| Issue |
Europhys. Lett.
Volume 60, Number 5, December 2002
|
|
|---|---|---|
| Page(s) | 710 - 716 | |
| Section | Physics of gases, plasmas and electric discharges | |
| DOI | https://doi.org/10.1209/epl/i2002-00366-3 | |
| Published online | 01 November 2002 | |
-radiation from relativistic laser-produced plasmas
Institut für Optik und Quantenelektronik,
Friedrich-Schiller-Universität
Max-Wien-Platz 1, 07743 Jena, Germany
Corresponding author: ewald@ioq.uni-jena.de
Received:
19
July
2002
Accepted:
24
September
2002
We present systematic investigations on the generation of
titanium -radiation (E=4.5
) from plasmas
produced with ultrashort, high-intensity laser pulses. A maximum
-yield appears at a laser intensity of about 
, corresponding to a plasma electron
temperature of a few times the photon energy. We
observe a second increase in the -emission yield at
intensities higher than a few times 1018
, due to
the increase in the K-shell ionization cross-section for
relativistic electrons. The intensity dependence of the
-yield is modeled by an analytical expression, only
including cross-section, pathlength and electron energy
distribution.
PACS: 52.38.Ph – X-ray, γ-ray and particle generation / 52.27.Ny – Relativistic plasmas
© EDP Sciences, 2002
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