High-frequency photoabsorption by an ion immersed in a plasma as calculated from Bloch’s hydrodynamic model

K Ishikawa and B.u Felderhof

Physica A: Statistical Mechanics and its Applications, 1998, vol. 253, issue 1, 541-554

Abstract: The high-frequency behavior of the photoabsorption cross section of an ion immersed in a plasma is investigated in the framework of the Thomas–Fermi model, supplemented with Bloch’s hydrodynamic equations. It is shown that the singular nature of the electron density profile near the point nucleus, derived in Thomas–Fermi approximation, causes enhanced high-frequency absorption proportional to the inverse square of frequency. According to an exact quantummechanical relation the electron density profile is not singular. It is shown that in the hydrodynamic model a regular density profile leads to a photoabsorption cross section which decays as the inverse sixth power of frequency. Thus for a regular density profile collective effects described in the hydrodynamic model rapidly become less important at high frequency. In this regime the photoabsorption cross section is dominated by single electron inverse bremsstrahlung.

Keywords: Photoabsorption; Plasma; Dielectric function (search for similar items in EconPapers)
Date: 1998
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S037843719800065X
Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:253:y:1998:i:1:p:541-554

DOI: 10.1016/S0378-4371(98)00065-X

Access Statistics for this article

Physica A: Statistical Mechanics and its Applications is currently edited by K. A. Dawson, J. O. Indekeu, H.E. Stanley and C. Tsallis

More articles in Physica A: Statistical Mechanics and its Applications from Elsevier
Bibliographic data for series maintained by Catherine Liu ().