Results 251 to 260 of about 38,860 (304)

Modeling of atomization rate during gas atomization

Acta Materialia, 1998
Abstract A mathematical model provides the tools to compute the atomization rate from the backpressure, and the height of the descending liquid head and the amount of the over-pressure required as the functions of the atomization time. The computed data agree reasonably well with the experimental data.
Y.M. Chen, Y.H. Su†, R.W. Lin†, C.-Y.A. Tsao   +3 more
openaire   +1 more source

Semiempirical Model for Atom–Atom Ionization Rates

The Journal of Chemical Physics, 1969
Numerical calculations are carried out to help interpret ionization rates for rare-gas atoms (particularly argon) obtained in shock-heating experiments. A simplified semiempirical model with three adjustable parameters is used for electronic transitions induced by atom–atom collisions.
D. J. Hollenbach, E. E. Salpeter
openaire   +1 more source

Characterizing fluorine and chlorine atom flow rates using iodine atom spectrometry

AIAA Journal, 2001
The production of F and Cl atoms in an electrical discharge of F 2 or Cl 2 has been examined in a flow reactor. A tunable diode laser was used to probe the concentration and translational temperature of I atoms produced by F and Cl atom reactions with HI.
Gerald C. Manke, Thomas L. Henshaw, Timothy J. Madden, John M. Herbelin, Brent D. Rafferty, Gordon D. Hager   +5 more
openaire   +1 more source

Normalization of the single atom counting rate in an atom trap

Optics Letters, 2012
The single atom counting rate of a rare isotope and the loading rate of another stable isotope with an abundance over 10 orders of magnitude larger are measured in one atom trap. The linear correlation between the measured counting/loading rates is examined to determine the (84)Kr/(82)Kr and (85)Kr/(83)Kr ratios of a Kr gas sample.
C F, Cheng, G M, Yang, W, Jiang, Y R, Sun, L Y, Tu, S M, Hu   +5 more
openaire   +2 more sources

Force Dependence of Transition Rates in Atomic Friction

Physical Review Letters, 2006
The lateral forces during stick-slip motion of an atomic force microscope cantilever on highly oriented pyrolytic graphite are measured and analyzed. We identify the regimes where thermally activated interstitial hopping of the cantilever tip proceeds according to a single-step reaction scheme and extract the corresponding force-dependent transition ...
Evstigneev, Mykhaylo, Schirmeisen, Andre, Jansen, Lars, Fuchs, Harald, Reimann, Peter   +4 more
openaire   +3 more sources

Atomic radiation rates in photonic crystals

Physical Review B, 2001
A photonic crystal, defined as a periodic dielectric structure, can influence the radiation rate of an embedded dipolar emitter. A theory of this effect is developed and the efficiency of a dipolar photonic source is calculated for a realistic three-dimensional crystal.
Lousse, Virginie, Vigneron, Jean-Pol, Bouju, Xavier, Vigoureux, Jean-Marie   +3 more
openaire   +2 more sources

Should atoms be X-rated?

Journal of Chemical Education, 1986
Two cheers for atoms. Three cheers for the elements. Atoms are optional. Elements are essential. Elements without atoms, formulas, and equations are o.k.
openaire   +1 more source

Relativistic semiclassical atomic transition rates

Journal of Quantitative Spectroscopy and Radiative Transfer, 1994
Abstract This paper gives a new semiclassical (WKB) solution of the one-electron Dirac equation for electrons in a spherically symmetric atomic potential. The two-component wave-function has several favorable formal properties: it exactly satisfies a relativistic probability conservation equation and exactly reduces to the nonrelativistic ...
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Temperature Dependence of Atomic Decay Rate

Chinese Physics Letters, 2012
We investigate the decay rate of an atom in a two-dimensional optical microcavity in which there exists a Bose-Einstein condensation of photons. It is found that below the critical temperature Tc, the atomic decay rate depends on the absolute temperature T. Especially, at absolute zero temperature almost all photons are in the condensate state, and the
Jian-Jun Zhang, Ze Cheng
openaire   +1 more source