroscopy

“…The two sets of parameters are in reasonably good agreement and the differences can be attributed to the improved wavenumber determination and the re-assignment of some of the weaker features. Also presented in Table 2 is a comparison of the ScS spectroscopic parameters with those for X 2 R + [14,19], A 2 P [14,20] and B 2 R + [21] states of ScO.…”