Deuterium adsorption on water preadsorbed uranium-niobium alloys

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We have investigated the adsorptiodreaction of deuterium on water pre-adsorbed oxidized uranium-niobium alloys at pressures near 1 Torr. Deuterium exposures were conducted at pressures from 1 to 4 Torr at surface temperatures between 300 and 600 K using a fixed dosing time of 30 seconds. Water is preadsorbed at room temperature at a pressure of {approx} 1 Torr for 30 seconds. Subsequent to gaseous exposure the surface temperature of the alloy was increased in a controlled manner and deuterium desorption was monitored using mass spectroscopy. Deuterium is observed to adsorb both at the surface and in the bulk of the ... continued below

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1 p.

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Jachimowski, T. A. (Thomas Alan); Paffett, M. T. (Mark T.); Kelly, D. (Daniel) & Hanrahan, R. J. (Robert J.) January 1, 2002.

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Description

We have investigated the adsorptiodreaction of deuterium on water pre-adsorbed oxidized uranium-niobium alloys at pressures near 1 Torr. Deuterium exposures were conducted at pressures from 1 to 4 Torr at surface temperatures between 300 and 600 K using a fixed dosing time of 30 seconds. Water is preadsorbed at room temperature at a pressure of {approx} 1 Torr for 30 seconds. Subsequent to gaseous exposure the surface temperature of the alloy was increased in a controlled manner and deuterium desorption was monitored using mass spectroscopy. Deuterium is observed to adsorb both at the surface and in the bulk of the uranium-niobium alloys. Water preadsorption prevents deuterium adsorption on all surfaces. The water forms a surface passivation layer at low temperatures that prevents deuterium uptake into the bulk and surface of the sample. As the adsorption temperature of the deuterium increases the amount of deuterium that adsorbs also increases.

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1 p.

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  • Submitted to: Annual American Physical Society March meeting, March 3-7, 2003; Austin Convention Center; Austin, TX

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  • Report No.: LA-UR-02-7426
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976472
  • Archival Resource Key: ark:/67531/metadc930024

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

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  • January 1, 2002

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 9, 2016, 11:14 p.m.

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Jachimowski, T. A. (Thomas Alan); Paffett, M. T. (Mark T.); Kelly, D. (Daniel) & Hanrahan, R. J. (Robert J.). Deuterium adsorption on water preadsorbed uranium-niobium alloys, article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc930024/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.