Multiple ionization and x-ray emission accompanying the cascade decay of inner-shell vacancies in Fe

Journal Article · Sun Jun 01 04:00:00 EDT 1980 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.21.1917· OSTI ID:5319057

Jacobs, V L; Davis, J; Rozsnyai, B F; Cooper, J W

A model has been developed which predicts the relative abundances of the differently charged ions and the x-ray emission spectra resulting from the cascade decay of an arbitrary distribution of inner-shell vacancies created in atoms by energetic charged particles or x rays. The multiple-ionization and x-ray production cross sections are defined in terms of the populations of the single- and multiple-vacancy states occurring in the atomic reorganization process. All allowed radiative, Auger, and Coster-Kronig transitions are taken into account in the determination of these populations. The x-ray spectra are classified in terms of characteristic lines which are due to the radiative decay of single vacancies and satellites which are associated with transitions from multiple-vacancy states. Results of calculations are presented for the creation of the initial vacancy distribution by single inner-shell electron ionization of neutral Fe with electrons and photons. Multiple ionization is found to represent only 10% of the total for electron-impact ionization but is predicted to be predominant during K- and L-shell photoionization, in agreement with experimental results obtained for the rare gases. The intensity of the L..cap alpha.. satellites is always less than the L..cap alpha.. characteristic line intensity for electron-impact ionization but can substantially exceed the characteristic line intensity during K-shell photoionization, in agreement with previous results obtained for medium-Z elements.

• Research Organization: Plasma Radiation Group, Code 6707, Plasma Physics Division, Naval Research Laboratory, Washington D.C. 20375
• OSTI ID: 5319057
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 21:6; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640305* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Theory-- (-1987)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
AUGER EFFECT
CHARGED PARTICLES
COLLISIONS
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION SPECTRA
HOT PLASMA
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
IRON
K SHELL
L SHELL
METALS
MULTICHARGED IONS
PHOTOIONIZATION
PLASMA
SPECTRA
TRANSITION ELEMENTS
X-RAY SPECTRA