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High-Resolution Laser Excitation Spectroscopy of theB̃2Σ+–X̃2Σ+System of Jet-Cooled SrOD

✍ Scribed by C. Zhao; P.G. Hajigeorgiou; P.F. Bernath; J.W. Hepburn

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
221 KB
Volume
176
Category
Article
ISSN
0022-2852

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✦ Synopsis

The high-resolution laser excitation spectrum of the 001-000 and 000-000 bands of the B ˜2S / -X ˜2S / transition of SrOD was recorded. The SrOD molecules were made by pulsed laser ablation of Sr metal followed by reaction with D 2 O. Sub-Doppler resolution and rotational cooling were achieved by expansion into vacuum and excitation with a cw dye laser perpendicular to the molecular beam. A molecular linewidth of 200 MHz and the lack of spectral congestion allowed a Q branch to be detected. Spin-orbit mixing between the A ˜2P and B ˜2S / states caused the unusual appearance of a moderate intensity Q branch in a nominally parallel 2 S / -2 S / transition. From the relative intensities of the rotational lines, the ratio of the perpendicular to the parallel transition dipole moment was found to be 0.2 to 0.3.

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