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

Journal Article · Sun Nov 15 04:00:00 EST 2009 · Atomic Data and Nuclear Data Tables

DOI:https://doi.org/10.1016/j.adt.2009.08.001· OSTI ID:21333875

Bote, David ^[1]; Salvat, Francesc ^[1]; Jablonski, Aleksander ^[2]; Powell, Cedric J ^[3]

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1. Facultat de Fisica (ECM and ICC), Universitat de Barcelona, Diagonal 647, 08028 Barcelona (Spain)
2. Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw (Poland)
3. Surface and Microanalysis Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8370 (United States)

Analytical formulas are presented for the easy calculation of cross sections for ionization of K, L and M shells of neutral atoms by impact of electrons and positrons with kinetic energies up to 1 GeV. Each formula contains a number of parameters that are characteristic of the element, the active electron shell and the projectile particle. The values of these parameters were determined by fitting the cross section values in an extensive database that was calculated recently by means of a composite algorithm that combines the distorted-wave and plane-wave Born approximations. Tables of parameter values are given for all elements, from hydrogen (Z=1) to einsteinium (Z=99). The proposed analytical expressions yield ionization cross sections that agree with those in the numerical database to within about 1%, except for projectiles with near-threshold energies.

• OSTI ID: 21333875
• Journal Information: Atomic Data and Nuclear Data Tables, Journal Name: Atomic Data and Nuclear Data Tables Journal Issue: 6 Vol. 95; ISSN ADNDAT; ISSN 0092-640X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALGORITHMS
BORN APPROXIMATION
CROSS SECTIONS
DISTORTED WAVE THEORY
EINSTEINIUM
ELECTRONS
GEV RANGE 01-10
HYDROGEN
IONIZATION
KINETIC ENERGY
M SHELL
POSITRONS
THRESHOLD ENERGY