Browsing Abstracts of OSU International Symposium on Molecular Spectroscopy 1990-1999 by Title
Now showing results 3884-3903 of 3912
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WATER CLUSTERS
Saykally, R. J. ( 1998 )Clusters of $H_{2}O$ and $D_{2}O$ as large as hexamer (and possibly octamer) have been studied in much detail by terahertz laser VRT $spectroscopy.^{a}$ Torsional and bifurcation dynamics of the quasiplanar ring clusters ... -
WATER ON THE SUN
Bernath, P. F.; Wallace, Lloyd; Livingston, W.; Hinkle, Kenneth H.; Busler, J.; Guo, B.; Zhang, K. Q. ( 1995 )High resolution infrared spectra of sunspot umbrae have been recorded with the 1-m Fourier transform spectrometer on Kitt Peak. The spectra contain a very large number of water absorption features originating on the sun. ... -
WATER ON THE SUN: A NEW SPECTROSCOPIC PARADIGM
Polyansky, Oleg L.; Zobov, N. F.; Viti, Serena; Tennyson, Jonathan; Bernath, P. F.; Wallace, Lloyd ( 1997 )Sunspot infrared absorption spectra with $T \sim 3000^\circ$ and $750 \leq \bar{\nu} \leq 1010 cm^{-1}$ have recently been $reported^{a}$. The spectra are highly congested ($\sim$ 50 lines per $cm^{-1}$) with spectral ... -
WATER VAPOR ABSORPTION IN ATMOSPHERIC WINDOWS IN THE MILLIMETER WAVE RANGE
Bauer, A.; Godon, M.; Carlier, J. ( 1993 )Laboratory experiments using a Fabry Perot interferometer have allowed the determination of the water vapor absorption coefficient at different frequencies in the gaps between rotational lines in the millimeter wave range. ... -
WATER VAPOR CONTINUUM IN THE $1300-2200 cm^{-1}$ REGION
Tobin, Dave C.; Strow, L. L.; Lafferty, W. J.; Olson, W. B. ( 1995 )Water vapor transmission spectra in the $1300-2200 cm^{-1}$ region were recorded using a BOMEM fourier transform spectrometer at resolutions of 0.01, 0.04, and $2.00 cm^{-1}$. Self-, nitrogen-, and oxygen-broadened spectra ... -
WATER VAPOR FROM $600 cm^{-1}$ THROUGH THE $\nu_{2}$ BAND
Toth, R. A. ( 1995 )Recent measurements of ${H_{2}}^{16}O$ were made using the $0.005 cm^{-1}$ resolution FTS at the Kitt Peak McMath facility. The results from the analysis include improved values of the ground and $\nu_{2}$ state rotational ... -
WATER VAPOR LINE PARAMETER MEASUREMENTS AT 1.5 AND $1.9 \mu$m
Hawkins, R. L.; Phillips, Bill ( 1998 )High-resolution $(0.008 cm^{-1})$ Fourier transform spectra of water vapor were measured in the 1.5 and $1.9 \mu$m regions. Some 733 absorption lines were fit by nonlinear least squares, yielding line positions, intensities ... -
THE WATER VAPOR LINESHIFT INVESTIGATIONS AT $5\mu m$ REGION
Valentin, A.; Rachet, F.; Bykov, A. D.; Lavrent'eva, N.; Savel'ev, V.; Sinitsa, L. ( 1995 )Water vapor lineshifts induced by nitrogen pressure have been measured using FT-spectrometer with multi-pass absorption cell at $0.0025 cm^{-1}$ resolution in $1850 - 2230 cm^{-1}$ spectral region. The measurements have ... -
THE WAVELENGTH DEPENDENCE OF THE PHOTOLYSIS OF N-PENTALDEHYDE
Zhu, L.; Cronin, Thomas J. ( 1998 )Aldehydes are pollutants formed from atmospheric photo-oxidation of hydrocarbons. Photodissociation of aldehydes represents a significant source of free radicals in the lower atmosphere. We have studied the uv photolysis ... -
A WAVELENGTH METER FOR INFRARED DIODE LASER
Hirota, Eizi; Hayakawa, Kazuo; Okunishi, Misaki; Yamada, Chikashi ( 1994 )In order to facilitate spectroscopy using infrared diode lasers as sources, we have constructed a wavelength meter which readily allows us to determine the wavenumber of a laser line to an accuracy of $0.1 cm^{-1}$. This ... -
WAVENUMBER STANDARDS IN THE $9-22 \mu m$ REGION.
