Opacity measurements: extending the range and filling in the gaps

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A series of experiments to explore Ge opacity at temperatures where the M-shell is almost filled will be discussed. Data are obtained at lower temperatures than previously explored and allow us to investigate the role of atomic structure calculations and their impact on opacity scalings. The experiment uses the Nova laser to irradiate a gold hohlraum within which a CH-tamped Ge sample is radiatively heated. A Nd backlight probes the sample 2 ns later to produce Ge spectral absorption features in the 1.2-1.5 keV energy range. Temperature is monitored by the use of an Al dopant and density is monitored ... continued below

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24 p.; Other: FDE: PDF; PL:

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Back, C.A.; Perry, T.S.; Bach, D.R.; Wilson, G.; Iglesias, G.A.; Laden, O.L. et al. March 17, 1997.

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Description

A series of experiments to explore Ge opacity at temperatures where the M-shell is almost filled will be discussed. Data are obtained at lower temperatures than previously explored and allow us to investigate the role of atomic structure calculations and their impact on opacity scalings. The experiment uses the Nova laser to irradiate a gold hohlraum within which a CH-tamped Ge sample is radiatively heated. A Nd backlight probes the sample 2 ns later to produce Ge spectral absorption features in the 1.2-1.5 keV energy range. Temperature is monitored by the use of an Al dopant and density is monitored by measuring the edge-on expansion of the sample. Temporal resolution of about 200 ps is obtained by using a short pulse backlight. Calculations in this photon energy region show significant changes in the spectral features.

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24 p.; Other: FDE: PDF; PL:

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OSTI as DE98050879

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  • Biennial meeting on the radiative properties of hot dense matter, Santa Barbara, CA (United States), 4 Nov 1996

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  • Other: DE98050879
  • Report No.: UCRL-JC--125406
  • Report No.: CONF-961164--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 328495
  • Archival Resource Key: ark:/67531/metadc683995

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  • March 17, 1997

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 17, 2016, 3:15 p.m.

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Back, C.A.; Perry, T.S.; Bach, D.R.; Wilson, G.; Iglesias, G.A.; Laden, O.L. et al. Opacity measurements: extending the range and filling in the gaps, article, March 17, 1997; California. (digital.library.unt.edu/ark:/67531/metadc683995/: accessed August 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.