Angular and energy differential electron emission cross sections in collisions between antiprotons and helium atoms

Our earlier pseudopotential calculations on electrons colliding with argon and krypton are extended to consider the elastic electron–helium scattering system. In this paper, we present detailed results for phase shifts, differential, total, and momentum-transfer cross sections for this system for incident electron energies in the range from 0 to 20 eV. These agree very well with existing experimental data and with other theoretical calculations.

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Differential cross sections and electron-impact coherence parameters for electron scattering from helium atoms

Journal of Physics B Atomic Molecular and Optical Physics ◽

10.1088/0953-4075/29/13/021 ◽

1996 ◽

Vol 29 (13) ◽

pp. 2875-2885 ◽

Cited By ~ 45

Author(s):

K Bartschat ◽

E T Hudson ◽

M P Scott ◽

P G Burke ◽

V M Burke

Keyword(s):

Electron Impact ◽

Electron Scattering ◽

Cross Sections ◽

Differential Cross ◽

Differential Cross Sections ◽

Helium Atoms

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The elastic scattering of fast electrons and positrons by hydrogen and helium atoms

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1959.0067 ◽

1959 ◽

Vol 250 (1262) ◽

pp. 337-345 ◽

Cited By ~ 19

Keyword(s):

Elastic Scattering ◽

Cross Sections ◽

Differential Cross ◽

Born Approximation ◽

Logarithmic Singularity ◽

Hydrogen Atoms ◽

Fast Electrons ◽

Helium Atoms ◽

Electrons And Positrons ◽

Angle Scattering

A simplification of the second Born approximation due to Massey & Mohr is used to calculate the differential cross-sections for the elastic scattering of fast electrons and fast positrons by hydrogen atoms and helium atoms, the method of Dalitz being applied to evaluate all the relevant integrals. Although the logarithmic singularity which is found in the differential cross-section for zero-angle scattering is shown to be absent in the true second Born approximation the use of the simplification of this approximation is justified at sufficiently high impact energies provided the angle of scattering is not too small. The results of the calculations for incident electrons in helium are compared with the available experimental data.

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Electron impact excitation of He 21P in the presence of a nonresonant laser field

Canadian Journal of Physics ◽

10.1139/p93-052 ◽

1993 ◽

Vol 71 (7-8) ◽

pp. 326-333 ◽

Cited By ~ 4

Author(s):

B. Wallbank ◽

J. K. Holmes ◽

A. Weingartshofer

Keyword(s):

Carbon Dioxide ◽

Cross Sections ◽

Differential Cross ◽

Laser Field ◽

Carbon Dioxide Laser ◽

Impact Excitation ◽

Incident Electron Energy ◽

Electron Impact Excitation ◽

Helium Atoms ◽

Simultaneous Absorption

We report experimental differential cross sections for inelastic scattering of electrons from helium atoms in the presence of an intense (~108 W cm−2) carbon dioxide laser. The cross sections for excitation of the 21P state of helium with the simultaneous absorption or emission of one laser quantum were measured over the incident electron energy range of 36–70 eV and scattering angles of 13–31°.

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Untersuchungen zur Wirkung von monochromatischer Vakuum-UV-Strahlung auf DNS

Zeitschrift für Naturforschung B ◽

10.1515/znb-1969-0610 ◽

1969 ◽

Vol 24 (6) ◽

pp. 722-728 ◽

Cited By ~ 9

Author(s):

K. U. Berger

Keyword(s):

Cross Section ◽

Cross Sections ◽

Electron Emission ◽

Vacuum Ultraviolet ◽

Monochromatic Light ◽

Ionization Probability ◽

Thin Layers ◽

Inactivation Mechanism ◽

Grating Monochromator ◽

Vacuum Uv

Inactivation cross sections of infectious ΦΧ-174-DNA in the extreme vacuum-ultraviolet were determined by irradiation of thin layers with monochromatic light down to 584 Å by means of a powerful grating-monochromator, the elements of which are described. Comparison of inactivation and light-induced electron emission shows that light of quantum energies below 7 eV inactivates by excitation only, whereas above 10.2 eV ionization is the predominant inactivation mechanism. Because of the satisfactory agreement of the curves for inactivation and electron emission, it is conducted that the remarkable increase of the inactivation cross section in the region of the short wavelength vacuum-uv is due to increasing ionization probability.

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