Johns, J. W. C. ( 1990 )Bands of $OCS, C_{2}H_{2}, CO_{2}$ and $N_{2}O$ have been recorded with a Fourier transform spectrophotometer at a resolution (FWHM of the instrument function) of $0.0014 cm^{-1}$. The wavenumbers were calibrated using the ... -
THE WEAKLY-BOUND COMPLEX $CH_{4}-H_{2}$: OBSERVATION AND ANALYSIS OF INFRARED SPECTRA IN THE 350 AND $1311 cm^{-1}$ REGIONS
McKellar, A. R. W.; Roth, D. A.; Pak, I.; Winnewisser, G. ( 1999 )Infrared spectra of the weakly-bound van der Waals complex $CH_{4}-paraH_{2}$ have been observed and analyzed for the first time. Measurements were made using a long path $(160-180 m)$ low temperature $(61-92 K)$ absorption ... -
WHAT DO HIGH TEMPERATURE KINETIC MEASUREMENTS OF ACETYLENE PYROLYSIS TELL US ABOUT THE HEAT OF FORMATION OF $C_{2}H$?
Kern, R. D.; Xie, K.; Kiefer, J. H. ( 1990 )Reaction profiles for $C_{2}H_{2} C_{4}H_{2}$, and $C_{6}H_{1}$ were obtained by dynamic analysis of the reflected shock zone gas by time-of-flight mass spectrometry over the temperature range $1880-2620 K$ at total reaction ... -
WHAT IS THE $B'$ STATE OF $Na_{3}$?
Golonzka, Oleg; Ernst, Wolfgang E. ( 1998 )In the visible wavelength region, four electronic transitions of the sodium trimer were detected by Broyer $et al.^{a}$ While the $A - X$ and $B - X$ systems were studied at rotational $resolution^{b}$, the $B' - X$ bands ... -
WHAT MAKES WATER WET? TERAHERTZ AND IR CAVITY RINGDOWN SPECTROSCOPY RESULTS FOR WATER CLUSTERS
Saykally, R. J. ( 1999 )Vibration-Rotation-Tunneling (VRT) spectra have been measured and analyzed for water clusters as large as hexamer, using cw terahertz laser $technology.^{a}$ Force fields, structures, and hydrogen bond rearrangement tunneling ... -
What's new on YH
Simard, B.; Balfour, W. J.; Niki, H.; Hackett, P. A. ( 1990 )The YH molecule has been generated in a molecular beam apparatus employing laser vaporization, and its visible spectrum has been re-investigated at low and high resolution. Several $^{1}\Sigma-^{1}\Sigma$ and $^{1}\Pi-^{1}\Sigma$ ... -
WHERE DOES THE DIMETHYL ETHER INTERNAL ROTATION BARRIER COME FROM?
Pophristic, Vojislava; Goodman, Lionel ( 1996 )The barrier to methyle internal rotation in dimethyle ether is analysed through decomposition of the barrier energy by symmety partitioning and natural bond orbital analysis. The largest single contribution to the barrier ... -
WHITE CELL DESIGN FOR FIR FOURIER TRANSFORM SPECTROSCOPY OF TRANSIENT SPECIES
Von Bargen, Albrecht; Birk, M. ( 1995 )In order to extend the capability of our Fourier transform spectrometer (Bruker IFS 120HR) we have constructed a White type absorption cell with respect to an optimal use in combination with the FTS in the FIR spectral ... -
WIGNER DVR: A NEW METHOD FOR THE CALCULATION OF VRT DYNAMICS OF VAN DER WAALS CLUSTERS
Braly, L. B.; Saykally, R. J.; LeForestier, Claude L. ( 1995 )Given the existence of a large body of precise spectroscopic data for weakly bound $complexes^{1}$, the determination of multidimensional intermolecular potential energy surfaces (IPS's) has been limited by available ... -
$X^{+} (X=Ar, Kr, N_{2}) + H_{2}O$ charge-transfer luminescence: Vibrationally-selected $H_{2}O^{+} \tilde{A} - \tilde{X}$ emissions
Dessler, Rainer A.; Arnold, S. T.; Gardner, J. A.; Murad, Edmond ( 1994 )Exothermic low-energy (1-20 $eV^{+}$ c.m.) charge-transfer reactions are primarily governed by the energy resonance criterion. They thus offer a convenient means of producing ions in a narrow energy range of rovibronic ...