Distorted-wave calculation of cross sections for inner-shell ionization by electron and positron impact
Journal Article
·
· Physical Review. A
- Facultat de Fisica (ECM), Universitat de Barcelona, Diagonal 647, 08028 Barcelona (Spain)
The relativistic distorted-wave Born approximation is used to calculate differential and total cross sections for inner shell ionization of neutral atoms by electron and positron impact. The target atom is described within the independent-electron approximation using the self-consistent Dirac-Fock-Slater potential. The distorting potential for the projectile is also set equal to the Dirac-Fock-Slater potential. For electrons, this guarantees orthogonality of all the orbitals involved and simplifies the calculation of exchange T-matrix elements. The interaction between the projectile and the target electrons is assumed to reduce to the instantaneous Coulomb interaction. The adopted numerical algorithm allows the calculation of differential and total cross sections for projectiles with kinetic energies ranging from the ionization threshold up to about ten times this value. Algorithm accuracy and stability are demonstrated by comparing differential cross sections calculated by our code with the distorting potential set to zero with equivalent results generated by a more robust code that uses the conventional plane-wave Born approximation. Sample calculation results are presented for ionization of K- and L-shells of various elements and compared with the available experimental data.
- OSTI ID:
- 20639761
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 67; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cross sections for ionization of K, L and M shells of atoms by impact of electrons and positrons with energies up to 1 GeV: Analytical formulas
Inner-shell ionization by heavy charged particles in the binary-collision model. I. Effect of the electron momentum distribution on the energy dependence of the ionization cross section
Doubly differential cross sections for proton-impact ionization of argon
Journal Article
·
Sat Nov 14 23:00:00 EST 2009
· Atomic Data and Nuclear Data Tables
·
OSTI ID:21333875
Inner-shell ionization by heavy charged particles in the binary-collision model. I. Effect of the electron momentum distribution on the energy dependence of the ionization cross section
Journal Article
·
Sat Jul 01 00:00:00 EDT 1978
· Sov. Phys. - Tech. Phys. (Engl. Transl.); (United States)
·
OSTI ID:6430219
Doubly differential cross sections for proton-impact ionization of argon
Journal Article
·
Sat Sep 01 00:00:00 EDT 1979
· Phys. Rev., A; (United States)
·
OSTI ID:5942589