Quantitative XRFA of carbon in a special matrix by the fundamental parameter method

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Description

We report on results obtained from experiments using specially prepared carbon substrates and treatment of the data by means of recently introduced theory. Medium Z grids with known parameters have been coated on top of pyrolytic carbon substrates to achieve well defined absorption geometries. The various copper grids exhibit satisfactory performance in terms of mechanical stability, homogeneity and uniformity of the coating. A detailed study of the measurement results shows that there is a more rapid increase of the associated C-K{alpha} countrate from the coated samples compared to the pure elements and is attributed to the contribution of secondary enhancement ... continued below

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12 p.

Creation Information

Weber, F.A.; Da Silva, L.B.; Barbee, T.W. Jr.; Ciarlo, D. & Mantler, M. May 1, 1996.

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Description

We report on results obtained from experiments using specially prepared carbon substrates and treatment of the data by means of recently introduced theory. Medium Z grids with known parameters have been coated on top of pyrolytic carbon substrates to achieve well defined absorption geometries. The various copper grids exhibit satisfactory performance in terms of mechanical stability, homogeneity and uniformity of the coating. A detailed study of the measurement results shows that there is a more rapid increase of the associated C-K{alpha} countrate from the coated samples compared to the pure elements and is attributed to the contribution of secondary enhancement effects, including those resulting from photoelectrons generated after the primary ionization. A variety of multilayer analyzers has also been evaluated during these experiments. Only a certain combination of muitilayer component materials have been found to be appropriate for use as dispersing elements due to the reflectivity and spatial resolution requirements of our long wavelength spectrometer. Another experimental factor is the low intensity of available tube photons which is due to the selection of the target material and absorption effects in the target as well as the tube window. 12 refs., 7 figs., 2 tabs.

Physical Description

12 p.

Notes

OSTI as DE96012229

Source

  • 44. annual Denver x-ray conference, Colorado Springs, CO (United States), 31 Jul - 4 Aug 1995

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  • Other: DE96012229
  • Report No.: UCRL-JC--124249
  • Report No.: CONF-9507175--3
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/264594 | External Link
  • Office of Scientific & Technical Information Report Number: 264594
  • Archival Resource Key: ark:/67531/metadc665053

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • May 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

Description Last Updated

  • June 24, 2016, 7:54 p.m.

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Weber, F.A.; Da Silva, L.B.; Barbee, T.W. Jr.; Ciarlo, D. & Mantler, M. Quantitative XRFA of carbon in a special matrix by the fundamental parameter method, report, May 1, 1996; California. (digital.library.unt.edu/ark:/67531/metadc665053/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.