Atomic inner-shell ionization

Journal Article · Mon Jul 01 04:00:00 EDT 1985 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.32.176· OSTI ID:5545128

Das, J N; Chakraborty, S

Cross sections for the K-shell ionization of medium-heavy atoms by relativistic electrons have been calculated in a relativistic framework in the Coulomb gauge to order ..cap alpha../sub 0/ ( = e/sup 2//hc) in the interaction Hamiltonian. Here exchange is neglected. The incident- and scattered-electron wave functions are described by Dirac plane waves. Only the bound- and ejected-electron wave functions are described nonrelativistically for a screened Coulomb potential, used earlier by the present authors. Thus the screening effect is taken into account in this calculation in a satisfactory manner. The calculation is a repetition of what has been published recently by the present authors with one important exception: Here, the ejected-electron continuum state wave function that is used is determined variationally for the above screened Coulomb potential. Thereby some perturbation approximation of ad hoc nature could be avoided. As a consequence, considerable improvement is noticed in the total cross-section results. Comparison with experimental results for /sup 29/Cu, /sup 47/Ag, and /sup 79/Au shows a good agreement. The calculation may easily be extended to ionization from other shells.

• Research Organization: Department of Applied Mathematics, University College of Science, 92 Acharya Prafulla Chandra Road, Calcutta 700 009, West Bengal, India
• OSTI ID: 5545128
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 32:1; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
COLLISIONS
COPPER
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
GOLD
INNER-SHELL IONIZATION
IONIZATION
K SHELL
METALS
RELATIVISTIC RANGE
SILVER
TRANSITION ELEMENTS