Theoretical Studies On P-branch High-lying Rovibrational Spectra Of AlO Diatomic Molecule

The quantum structures and spectroscopic information of diatomic systems play very important roles in astrophysics、laser physics and earth science. AlO molecule is an interesting subject. The knowledge of high-lying rovibrational transition spectral lines of AlO molecule is important for understanding its microstructures.Base on the known rotational constants and some experimental transitional spectral lines, the P-branch high-lying rovibrational spectral lines of (2,3),(4,3) and (5,6) bands of B∑+-X∑+transition of AlO molecule are accurately predicted using the new formulae proposed by Sun et al.The theoretical spectral lines not only reproduce all known experimental transition lines, but also correctly predict the high-lying spectral lines up to rotational quantum number J=80that are not available experimentally. The excellent agreement between experimental and theoretical results, and the physical trend of the predicted spectral lines show that the predicted lines are correct, and may provide necessary physical data for related scientific studies.