Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Thomas A. Spiglanin"'
Autor:
Sherrie L. Zacharius, Myriam P. Easton, D. G. Sutton, Thomas A. Spiglanin, Eric W. Fournier, Sunne Genova
Publikováno v:
Polymer. 34:1404-1409
Chemical and physical tests were conducted to determine the effects of long-term exposure to nitrogen tetroxide on Kalrez 1045, a perfluorinated copolymer. The weight and Shore A hardness of samples from two different lots were determined after expos
Publikováno v:
The Journal of Chemical Physics. 83:2186-2190
We report the two‐photon excitation spectrum and decay kinetics of the two‐photon prepared states for diphenylbutadiene in a helium free jet. The spectrum is that of a symmetry allowed two‐photon transition and is assigned using 17 harmonic fun
Autor:
Thomas A. Spiglanin, David Chandler
Publikováno v:
The Journal of Chemical Physics. 87:1577-1581
We have examined the photofragmentation HNCO→NH(a 1Δ)+CO using radiation at wavelengths shorter than 230 nm. Nascent NH(a 1Δ) shows relatively little rotational excitation, accounting for less than 12% of the energy in excess of the dissociation
Autor:
Thomas A. Spiglanin, Bryan E. Kohler
Publikováno v:
The Journal of Chemical Physics. 80:5465-5471
The fluorescence spectrum, one photon fluorescence excitation spectrum, and single vibrational level decay kinetics have been measured for 1,6‐diphenyl‐1,3,5‐hexatriene seeded in helium in a supersonic free jet. The 2 1Ag doubly excited state (
Publikováno v:
The Journal of Physical Chemistry. 90:6184-6189
The heat of formation (..delta..H/sub f/(298 K)) of HNCO is determined to be -24.9/sub -2.8//sup +0.7/ kcal/mol (based on ..delta..H/sub f/(NH) = 85.2 kcal/mol). This value is obtained by measuring the threshold for the production of NH(a/sup 1/..del
Publikováno v:
The Journal of Chemical Physics. 87:1568-1576
The internal state distributions of CO produced by photodissociation of HNCO at 1930 (230.1 nm) and at 10 200 cm−1 (193.3 nm) in excess of the dissociation energy are determined from multiphoton ionization spectra of the CO fragment measured under
Autor:
Thomas A. Spiglanin, Bryan E. Kohler
Publikováno v:
Review of Scientific Instruments. 57:874-877
A two‐photon excitation spectrometer which can be used with dilute molecular gases is described. The spectrometer is based on a standing wave tunable dye laser synchronously pumped by a mode‐locked Ar+ laser. Two‐photon excitation is enhanced i
Publikováno v:
Chemical Physics Letters. 137:414-420
We report 2 + 1 resonantly enhanced multiphoton ionization spectra of HCl between 82000 and 89000 cm −1 two-photon energy with mass resolution of the ions. We see significant production of atomic products subsequently ionized when the two-photonres
Autor:
Thomas A. Spiglanin, David Chandler
Publikováno v:
Chemical Physics Letters. 141:428-432
The kinetic energy released in the photodissociation of HNCO is measured by photofragment translational spectroscopy. In this study, CO is ionized by laser ionization immediately following its ejection from HNCO. The time for the CO ions to travel th
Publikováno v:
Proceedings of the National Academy of Sciences. 80:4580-4584
Highly resolved emission and one-photon fluorescence excitation spectra for 1,4-diphenyl-1,3-butadiene seeded in a supersonic expansion of helium have been measured. The spectra show a long-lived (52.8 nsec for excitation at the 0-0) state at 29,652.