Effects of gamma-ray irradiation on dislocations in sodium nitrate single crystals

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The topography of the etch pits formed on the (100) cleavage surfaces of unirradiated and irradiated NaNO/sub 3/ single crystals has been studied. The principal etch pit alignments are consistent with dislocation families of the type (100) (011), (211) (011), and (111) (011). The pit density increases from 1.4 (+-0.2) x 10/sup 4//cm/sup 2/ at zero dose to 7.3 (+-0.2) x 10/sup 5//cm/sup 2/ at 5.0 x 10/sup 8/ rad. With increasing dose the pit density distribution narrows and clusters at 1.0 x 10/sup 6/ pits/cm/sup 2/ at doses above 5.0 x 10/sup 8/ rad. Above this dose radiolytic-induced micro ... continued below

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Pages: 7

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Solnick-Legg, H.; Herley, P.J. & Levy, P.W. December 1, 1984.

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The topography of the etch pits formed on the (100) cleavage surfaces of unirradiated and irradiated NaNO/sub 3/ single crystals has been studied. The principal etch pit alignments are consistent with dislocation families of the type (100) (011), (211) (011), and (111) (011). The pit density increases from 1.4 (+-0.2) x 10/sup 4//cm/sup 2/ at zero dose to 7.3 (+-0.2) x 10/sup 5//cm/sup 2/ at 5.0 x 10/sup 8/ rad. With increasing dose the pit density distribution narrows and clusters at 1.0 x 10/sup 6/ pits/cm/sup 2/ at doses above 5.0 x 10/sup 8/ rad. Above this dose radiolytic-induced micro bumps or structures are observed that precede the onset of radiolytic decomposition that is visible at 2.5 x 0/sup 9/ rad. These asymmetric structures appear to nucleate at the same sites as the chemically created etch pits and are aligned in the same principal directions. These observations indicate that dislocations are important sites for nucleating radiation induced decomposition and internal radiolytic gas generation. 12 references, 9 figures, 1 table.

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Pages: 7

Notes

NTIS, PC A02/MF A01; 1.

Source

  • 10. international symposium on reactivity of solids, Dijon, France, 1 Aug 1984

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  • Other: DE85008291
  • Report No.: BNL-35775
  • Report No.: CONF-8408151-1
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 6052850
  • Archival Resource Key: ark:/67531/metadc1105374

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  • December 1, 1984

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  • Feb. 22, 2018, 7:45 p.m.

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  • March 22, 2018, 9:55 p.m.

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Solnick-Legg, H.; Herley, P.J. & Levy, P.W. Effects of gamma-ray irradiation on dislocations in sodium nitrate single crystals, article, December 1, 1984; United States. (digital.library.unt.edu/ark:/67531/metadc1105374/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.