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Photoabsorption by an ion immersed in a plasma at any temperature

Published online by Cambridge University Press:  01 November 1998

K. ISHIKAWA ,
B. U. FELDERHOF ,
T. BLENSKI  and
B. CICHOCKI
K. ISHIKAWA
Affiliation:
Institut für Theoretische Physik A, RWTH Aachen, Templergraben 55, 52056 Aachen, Germany
B. U. FELDERHOF
Affiliation:
Institut für Theoretische Physik A, RWTH Aachen, Templergraben 55, 52056 Aachen, Germany
T. BLENSKI
Affiliation:
DSM/DRECAM/SPAM, CEA Saclay, F91191 Gif-sur-Yvette Cedex, France
B. CICHOCKI
Affiliation:
Institute of Theoretical Physics, Warsaw University, Hoza 69, 00-618 Warsaw, Poland
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Abstract

The photoabsorption cross-section of an ion immersed in a plasma is studied on the basis of the Thomas–Fermi approximation for the equilibrium electron distribution and Bloch's classical hydrodynamic model for collective motion of the electrons. The frequency-dependent cross-section scales with the nuclear charge, and depends strongly on the plasma density and temperature. An approximation of the frequency dependence is constructed with the aid of sum rules and Padé approximants.

Type
Research Article
Information
Journal of Plasma Physics , Volume 60 , Issue 4 , November 1998 , pp. 787 - 810
Copyright
1998 Cambridge University Press

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