[ital K]-shell ionization of atoms by electron and positron impact

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.1209· OSTI ID:6074092

Khare, S P ^[1]; Saksena, V ^[2]; Wadehra, J M ^[3]

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1. Department of Physics and Astronomy, Wayne State University, Detroit, Michigan, 48202 (United States) Department of Physics, Meerut University, Meerut 250004 (India)
2. Department of Physics, Meerut University, Meerut 250004 (India)
3. Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48202 (United States)

In the plane-wave Born approximation (PWBA), scaling relations for [ital K]-shell generalized oscillator strengths and energy-loss cross sections of atoms are given. The total [ital K]-shell ionization cross sections, obtained at high impact energy, are used to obtain the Bethe collisional parameter [ital c][sub [ital K]] for atoms ranging from carbon to gold. These values of [ital c][sub [ital K]] are, in general, significantly different from those obtained previously with the help of Fano plots at relatively low impact energies. Furthermore, using Hippler's modification of the PWBA [Phys. Lett. A 144, 81 (1990)], total [ital K]-shell ionization cross sections of various atoms by electron and positron impact are calculated over a wide energy range. The electron-impact ionization cross sections for light atoms are in satisfactory agreement with the experimental data.

• OSTI ID: 6074092
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:2; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BORN APPROXIMATION
COLLISIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELECTRONIC STRUCTURE
ENERGY LOSSES
IONIZATION
K SHELL
LOSSES
OSCILLATOR STRENGTHS
POSITRON COLLISIONS
POSITRON-ATOM COLLISIONS
SCALING LAWS