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Proceedings Paper

Emission Of Lithiumlike Transitions From Dense Plasmas Created By Picosecond KrF Laser Pulses
Author(s): J F Seely; U Feldman; C H Nam; W Tighe; S Suckewer; L A Woltz
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Paper Abstract

Broad spectral lines have been observed in the high-resolution extreme ultraviolet (XUV) spectra from plasmas created by irradiating solid targets using picosecond laser pulses. Transitions of the type n=2-3 and n=2-4 in Li-like ions of the elements N, 0, F, and Al have linewidths up to 2 Å. Using quasistatic ion Stark broadening, the electron densities of the plasma emission regions have been derived from the linewidths. The derived electron densities are found to be inversely proportional to the lifetimes of the upper levels of the transitions. The electron densities range from 2 x 1022 cm-3 for levels with lifetimes less than 4 picoseconds to 1021 cm-3 for levels with lifetimes greater than 30 picoseconds. In effect, the XUV emission is time-resolved in the expanding plasma. The observation of emission from solid-density regions (greater than 4 x 1023 cm-3) will require transitions from levels in highly charged ions with lifetimes less than a picosecond.

Paper Details

Date Published: 11 July 1988
PDF: 5 pages
Proc. SPIE 0913, High Intensity Laser-Matter Interactions, (11 July 1988); doi: 10.1117/12.965141
Show Author Affiliations
J F Seely, Naval Research Laboratory (United States)
U Feldman, Naval Research Laboratory (United States)
C H Nam, Princeton University (United States)
W Tighe, Princeton University (United States)
S Suckewer, Princeton University (United States)
L A Woltz, National Bureau of Standards (United States)

Published in SPIE Proceedings Vol. 0913:
High Intensity Laser-Matter Interactions
Hector A. Baldis; E. Michael Campbell, Editor(s)

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