Born–Oppenheimer breakdown effects and hyperfine structure in the rotational spectrum of strontium monosulfide, SrS
摘要:
A newly constructed Fourier transform microwave spectrometer has been used to record the pure rotational spectra of four isotopomers of SrS ((SrS)-Sr-88-S-32, (SrS)-Sr-87-S-32, (SrS)-Sr-86-S-32, and Sr-88 S-34) between 6 and 26 GHz. The molecules were produced by reacting laser ablated strontium with carbonyl sulfide (0.1% in argon). Pure rotational transitions in the ground, first and second vibrational states have been observed. The data set has enabled a multi-isotopomer fit. Born-Oppenheimer breakdown terms for both atoms have been determined. The Sr-87 nuclear quadrupole coupling constant in (SrS)-Sr-87-S-32 has been determined for the first time. (C) 2007 Elsevier B.V. All rights reserved.