Exploratory studies of liquid behavior in randomly excited tanks - Lateral excitation
Fluid behavior in unbaffled circular cylindrical tank under relatively low frequency random lateral excitation
CYLINDRICAL TANK↗
SEARCH · Search NASA
Results for “EXCITATION”
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Luminescence of solids excited by surface recombination of atoms. iv - mechanisms of excitation and luminescence.
Excitation and luminescence of solids subjected to surface-catalyzed atom recombination and photoexcitation
SURFACE IONIZATION↗
Excitation by electron collision of excited atomic hydrogen.
Parabolic coordinate evaluation of atomic form factor of hydrogen atom for excitation cross section induced by electron collision
HYDROGEN ATOM↗
Computational investigation of internal excitation in nonreactive molecular collisions - Resonances in rotational excitation.
Subexcitation molecular collisions resonances demonstrated by numerical solution of integral equations for rotational excitation, exhibiting adiabatic approximation limitations
Bernstein, R. B.↗
Multistate impact-parameter calculation of atom-atom excitation cross sections - Excitation of atomic hydrogen by neon, argon, and krypton
Hydrogen and inert gas atoms collisional excitation cross sections calculated by multistate impact parameter approximation
Levy, H., II↗
Mean radiative lifetime of vibrationally excited /v equals 9/ hydroxyl - Rate of the reaction of vibrationally excited hydroxyl /v equals 9/ with ozone
Vibrationally excited ground state hydroxyl in fast flow system, considering mean radiative lifetime and reaction rate with ozone
Coltharp, R. N.↗
Theory of nearly symmetric excited-state - Excited-state electron capture in ion-atom inelastic scattering
Symmetric excited state electron capture cross sections in ion-atom inelastic scattering, using two state approximation formulas
Ritchie, B.↗
Calculation of the total electron excitation cross section in the Born approximation using Slater wave functions for the Li (2s yields 2p), Li (2s yields 3p), Na (3s yields 4p), Mg (3p yields 4s), Ca (4s yields 4p) and K (4s yields 4p) excitations
Excitation of neutral atoms by inelastic scattering of incident electrons in gaseous nebulae were investigated using Slater Wave functions to describe the initial and final states of the atom. Total cross sections using the Born Approximation are calculated for: Li(2s yields 2p), Na(3s yields 4p), k(4s yields 4p). The intensity of emitted radiation from gaseous nebulae is also calculated, and Maxwell distribution is employed to average the kinetic energy of electrons.
Simsic, P. L.↗
Multistate impact-parameter calculation of atom-atom excitation cross sections - Excitation of H/1s/ by 1/1/S of He
Time dependent matrix elements for multistate impact-parameter calculations for atom-atom inelastic cross sections
Levy, H., II↗
Differential cross section for the reactive scattering of deuterium atoms by hydrogen molecules - Cross sections for the excitation of Na/3 2P/ by collisions with internally excited molecular hydrogen, deuterium and nitrogen
Explore the source record for details and available documents.
Krause, H. F.↗
Electron scattering by molecules with and without vibrational excitation. IV - Elastic scattering and excitation of the first vibrational level for N2 and CO at 20 eV.
Explore the source record for details and available documents.
Truhlar, D. G.↗
The application of the time-dependent Hartree-Fock method to the calculation of excited state-excited state transition densities of atoms /molecules/
Explore the source record for details and available documents.
Csanak, G.↗
Electron scattering by CO2 - Elastic scattering, rotational excitation, and excitation of the asymmetric stretch at 10 eV impact energy
Explore the source record for details and available documents.
Thirumalai, D.↗
Acoustic propagation in finite length elastic cylinders. I - Axisymmetric excitation. II - Asymmetric excitation
Explore the source record for details and available documents.
El-Raheb, M.↗
Investigation of RF excited CW CO2 waveguide lasers local oscillator - RF excitation
A new local oscillator housing was built which seems to have improved laser life. Laser cooling was changed from internal water cooling to the more convenient thermal contact cooling. At the present time, a conclusion can not be made if the 20 percent reduction in power output is the result of poorer cooling or poorer grating alignment. The coupling-starting network was improved from 55 to about 90 percent. It can be adjusted by varying trimmers C sub 1 and C sub 2 to match RF power levels between 10 and 30 W. If the laser admittance changes greatly with laser life rematching will have to be achieved by remote control for space applications. The same holds true if the RF power level has to be changed with a maximum efficiency constraint.
Hochuli, U.↗
Sources of mesoscale variability of gravity waves. I - Topographic excitation. II - Frontal, convective, and jet stream excitation
The effect of topography as a source of mesoscale variability was investigated using aircraft measurements of winds and temperature collected during the Global Atmospheric Sampling Program, with results showing marked increases in the variance of zonal and meridional wind speeds and of potential temperature over rough terrain. In addition, four cases of mesoscale variance enhancements of horizontal velocity and temperature due to frontal activity, nonfrontal convection, and wind shear were studied. The implications of these episodic enhancements of variances for the vertical transports of energy and momentum are considered in the framework of the gravity wave theory.
Nastrom, Gregory D.↗
Coherence Measurements for Excited to Excited State Transitions in Barium
Experimental studies concerning elastic and inelastic electron scattering by coherently ensembles of Ba (...6s6p (sub 1)P(sub 1)) atoms with various degrees of alignment will be described. An in-plane, linearly-polarized laser beam was utilized to prepare these target ensembles and the electron scattering signal as a function of polarization angle was measured for several laser geometries at fixed impact energies and scattering angles. From these measurements, we derived cross sections and electron-impact coherence parameters associated with the electron scattering process which is time reverse of the actual experimentally studied process. This interpretation of the experiment is based on the theory of Macek and Herte. The experimental results were also interpreted in terms of cross sections and collision parameters associated with the actual experimental processes. Results obtained so far will be presented and plans for further studies will be discussed.
Trajmar, S.↗