TY - JOUR
T1 - A study of the A2Π-X2Σ+ and B2Σ+-X2Σ+ band systems of scandium monosulfide, ScS, using Fourier transform emission spectroscopy and laser excitation spectroscopy
AU - Gengler, Jamie
AU - Chen, Jinhai
AU - Steimle, Timothy
AU - Ram, R. S.
AU - Bernath, P. F.
N1 - Funding Information:
We thank M. Dulick and D. Branston of the National Solar Observatory for assistance in obtaining the Fourier transform spectra. The National Solar Observatory is operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation. The research described here was supported by funding from NASA laboratory astrophysics program. Some support was also provided by National Science Foundation-Experimental Physical Chemistry (CHE 0317130) and the Natural Sciences and Engineering Research Council of Canada.
PY - 2006/5
Y1 - 2006/5
N2 - Emission spectra of the A2Π3/2-X2Σ+ (0, 1), (0, 0), and (1, 0) bands and the B2Σ+-X2Σ+ (0, 1), (0, 0), (1, 0), (2, 0), and (3, 1) bands of ScS have been recorded in the 10 000-13 500 cm-1 region at a resolution of 0.05 cm-1 using a Fourier transform (FT) spectrometer. The A2Πr-X2Σ+ (1, 0) band as well as the B2Σ+-X2Σ+ (0, 0) and (1, 0) bands have been recorded at high resolution (±0.001 cm-1) by laser excitation spectroscopy using a supersonic molecular beam source. The FT spectral features range up to N = 148, while those recorded with the laser cover the "low-N" regions. The lines recorded with the laser exhibit splittings due to the 45Sc (I = 7/2) magnetic hyperfine interactions, which are large (∼6.65 GHz) in the X2Σ+ state and much smaller in the B2Σ+ and A2Π states. The energy levels were modeled using a traditional 'effective' Hamiltonian approach, and improved spectroscopic constants were extracted and compared with previous determinations and theoretical predictions.
AB - Emission spectra of the A2Π3/2-X2Σ+ (0, 1), (0, 0), and (1, 0) bands and the B2Σ+-X2Σ+ (0, 1), (0, 0), (1, 0), (2, 0), and (3, 1) bands of ScS have been recorded in the 10 000-13 500 cm-1 region at a resolution of 0.05 cm-1 using a Fourier transform (FT) spectrometer. The A2Πr-X2Σ+ (1, 0) band as well as the B2Σ+-X2Σ+ (0, 0) and (1, 0) bands have been recorded at high resolution (±0.001 cm-1) by laser excitation spectroscopy using a supersonic molecular beam source. The FT spectral features range up to N = 148, while those recorded with the laser cover the "low-N" regions. The lines recorded with the laser exhibit splittings due to the 45Sc (I = 7/2) magnetic hyperfine interactions, which are large (∼6.65 GHz) in the X2Σ+ state and much smaller in the B2Σ+ and A2Π states. The energy levels were modeled using a traditional 'effective' Hamiltonian approach, and improved spectroscopic constants were extracted and compared with previous determinations and theoretical predictions.
KW - Fourier transform emission
KW - Laser excitation spectroscopy
KW - Scandium monosulfide
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U2 - 10.1016/j.jms.2006.02.006
DO - 10.1016/j.jms.2006.02.006
M3 - Article
AN - SCOPUS:33646205439
SN - 0022-2852
VL - 237
SP - 36
EP - 45
JO - Journal of molecular spectroscopy
JF - Journal of molecular spectroscopy
IS - 1
ER -