Browsing Abstracts of OSU International Symposium on Molecular Spectroscopy 1990-1999 by Title
Now showing results 1770-1789 of 3912
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$K \neq 0$ TRANSITIONS IN THE ROTATIONAL SPECTRUM OF Ar-HCN
Germann, T. C.; Emilsson, T.; Gutowsky, H. S. ( 1991 )The Ar-HCN dimer has been $described^{1}$ as ``a highly nonrigid molecule, with several spectroscopic anomalies attributed to strong angular--radial coupling in the interaction $potential.^{1-4}$ In earlier work only $K=0$ ... -
A "KEYHOLE" MODEL OF IVR TO ACCOUNT FOR THE CONTRASTING EIGENSTATE-RESOLVED INFRARED SPECTRA OF 1-BUTYNE AND ETHANOL
Perry, David S. ( 1990 )Recent molecular eigenstate-resolved infrared spectra 1-butyne1-2 and ethanol have given insight into the nature of the couplings responsible for intramolecular vibrational redistribution (IVR) at low energies. In the ... -
KINEMATIC EFFECTS IN INELASTIC COLLISIONS WITH $S_{1}$ GLYOXAL $(0^{0}, K' = 0)$ IN CROSSED MOLECULAR BEAMS.
Burrill, A. B.; Clegg, Samuel M.; Weida, M. J.; Parmenter, C. S. ( 1997 )Crossed beam inelastic scattering from $S_{1}$ glyoxal (CHO-CHO) collisions with cyclopropane $(C_{3}H_{6})$, and cyclohexane $(C_{6}H_{12})$ are now added to an already extensive collection of collision partners. A laser ... -
KINETIC ENERGY DISTRIBUTION AND THE FORMATION MECHANISM OF $D_{3}$ IN A HOLLOW CATHODE DISCHARGE OF $D_{2}$
Amano, T.; Chan, Man-Chor ( 1993 )Herzberg and coworkers discovered the electronic transitions of $H_{3}$ and $D_{3}$ in emission in the visible and infrared regions in the cathode glow of cooled hollow cathode discharges, and several Rydberg states of ... -
KINETIC MICROWAVE SPECTROSCOPY OF RADICALS PRODUCED BY EXCIMER LASER PHOTOLYSIS.
Hassouna, M.; Walters, Adam; Demuynch, C.; Bogey, M. ( 1999 )UV-laser photolysis is a highly selective method for creating radicals for study by microwave absorption spectroscopy. Unfortunately, if traditional ``time-averaged'' frequency scanning is employed the radical spectrum is ... -
KINETIC SPECTROSCOPY OF THE NCl $b^{1}\Sigma^{+}-X^{3}\Sigma^{-}$ $TRANSITION^{a}$
Komissarov, Anatoly V.; Heaven, M. C.; Davis, S. J.; Manke, Gerry C. II ( 1999 )Renewed interest in the low-lying metastable electronic states of NCl has been generated by the realization that $NCl(a^{1}\Delta)$ may be used as energy carrier in chemical laser $devices^{a}$. In order to characterize ... -
KINETICS OF DISSOCIATIVE CYCLIZATION OF HYDROPEROXYL RADICALS
Chan, Wai-To; Pritchard, Huw O.; Hamilton, I. P. ( 1999 )Isomerization of peroxyl radicals ROO via hydrogen self-abstraction to form hydroperoxyl radicals QOOH (eg. $CH_{3}CH_{2}OO \to CH_{2}CH_{2}OOH$) is a crucial step in hydrocarbon combustion. However, the kinetic measurements ... -
KINETICS OF VIBRATIONAL UP-PUMPING STUDIED BY STEP-SCAN FOURIER TRANSFORM SPECTROSCOPY
Plonjes, E.; Palm, P.; Adamovich, I.; Rich, J. W.; Urban, W. ( 1997 )Gaseous CO in an Ar diluent is prepared in vibrational state $v = 1$ by absorption of pulsed CO laser radiation. Energy subsequently diffuses into higher vibrational states (to $v = 40$) by vibration-to-vibration exchange ... -
LABORATORY AND ASTRONOMICAL DETECTION OF RHOMBOIDAL $SiC_{3}$
Apponi, A. J.; McCarthy, M. C.; Gottlieb, C. A.; Thaddeus, P. ( 1999 )The rotational spectrum of rhomboidal $SiC_{3}$ in its $^{1}A_{1}$ electronic ground state was measured in a laboratory discharge of silane and acetylene by Fourier transform microwave spectroscopy and direct absorption ... -
LABORATORY DETECTION OF THE CARBON CHAINS $HC_{15}N AND HC_{17}N$
