Physics
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phrvl..54..110m&link_type=abstract
Physical Review Letters (ISSN 0031-9007), vol. 54, Jan. 14, 1985, p. 110-113.
Physics
661
Laser Outputs, Laser Plasma Interactions, Population Inversion, Selenium, Spontaneous Emission, X Ray Lasers, Electron Impact, Power Gain, X Ray Spectra, Yttrium
Scientific paper
Observations of amplified spontaneous emission at soft X-ray wavelengths are reported. An optical laser ionized thin foils of selenium to produce a population inversion of the 2p(5)3p and 2p(5)3s levels of the neonlike ion. Using three time-resolved, spectroscopic measurements, gain-length products up to 6.5 and gain coefficients of 5.5 + or - 1.0/cm were demonstrated for the J = 2 to 1 lines at 206.3 and 209.6 A. Considerable amplification for the same transitions in yttrium at 155.0 and 157.1 A was also observed.
Ceglio Natale M.
Eckart Mark J.
Hagelstein Peter L.
Hazi A. U.
MacGowan A. J.
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