Towards an understanding of the helium-acetylene van der Waals complex

摘要

The weakly bound complex He-C₂D₂ is studied in the ν ₃ fundamental band of C₂D₂ (≈2440 cm−1) using a tuneable infrared diode laser to probe a pulsed supersonic slit jet expansion. This is the first published spectrum for helium-acetylene. Transitions observed in the region of the C₂D₂ R(0) line are assigned with the help of theoretical results based on an ab initio intermolecular potential, and fitted using a simple Coriolis model. The results indicate that the complex is rather close to the free rotor limit, helping to explain the absence of previous data. Scaled parameters from the model are used to predict a spectrum for He-C₂H₂.View full textDownload full textKeywordshelium, acetylene, dimer, spectroscopy, infrared, van der WaalsRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00268976.2012.699108