McCarthy, M. C.; Grabow, Jens-Uwe; Travers, Michael J.; Chen, Wei; Gottlieb, C. A.; Thaddeus, P. ( 1998 )The linear cyanopolyynes $HC_{15}N$ and $HC_{17}N$ were detected in the laboratory by Fourier-transform microwave spectroscopy. Enough rotational lines of each species were measured in the 5-11 GHz frequency range so that ... -
LABORATORY DETECTION OF THE NEW CARBON CHAIN RADICAL $H_{2}CCCCN$
Chen, Wei; McCarthy, M. C.; Travers, Michael J.; Thaddeus, P.; Gottlieb, Elaine W.; Gottlieb, C. A.; Munrow, Michaeleen R.; Novick, Stewart E. ( 1997 )The cyanomethyl radical, $H_{2} CCN$, was first found in the interstellar medium and then detected in the laboratory in 1988, however, the longer members of this sequence have remained undetected. We report the first ... -
LABORATORY DETECTION OF THE RING-CHAIN MOLECULE $C_{5}H_{2}$
Travers, Michael J.; McCarthy, M. C.; Gottlieb, C. A.; Thaddeus, P. ( 1997 )The highly polar ring-chain ethynylcyclopropenylidene, $C_{5}H_{2}$ [i.e., $c-C_{3}H(CCH)$], a carbene with a singlet electronic ground state, has been detected with a Fourier transform molecular beam microwave spectrometer ... -
LABORATORY EVIDENCE FOR THE NATURE OF THE CARRIERS OF SOME DIFFUSE INTERSTELLAR BANDS
Maier, John P. ( 1994 )Electronic absorption spectra of highly unsaturated hydrocarbons embedded in 5 K neon matrices suggest that these species may be the carriers of some of the known diffuse interstellar bands. The laboratory data have been ... -
LABORATORY MEASUREMENTS OF IR MOLECULAR ION ABSORPTION INTENSITIES
Coe, James V. ( 1992 )Primarily due to infrared laser spectroscopic techniques a fairly extensive data set including frequency measurements, band origins, and structures now exists for over 60 molecular ions. However, there is only very limited ... -
LABORATORY SPECTROSCOPY OF THE $C_{7}H$ AND $C_{2}H$ RADICALS
McCarthy, M. C.; Travers, Michael J.; Thaddeus, P. ( 1996 )The linear carbon chain radicals $C_{7}H$ and $C_{8}H$ have been detected in their $^{2}H$ electronic ground states in an acetylene/argon discharge. For each radical, both spin-orbit components have been detected, precise ... -
LAMBDA-DOUBLET PROPENSITIES OF NO $(X^{2}\Pi)$ IN ROTATIONALLY INELASTIC SCATTERING BY Ar AT 212 meV
Lin, Ao; Antonova, Stiliana; Tsakotellis, Antonis P.; McBane, George C. ( 1998 )A rotationally inelastic scattering experiment of NO with Ar was done at a (Center Of Mass) collision energy of 212 meV. NO $(X^{2}\Pi)$ was prepared in its lowest rotational and spin-orbit state by supersonic expansion ... -
LARGE AMPLITUDE MOTIONS IN THE WATER MOLECULE
Sage, Martin L. ( 1993 )Large amplitude vibrations in isolated water molecules are discussed using van Vleck perturbation theory. An effective hamiltonian is developed for each nearly degenerate manifold of stretching and bending states. -
Large Amplitude Motions of Molecules and Ions Revealed by Supersonic Jet Spectroscopy
Ito, Mitsuo ( 1994 )Several laser electronic spectroscopies are applied for the study of large amplitude motions of aromatic molecules and ions in supersonic jets. The internal rotation of the $CH_{3}$ group in substituted toluenes in ground, ... -
LARGE INTERSTELLAR MOLECULES: ARE THEY FORMED BY GAS PHASE CHEMISTRY,GRAIN SURFACE CHEMISTRY, OR BOTH?
Snyder, L. E. ( 1999 )Large interstellar molecules with a low degree of saturation can be formed by gas-phase $chemistry^{a}$. However, large molecules with a high degree of saturation cannot be formed easily by gas-phase reactions; consequently, ... -
LARGE PENETRATION DEPTH OFF ATOMS COMBINED WITH ACCUMULATION AND DETECTION IN RARE GAS INTERFACES
Schwentner, N.; Bressler, C. G.; Dickgiesser, M. ( 1997 )The penetration of photomobilized F atoms is studied by a sandwich experiment using a stack of three rare gas layers. In the top layer photomobile F atoms are prepared, the spacer layer of variable thickness serves as a ...