Browsing Abstracts of OSU International Symposium on Molecular Spectroscopy 1990-1999 by Title
Now showing results 3667-3686 of 3912
-
U.V. SPECTRA OF InO AND $InO^{+}$
Balfour, W. J.; Saksena, M. D. ( 1990 )The emission spectrum of InO has been recorded using different excitation sources: a microwave discharge through a flowing mixture of $InCl_{3}$, $O_{2}$ and argon; a hollow cathode; and an indium metal d.c. arc in air. ... -
THE ULTRA VIOLET SPECTRUM OF $TeO_{2}$
Hullah, Daniel F.; Brown, J. M. ( 1998 )The laser induced fluorescence spectrum of $TeO_{2}$ has been recorded between 345 nm and 405, using a high temperature nozzle source. The spectrum shows a considerable improvement in signal-to-noise ratio in comparison ... -
THE ULTRA VIOLET SPECTUM OF THE NCN RADICAL
Beaton, S. A.; Brown, J. M.; Ito, Y. ( 1996 )The (0,0) band of the $\tilde{A}^{3}\Pi_{u}-\tilde{X}^{3}\Sigma^{+}_{g}$ transition of NCN, observed previously by Herzberg and Travis $^{a}$, has been reinvestigated by means of laser-induced fluorescence at 329 nm. A ... -
ULTRACOLD MOLECULE FORMATION
Bahns, J. T.; Stwalley, W. C.; Wang, H. ( 1998 )Several novel optical and other physical techniques have recently been devised for the control and manipulation of simple diatomic molecules. This talk will review strategies and techniques specifically devised for preparing ... -
ULTRACOLD PHOTOASSOCIATIVE SPECTROSCOPY OF HETERONUCLEAR ALKALI-METAL DIATOMIC MOLECULES
Wang, H.; Stwalley, W. C. ( 1998 )The powerful photoassociative spectroscopy of ultracold atoms used in homonuclear cold collisions can also be applied to the mixed heteronuclear systems. We have examined and identified the excited long-range Hund's case ... -
ULTRAFAST SPONTANEOUS AND STIMULATED EMISSION SPECTROSCOPY OF COUMARIN 153: EVIDENCE FOR THE EXISTENCE OF MULTIPLE EXCITED ELECTRONIC STATE
Blanchard, G. J.; Jiang, Y.; McCarthy, P. K. ( 1994 )The spontaneous and stimulated emission responses of coumarin 153 in three polar solvents exhibit a substantial excitation energy dependence. The transient spontaneous emission data indicate the presence of multiple closely ... -
ULTRAFAST WAVE PACKET DYNAMICS IN JAHN-TELLER SURFACES; Ag ATOMS TN Xe CRYSTALS
Schwentner, N.; Bammel, K.; Dietrich, P.; Kometer, R. ( 1997 )The dynamics on Jahn-Teller surfaces involving pseudorotation, radial oscillations and the symmetric breathing mode has been already explored in isolated triatomics like $Na_{3}$. This contribution deals with the additional ... -
ULTRASENSITIVE DUAL-BEAM ABSORPTION SPECTROSCOPY, BASED ON WAVELENGTH-MODULATION TECHNIQUE AND LOGARITHMIC NOISE CANCELLING
Kuritsyn, Yu.; Liguer, V. ( 1996 )Various registration methods for ultrasensitive diode laser based absorption spectroscopy are discussed. The sensitivity of a single-beam wavelength modulation technique is limited by excess laser noise and wavelength-dependent ... -
ULTRASHORT DISSOCIATION AND RECOMBINATION DYNAMICS OF $I_{2}$ IN MATRIX Ar, A LINEAR CHAIN MODEL
Liu, Li; Guo, Hua ( 1995 )The photo-induced dissociation and recombination dynamics of $I_{2}(A/A^{\prime})$ embedded in low temperature matrix Ar are investigated theoretically in a linear chain model. This work is designed to simulate the recent ... -
ULTRAVIOLET EMISSION OF INTRINSIC MOLECULAR IONS IN SOLID AR.
