Proton Irradiation Effects in Thorium

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"Iodide-processed thorium foils were irradiated with 9-Mev protons at temperatures below -140 degrees C. the recover of electrical resistance upon annealing was studied in the range 0 degrees to 75 degrees where tempering curves showed rapid changes taking place. Determinations of the activation energy associated with this process were made and the mean value obtained was 1.22 ev. Correlations of this result have been made with those found previously for copper. From these comparisons, a tentative assignment of the motion of interstitial atoms in thorium has been made for this process. In addition, some evidence has been found which illustrates … continued below

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16 p. : ill., tables

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Meechan, Charles J. December 15, 1954.

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"Iodide-processed thorium foils were irradiated with 9-Mev protons at temperatures below -140 degrees C. the recover of electrical resistance upon annealing was studied in the range 0 degrees to 75 degrees where tempering curves showed rapid changes taking place. Determinations of the activation energy associated with this process were made and the mean value obtained was 1.22 ev. Correlations of this result have been made with those found previously for copper. From these comparisons, a tentative assignment of the motion of interstitial atoms in thorium has been made for this process. In addition, some evidence has been found which illustrates the corrosive action that water has on thorium at temperaturs as low as 0 degrees C."

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16 p. : ill., tables

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Digitized from microopaque cards (1).

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  • SuDoc Number: Y 3.At 7:22/NAA-SR-1079
  • Report No.: NAA-SR-1079
  • Accession or Local Control No: metadc1250164
  • Archival Resource Key: ark:/67531/metadc1250164

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  • December 15, 1954

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  • Aug. 10, 2021, 7:36 a.m.

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  • March 17, 2022, 12:36 p.m.

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Meechan, Charles J. Proton Irradiation Effects in Thorium, report, December 15, 1954; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc1250164/: accessed January 16, 2026), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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