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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Ion-molecule collision charge transfer and momentum transfer relaxation rates, using ion cyclotron resonance heterodyning method
Kinetic energy dependent charge transfer rates for ion-molecule reactions in ammonia, using cyclotron ejection and impulse methods
Gas phase ion-molecule phosphine reactions in pure and binary mixtures by ion cyclotron resonance spectroscopy, considering acidity and basicity
Inelastic collision effects on vibrational excitation of diatomic molecules with conserved energy
Halogen molecules electron affinities by measuring negative ion average translational energy and appearance potentials, noting free radicals heat of formation
Intense superradiant emission in HF and DF molecules high gain IR transitions, examining spectral distributions with pneumatically tuned Fabry-Perot interferometer
Spherical shell potential extension to shells of differing diameters for intermolecular forces in globular molecules, considering binary gaseous mixtures
Self consistent field /SCF/ calculations of dipyridine glyoxal and bianthrone photoproduct molecules with triplet ground state, using unrestricted Hartree-Fock theory
Ground state dissociation energies and long range internuclear potentials of diatomic molecules of halogens from spectroscopic vibrational spacings
Ab initio calculations on trajectories and nonadiabatic transitions in reactions of hydrogen atomic ions with hydrogen molecules
Shock tunnel drag measurements on sharp slender cones in near free molecule hypersonic flow in air and He
Integrated absorption coefficient of pressure induced pure rotational and vibrational transitions in binary collisions of homonuclear diatomic molecules at high temperatures
Ion-quadrupole effects in ion-molecule collisions by numerical calculations of capture cross sections and computer-plotter studies of ion trajectories
Steady slow free molecule flow past sphere, obtaining distribution function and surface boundary conditions
Atmospheric trace and pollutant molecules global survey, using airborne/spaceborne high resolution Fourier interference IR spectrometer
Experimental techniques for differential, total and momentum transfer electron-molecule scattering cross sections at low electron energies, discussing rotational excitation
Collisions between deuterium atoms and hydrogen molecules were studied in a modulated crossed beam experiment. The relative signal intensity and the signal phase for the product HD from reactive collisions permitted determination of both the angular distribution and HD mean velocity as a function of angle. From these a relative differential reactive scattering cross section in center-of-mass coordinates was deduced. The experiment indicates that reactively formed HD which has little or no internal excitation departs from the collision anisotropically, with maximum amplitude 180 deg from the direction of the incident D beam in center-of-mass coordinates, which shows that the D-H-H reacting configuration is short-lived compared to its rotation time. Non reactive scattering of D by H2 was used to assign absolute values to the differential reactive scattering cross sections.
Vibrational spectra were studied from 400 to 33/cm for molecules which may be present in the atmosphere of Jovian planets. The microwave spectrum of cis glyoxal was studied. Sources of color variation in the Jovian atmosphere were analyzed in relation to molecular crystals. The low frequency modes of acetaldehyde and acetaldehyde-d sub 4 are discussed.