Tritiation of aerogel matrices: T sub 2 O, tritiated organics and tritium exchange on aerogel surfaces

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Three methods for incorporation of tritium into the phoshor/aerogel matrix have been demonstrated: (1) adsorption of T{sub 2}O by the aerogel, (2) incorporation of tritiated organic into the pores of the aerogel and (3) isotopic exchange of tritium from T{sub 2} gas for the H residing on the surface of the aerogel. Adsorption of T{sub 2}O produces the brightest light (4.4 fL) to date but the tritium is loosely bound. Incorporation of tritiated organics into the pores of the aerogel produces less that theoretical luminance and intensity diminishes rapidly due to precipitation and darkening of the organic from radiation damage. ... continued below

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Pages: (13 p)

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Ellefson, R.E.; Gill, J.T. (EG and G Mound Applied Technologies, Miamisburg, OH (USA)); Shepodd, T.J. (Sandia Labs., Livermore, CA (USA)) & Leonard, L.E. (USDOE, Washington, DC (USA)) January 1, 1990.

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Three methods for incorporation of tritium into the phoshor/aerogel matrix have been demonstrated: (1) adsorption of T{sub 2}O by the aerogel, (2) incorporation of tritiated organic into the pores of the aerogel and (3) isotopic exchange of tritium from T{sub 2} gas for the H residing on the surface of the aerogel. Adsorption of T{sub 2}O produces the brightest light (4.4 fL) to date but the tritium is loosely bound. Incorporation of tritiated organics into the pores of the aerogel produces less that theoretical luminance and intensity diminishes rapidly due to precipitation and darkening of the organic from radiation damage. Isotopic exchange produces a stable lamp by tritiating H sites on the surface of the aerogel. A lamp with stable luminance of 1.1 fL has been produced; a theoretical limit for a mono-layer coverage fo the aerogel surface is 2 to 3 fL. 7 refs., 4 figs., 2 tabs.

Physical Description

Pages: (13 p)

Notes

NTIS, PC A03/MF A01 - OSTI; GPO Dep.

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  • Radioluminescent technology conference, Annapolis, MD (USA), 25-26 Sep 1990

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  • Other: DE91002702
  • Report No.: MLM-3660(OP)
  • Report No.: CONF-9009201--8
  • Grant Number: AC04-88DP43495
  • Grant Number: AC04-76DR00789
  • Office of Scientific & Technical Information Report Number: 6530388
  • Archival Resource Key: ark:/67531/metadc1185833

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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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  • January 1, 1990

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  • July 3, 2018, 8:14 a.m.

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  • Dec. 13, 2018, 5:24 p.m.

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Ellefson, R.E.; Gill, J.T. (EG and G Mound Applied Technologies, Miamisburg, OH (USA)); Shepodd, T.J. (Sandia Labs., Livermore, CA (USA)) & Leonard, L.E. (USDOE, Washington, DC (USA)). Tritiation of aerogel matrices: T sub 2 O, tritiated organics and tritium exchange on aerogel surfaces, article, January 1, 1990; United States. (https://digital.library.unt.edu/ark:/67531/metadc1185833/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.