Results 281 to 290 of about 1,314,344 (348)

Electron-impact cross sections of atomic oxygen

Journal of Physics B: Atomic, Molecular and Optical Physics, 2003
We report electron-impact-induced emission cross sections for the 2p4 3P–3s 3So (130.4 nm), 2p4 3P–3d 3Do (102.7 nm), 2p4 3P–3s' 3Do (98.9 nm) and 2p4 3P–3s'' 3Po (87.8 nm) transitions of atomic oxygen. Measurements were made using a magnetically confined electron beam in collision with atomic oxygen produced by an extended microwave discharge source ...
P V Johnson, I Kanik, D E Shemansky, X Liu   +3 more
openaire   +1 more source

Photoionization cross-section calculations for atomic lithium

Journal of Electron Spectroscopy and Related Phenomena, 1990
Calculations based upon relaxed Hartree-Fock functions for the 1s diagram and satellite photoionization cross sections for atomic lithium are presented and compared with current experimental results. Configuration interaction in the initial and final ionic-core states is included in the calculation.
G.B. Armen, B.I. Craig, P.P. Larkins, J.A. Richards   +3 more
openaire   +1 more source

Calculation of Atom–Atom Excitation Cross Sections by Classical Methods

The Journal of Chemical Physics, 1969
Atom-atom collisional excitation cross sections obtained from ionization cross sections, noting Thomson classical ...
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Measurement of atomic differential scattering cross-sections

British Journal of Applied Physics, 1960
The derivation of the atomic differential scattering cross-section (dσT/dω)θ from the intensity distribution in the background of electron diffraction patterns is discussed, bearing in mind the possible effects of plural scattering. It is shown that the variation of (dσT/dω)θ with specimen thickness reported by Haine and Agar is not real but appeared ...
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Analytical total photo cross section for atoms

Journal of Physics B: Atomic, Molecular and Optical Physics, 1995
A quantum-classical approximation for the total photo cross section of many-electron atoms is derived in a time-dependent formulation. Exact commutator relations for the time-dependent dipole operator and a classical approximation for the propagator are used. Analytical expressions are derived for one- and two-electron atoms. We compare the results for
openaire   +1 more source

Reaction cross-sections for atom-recombination processes

Journal of the Chemical Society, Faraday Transactions 2, 1981
Laplace transform techniques have been used to derive expressions for the reaction cross-sections of three possible mechanisms for the atom recombination process. The equations obtained are used as the basis of a semi-quantitative discussion on some general features of atom recombination.
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Excitation Cross Section for Helium Atoms. II

Physical Review, 1953
The excitation scattering of electrons from helium atoms is investigated for the case of transition to the first excited singlet metastable level in order to examine quantitatively the error introduced by the fact that the description of the helium target is only approximately known.
openaire   +1 more source

Importance of photo atomic cross section for studying physical properties of different types of soil

, 2016
M. Medhat, L. Pires
semanticscholar   +1 more source

Deuterium atomic cross section uncertainties and molecular recycling effects in the divertor region of tokamaks

, 1997
E. W. Thomas, W. Stacey
semanticscholar   +1 more source

A parametrisation of the atomic cross-section for pair production

, 1982
D F Jackson, S Murugesu
semanticscholar   +1 more source