Journal ArticleDOI
Electron impact excitation of H and He+. I. 1s to ns transitions
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In this paper, a polarized orbital distorted wave model is used to calculate total and differential cross sections for 1s to ns(n=2,3,4,5) electron impact induced transitions in H and He+ from threshold to 20 Ryd.Abstract:
A polarized orbital distorted wave model is used to calculate total and differential cross sections for 1s to ns(n=2,3,4,5) electron impact induced transitions in H and He+ from threshold to 20 Ryd. The total cross sections for the 1s to 2s transitions are in good agreement with experiment, but cannot in this model show resonances. The differential cross sections at energies above 100 eV agree closely with those of Geltman and Hidalgo (1971). The model reduces to the Born-Oppenheimer (z=0) or CBO I(z=0) when the polarization and static potentials are omitted.read more
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Journal ArticleDOI
Collisions between electrons and ions
K T Dolder,B Peart +1 more
TL;DR: In this article, the authors discuss electron-ion collisions from an experimental viewpoint, with an emphasis on recent experiments and new techniques, such as ion traps and sequential mass spectrometry.
Book ChapterDOI
Electron Impact Excitation of Positive Ions
TL;DR: In this article, the excitation of positive ions by electron impact is discussed and the effect of collisions at higher densities is to bring the populations closer to thermodynamic values and hence to increase the recombination rate.
ELECTRON SCATTERING BY ATOMIC HYDROGEN USING A PSEUDO-STATE EXPANSION. III. EXCITATION OF 2s AND 2p STATES AT INTERMEDIATE ENERGIES.
P.C. Burke,T.G. Webb +1 more
TL;DR: In this paper, the 1s-2s and 1s 2p excitation cross sections in e--H scattering are reported which agree qualitatively with experiment over an energy range from close to the ionization threshold to 54.4 eV.
Journal ArticleDOI
Position and widths of autoionising states in the helium isoelectronic sequence above the N=2 continuum
TL;DR: In this paper, the energy and widths of autoionizing states in the helium isoelectronic sequence converging to the n=3 and n=4 hydrogenic thresholds are computed.
Journal Article
e–H resonances in the 2p excitation channel
References
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Journal ArticleDOI
Impact Excitation and Polarization of the Emitted Light
Ugo Fano,Joseph Macek +1 more
TL;DR: In this paper, a new formulation for the angular distribution and the polarization of light excited by atomic and electronic collisions and modulated in time by the action of internal and external fields is presented.
Journal ArticleDOI
The polarization of atomic line radiation excited by electron impact
TL;DR: In this article, a theory of the probability of a polarized photon being emitted by the complete system of atom + electron was developed, which is based on the calculation of the cross-sections QM for excitation of states of definite component of angular momentum along the direction of the electron beam.
Journal ArticleDOI
Electron impact excitation of atoms
TL;DR: The experimental and theoretical literature about the electron impact excitation of atoms is reviewed in this paper, where the reliability of the various methods is discussed and a general critique of the optical method of measuring excitation functions is given, with the objective of promoting higher quality future experimental work.
Journal ArticleDOI
Electron Impact Excitation of Positive Ions
TL;DR: In this article, the Coulomb-Born-Oppenheimer reactance matrices and cross-sections for all transitions between the Is, 2s and 2p states in He+ and in hydrogen-like ions of large nuclear charge are given.
Journal ArticleDOI
Application of the Method of Polarized Orbitals to the Scattering of Electrons from Hydrogen
Aaron Temkin,J. C. Lamkin +1 more
TL;DR: In this paper, the authors used a transformation of Omidvar to calculate the scattering of slow electrons from atomic hydrogen, using polarized orbitals to avoid the iterative procedure of solving the associated integro-differential equations.
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