Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5427186 | Journal of Quantitative Spectroscopy and Radiative Transfer | 2017 | 9 Pages |
â¢VIS Fourier transform emission spectroscopy was applied.â¢High-resolution spectra of the A?X and C?A systems of AlD were recorded.â¢Global fit of the pure rotational, ro-vibrational and electronic spectroscopic data of AlD was made.â¢Improved molecular constants of the X-, A- and C-states of AlD were obtained.â¢New ab initio potentials for the X-, A- and C- states including spin-orbit coupling calculated.
The emission spectrum of the AlD isotopologue has been experimentally studied using Fourier transform spectroscopy in the 17,700â28,500 cmâ1 spectral region. AlD molecules were produced within an aluminum hollow-cathode lamp with two anodes in the presence of 2.7 Torr of Ne and 0.2 Torr of ND3. The observed bands have been assigned to the A 1Î â X 1Σ+ (0â0,1 and 1â0,1,2,3 bands) and C 1Σ+â A 1Î (0â0 and 1â1 bands) transitions. In total, more than 450 rotational frequencies were measured with an absolute accuracy of about 0.002 cmâ1. The current data have been combined with available measurements of the pure rotational lines by Halfen and Ziurys [Astrophys J 2010; 713: 520-523] and with the ro-vibrational bands by White et al. [J Chem Phys 1993;99:8371-8378] to provide improved spectroscopic constants of the X 1Σ+, A 1Î and C 1Σ+ states of AlD. These results match closely theoretical values obtained using a new set of ab initio potentials calculated with a spin-orbit Hamiltonian.
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