dc.creator Bailleux, S. en_US dc.creator Harada, Kensuke en_US dc.creator Mizoguchi, A. en_US dc.creator Tanaka, Keiichi en_US dc.date.accessioned 2006-06-15T19:18:06Z dc.date.available 2006-06-15T19:18:06Z dc.date.issued 1999 en_US dc.identifier 1999-RG-14 en_US dc.identifier.uri http://hdl.handle.net/1811/19376 dc.description $^{a}$ K. Uemura. A. Hara, and K. Tanaka, J. Chem. Phys., 104, 9747 (1996). $^{b}$ M. Shirasaka, and K. Tanaka, J. Mol. Spec., 185, 189 (1997). en_US dc.description Author Institution: Institute for Molecular Science (IMS) en_US dc.description.abstract In order to understand the potential energy surface of the very floppy Ar-HCN $cluster^{a}$, it is essential to observe the van der Waals vibrational bands of the deuterated species, $Ar-DCN^{b}$. We have applied the millimeter-wave absorption spectroscopy combined with the pulsed-jet expansion technique to the measurement of ro-vibrational transitions of the $\Sigma_{1}\leftarrow \Sigma_{0}$ and $\Pi_{1}\leftarrow\Sigma_{0}$ subbands of Ar-DCN between 182 and 294 GHz. We found that diluting DCN (2\%) in a mixture of Ar and Ne (up to 50\%) lead to a 5 times greater signal-to-noise ration compared to DCN diluted in pure Ar. Moreover, Ne also contributes to reducing the line width (250 kHz FWHM). In total, 53 rovibrational transitions split into hyperfine components due to the Nitrogen nucleus were observed, leading to an accurate determination of the molecular parameters. The subband origins are determined to be 189017.3969(98) and 195550.745(18), and the rotational constants are $B = 1926.8792(24)$ and $B = 1967.8744(20)$ in the $\Sigma_{1}$ and $II_{1}$ bands, respectively (all constants in MHz). Other parameters also include the quadrupole coupling constants, the Coriolis coupling constans between the $\Sigma_{1}$ and $II_{1}$ bending bands. The intensities of the P- and R-branch of these two bands are strongly affected by the Coriolis interaction. en_US dc.format.extent 151138 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title OBSERVATION OF THE VAN DER WAALS BENDING BANDS OF THE Ar-DCN CLUSTER BY MILLIMETER-WAVE SPECTROSCOPY IN SUPERSONIC JET EXPANSION en_US dc.type article en_US
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