Savchenko, E. V.; Gubin, S. A.; Grigorashchenko, O. N.; Ogurtsov, A. N. ( 1995 )Excitation of Rare Gas Solids (RGS) results in emission of molecular continua in vacuumultraviolet (VUV) and ultraviolet (UV) spectral regions. The well-known VUV band centered at 9.7 eV is attributed to the radiative decay ... -
ULTRAVIOLET PHOTOLYSIS OF CONDENSED-PHASE ACETYL CHLORIDE: VERIFICATION OF A CONCERTED ELIMINATION REACTION
Rowland, Brad; Hess, Wayne ( 1997 )Ultraviolet photolysis of condensed-phase acetyl chloride $(CH_{3}COCl)$ produces ketene $(H_{2}C=C=O)$ and HCl in a 1:1 dimer complex. The reaction mechanism sharply differs from the photodissociation of gas-phase molecules ... -
ULTRAVIOLET SPECTRA OF MATRIX-ISOLATED CYTOSINE AND SOME OF ITS DERIVATIVES, AND THE EFFECT OF FURTHER ULTRAVIOLET IRRADIATION
Szczesniak, M.; Person, Willis B. ( 1990 )We report here the UV spectra measured for cytocine isolated in an Argon matrix, together with similar studies for 1-methylcytosine and several cytosines halogenated at the 5- position. It is shown that the UV spectrum of ... -
ULTRAVIOLET/VISIBLE SPECTROSCOPY OF THE EARTH'S ATMOSPHERE USING SPACEBORNE INSTRUMENTS: THE GOME AND SCIAMACHY INSTRUMENTS
Chance, K.; Burrows, J. P.; Spurr, R. J. D.; Diebel, D.; Rozanov, V. V. ( 1993 )The Global Ozone Monitoring Experiment (GOME) and the SCanning Imaging Absorption spectroMeter for Atmospheric CHartograph Y (SCIAMACHY) are moderate resolution diode array-based spectrometers that will make atmospheric ... -
UNCERTAINTIES IN THE FITTING OF SPECTRA
Benner, D. Chris ( 1997 )Fitting spectra produces uncertainties in derived parameters which are known to be deceptive at times. Sometimes results must be quoted to much higher precision than the formal uncertainties or the original spectra cannot ... -
UNCERTAINTY, PRECISION AND ROUNDING IN THE PRESENTATION OF FITTED (DIATOMIC SPECTRA) PARAMETERS
LeRoy, Robert J. ( 1997 )In multiparameter fits of models to experimental data sets, the spectroscopic literature has seen very inconsistent treatments of the rounding of fitted parameters. In attempting to minimize the clutter of unnecessary ... -
UNDERSTANDING BARRIERS TO INTERNAL ROTATION IN SUBSTITUTED TOLUENES
Lu, K.- T.; Weinhold, Frank; Weisshaar, J. C. ( 1995 )In recent years microwave, resonant two-photon ionization, and threshold photoionization spectroscopies as well as ab initio calculations have determined the dependence of the barrier to internal methyl rotation on electronic ... -
UNDERSTANDING THE METHANOL $5\nu_{OH} - 4\nu_{OH}/1\nu_{CH}$ IVR FRAGMENTATION ASYMMETRY
Pearman, Ryan; Gruebele, M. ( 1998 )The I:I resonance between the $5\nu_{OH}$ overtone and the $4\nu_{OH}/1\nu_{CH}$ combination band studied by Rizzo and coworkers exhibits wildly different IVR fragmentation patterns for the two resonant states. Efforts to ... -
UNEXPECTED SENSITIVITY OF SEP: OBSERVATION OF FORBIDDEN TRANSITIONS IN ACETYLENE
Jonas, D. M.; Solina, Stephani Ann B.; Rajaram, B.; Silbey, R. J.; Field, R. W.; Yamanouchi, K.; Tsuchiya, S. ( 1992 )Nominally forbidden rotational transitions ($|\Delta K| \equiv |K^{\prime}-\ell ""|\leq 3$) have been observed in the stimulated Emission Pumping (SEP) spectra of acetylene in the $7000 cm^{-1}$ region of the $\bar{X}$ ... -
UNIQUE EVALUATION OF MOLECULAR CONSTANTS
Thirugnanasambandam, P. ( 1990 )Wilson's FG Matrix $Method^{1}$ appears to undergo a natural evolution into a comprehensive Integral Group Theoretical Method capable of providing unique force constants in molecules as a consequence of the recognition ... -
AN UNSTABLE CONFOCAL RESONATOR APPLIED TO C.W. CAVITY RING-DOWN
Dudek, John; Rabinowitz, Paul; Lehmann, K. K. ( 1998 )We have begun to investigate cavity ring-down in the unstable region of a confocal resonator comprised of super polished high reflectivity mirrors of nearly equal radii of curvature. The unstable region is smoothly accessed ...