Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/9586
Title: Distorted-wave calculation of cross sections for inner-shell ionization by electron and positron impact
Author: Segui, Silvia
Dingfelder, Michael
Salvat Gavaldà, Francesc
Keywords: Dispersió (Física nuclear)
Electrons
Scattering (Physics)
Electrons
Issue Date: 2003
Publisher: The American Physical Society
Abstract: 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.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.67.062710
It is part of: Physical Review A, 2003, vol. 67, núm. 6, p. 062710.
URI: http://hdl.handle.net/2445/9586
ISSN: 1050-2947
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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