Browsing Abstracts of OSU International Symposium on Molecular Spectroscopy 1990-1999 by Title

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 ...

LARGE-AMPLITUDE BENDING DYNAMICS OF ACETYLENE

Jacobson, Matthew P.; O'Brien, Jonathan P.; Silbey, R. J.; Field, R. W. ( 1998 )

We have investigated and the large-amplitude bending dynamics of acetylene, in its ground electronic state, using an effective Hamiltonian model that reproduces all relevant experimental data (84 vibrational levels), up ...

LASER ABSORPTION AND EMISSION SPECTROSCOPY OF THE YELLOW GREEN BAND SYSTEM OF $TiCl^{+}$

Kaledin, L. A.; Heaven, M. C. ( 1997 )

The Yellow-Green band system of $TiCl^{+}$ has been studied using a dual-beam laser absorption technique in a hollow cathode $discharge^{m}$, and conventional emission spectroscopy. The quartz discharge cell for emission ...

Laser Absorption Spectroscopy of $LaF^{+}$: Accurate Term Energies for the $H^{2}\Pi$, $D^{2}\Phi$, and $X^{2}\Delta$ States

Kalden, L. A.; Kaledin, A. L.; Heaven, M. C. ( 1996 )

The laser absorption spectrum of the $LaF^{+}$ molecular ion has been observed for the first time. Gas phase LaF was obtained by heating a mixture of a 0.2 g of La metal and 0.3 g of $LaF_{3}$ powder to 1900 K. $LaF^{+}$ ...