Abstract

New spectral lines of Al xii, emitted by aluminum laser-produced plasmas, have been identified in the extreme-ultraviolet region and their transitions classified. As many as eight beams of the Omega laser system of the Laboratory for Laser Energetics at the University of Rochester were linearly focused onto aluminum-coated flat targets to produce linear plasma radiation sources from 3 to 6 mm long. The spectra were photographed edge-on, using a grazing-incidence spectrograph. The new lines are classified as 2s−3p, 2p−3d, 2p−4d, 3p−4d, and 3d−4f transitions. Ionization differentiation is based on comparing the present data with aluminum spectra obtained with other sources under different ionization conditions, while line identification is based on comparison with calculated wavelengths and oscillator strengths.

© 1989 Optical Society of America

Identification of hydrogenlike and heliumlike transitions in the spectrum of laser-produced magnesium plasmas

J. C. Moreno, S. Goldsmith, H. R. Griem, Leonard Cohen, and J. Knauer
J. Opt. Soc. Am. B 7(5) 704-707 (1990)

Wavelengths and energy levels for Ge xxiv, Ge xxv, and Ge xxvi observed in plasmas produced by line-focus laser irradiation

U. Feldman, J. O. Ekberg, C. M. Brown, and J. F. Seely
J. Opt. Soc. Am. B 6(9) 1652-1655 (1989)

Spectroscopic study of plasmas produced by a laser equipped with distributed phase plates

S. Goldsmith, J. C. Moreno, H. R. Griem, Leonard Cohen, and J. Knauer
J. Opt. Soc. Am. B 10(7) 1137-1142 (1993)

Soft-x-ray amplification in lithiumlike Al xi (154 Å) and Si xii (129 Å)

D. Kim, C. H. Skinner, A. Wouters, E. Valeo, D. Voorhees, and S. Suckewer
J. Opt. Soc. Am. B 6(1) 115-125 (1989)

Identification of new Ti xxi and Ti xix transitions emitted by laser-produced plasmas

J. C. Moreno, S. Goldsmith, H. R. Griem, Leonard Cohen, and M. C. Richardson
J. Opt. Soc. Am. B 4(12) 1931-1933 (1987)