X-ray emission from thin plasmas. I - Multiple Auger ionisation and fluorescence processes for Be to Zn

Details X-ray emission from thin plasmas. I - Multiple Auger ionisation and fluorescence processes for Be to Zn X-ray emission from thin plasmas. I - Multiple Auger ionisation and fluorescence processes for Be to Zn

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...97..443k&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 97, no. 2, p. 443-482.

Astronomy and Astrophysics

Astrophysics

225

Auger Effect, Cosmic X Rays, Fluorescence, High Temperature Plasmas, Neutral Atoms, Optical Thickness, Photoionization, Beryllium, Hartree-Fock-Slater Method, Holes (Electron Deficiencies), Stellar Coronas, Supernova Remnants, Zinc

Scientific paper

The basic physical processes responsible for X-ray emission from thin plasmas are considered. Collisional ionization or photoionization of inner shells of neutral atoms and ions leads to the creation of a vacancy in one of the inner shells of the ion or atom, which is filled by a cascade of radiative (fluorescent) and nonradiative (Auger) transitions. The net result is the ejection of several electrons and photons, leaving the atom in a multiply ionized state. In this paper, the distribution of the number of emitted photons and electrons after the creation of a hole in an inner shell of an atom or ion is calculated for all ions from H to Zn. The method consists of two stages: the calculation of transition rates for a given electron configuration, and calculation of probabilities of the several cascade sequences using these transition rates.

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