OSU Navigation Bar

The Ohio State University University Libraries Knowledge Bank

HIGH RESOLUTION VACUUM ULTRAVIOLET STUDIES OF $A^{1}A HCN$

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/18120

Show full item record

Files Size Format View
1990-MG-04.jpg 77.78Kb JPEG image Thumbnail of HIGH RESOLUTION VACUUM ULTRAVIOLET STUDIES OF $A^{1}A HCN$

Title: HIGH RESOLUTION VACUUM ULTRAVIOLET STUDIES OF $A^{1}A HCN$
Creators: Jonas, D. M.; Zhao, X.; Solina, Stephani Ann B.; Yamanouchi, K.; Field, R. W.
Issue Date: 1990
Abstract: The $\tilde{A}-\tilde{X}$ fluorescence excitation spectrum of HCN has been recorded using 4-wave mixing in Sr vapor as a tunable vacuum ultraviolet source. The excitation spectra are notable for the high signal to noise ratio, resolution of nearly all previously blended lines(FWHM $\sim 0.3cm^{-1})$ and absolute wavenumber accuracy($0.03cm^{-1}$). Measured lifetimes for the first three bending levels of the $\tilde{A}$ state $[\tau (000)^{1}=13\pm 7ns, \tau(010)^{1}=130 \pm 24ns, \tau(020)^{1}<2ns]$ qualitatively confirm the unusual trend in predissociation lifetimes reported by Hsu $et al. ^{1}$ Stem-Volmer fluorescence quenching studies reported here yield a best fit quenching constant for the $\tilde{A}(000)^{1}$ level of $K_{q}=73 \mu s/Torr$, which is of the same order of magnitude as the previously reported quenching constant for the $A(010)^{1}$ level. Stark effect measurements of the $\tilde{A}$-state electric dipole moment now in progress will also be reported.
URI: http://hdl.handle.net/1811/18120
Other Identifiers: 1990-MG-4
Bookmark and Share