Results 271 to 280 of about 9,838,903 (305)

Electron impact excitation of methane

The Journal of Chemical Physics, 1983
Electron energy-loss spectra covering the elastic and inelastic region up to 15.0 eV were obtained at 20, 30, and 200 eV impact energies at scattering angles ranging from 8° to 130°. Relative differential elastic scattering cross sections were determined at each impact energy and then, normalized to the absolute scale by utilizing the 100° differential
L. Vuškovic̀, S. Trajmar
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Excitation of Nv by electron impact

Journal of Physics B: Atomic and Molecular Physics, 1974
Collision strengths for electron impact excitation of Nv at an incident energy of 6.0 Ryd are calculated in a number of close-coupling approximations. Coupling effects are found to be more important than exchange effects for the 2s-3p transition which result in a close-coupling collision strength 40% larger than that calculated in a distorted wave ...
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Electron-impact excitation and ionization of

Journal of Physics B: Atomic, Molecular and Optical Physics, 1997
We present results from R-matrix with pseudo-states (RMPS) and convergent close-coupling (CCC) calculations for electron-impact excitation from and direct ionization of the ground state of the ion. Comparison of the CCC and RMPS results with those from first-order distorted-wave calculations as well as simpler close-coupling calculations, with only ...
Pascale J Marchalant, Klaus Bartschat, Igor Bray   +2 more
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Electron impact excitation of water

Journal of Physics B: Atomic, Molecular and Optical Physics, 1998
The R-matrix method is used to calculate electron scattering cross sections for the excitation of four low-lying electronically excited states of the water molecule. These states, of symmetry , , and , have vertical excitation energies in the range 7-10 eV and are known to be dissociative.
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Excitation of Atoms by Electron Impact

Journal of the Physical Society of Japan, 1968
Excitation of atoms by electron impact is investigated theoretically with use of the total angular momentum representation. The mathematical method described in the author's previous paper is used. The exchange effect is neglected throughout the paper. A new cross-section formula is derived in the two-state approximation.
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Electron-impact excitation of carbon

Physical Review A, 2005
The $B$-spline $R$-matrix method is used to investigate the electron-impact excitation of neutral carbon over an energy range from threshold to $60\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$. A multiconfiguration Hartree-Fock method with nonorthogonal orbitals is employed to generate an accurate representation of the target wavefunctions. The present close-
Oleg Zatsarinny, Klaus Bartschat, Ludmila Bandurina, Viktor Gedeon   +3 more
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Electron-impact excitation of calcium

Journal of Physics B: Atomic, Molecular and Optical Physics, 2007
A B-spline R-matrix (close-coupling) method is applied to study electron-impact excitation of the lowest four excited states of calcium. Results for angle-integrated and angle-differential cross sections, as well as (pseudo-) Stokes parameters of the light emitted in the (4s4p)1Po → (4s2)1S optical decay, are compared with various experimental data and
Oleg Zatsarinny, Klaus Bartschat, Ludmila Bandurina, Sergey Gedeon   +3 more
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Excitation of Helium by Electron Impact

Physical Review A, 1973
Excitation of helium atoms by electron impact is studied for intermediate- and high-energy electrons. Calculations of the differential cross sections for the 1S - 2 /sup 1/S transition are made by use of a one-dimensional integral representation of the scattering amplitude obtained in the Glauber approximation.
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Electron Impact Excitation of the Dayglow

Journal of the Atmospheric Sciences, 1969
Equilibrium velocity distributions of F region photoelectrons produced by solar ionizing radiation, discussing dayglow as impact ...
A. Dalgarno, M. B. McElroy, A. I. Stewart   +2 more
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Excitation of Atoms by Electron Impact

1979
Publisher Summary This chapter points out some of the major advances that have been made in the past decade. The chapter treats a particular area where technical advance or improved understanding has made possible measurements that in many cases must be regarded as definitive.
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