Production of point defects in 14.8 MeV neutron-irradiated MgO

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High-purity MgO crystals grown at ORNL were irradiated in the LLL 14.8- MeV Rotating Target Neutron Source (RTNS) to doses varying from 1.8 x 10$sup 15$ to 5.7 x 10$sup 17$ n/cm$sup 2$. The optical absorption spectra of these crystals resembled those irradiated in fission reactors and exhibited bands principally at 4.95, 3.5, 2.2, and 1.3 eV. The band with the largest absorption coefficient, that at 4.95 eV, is due to anion vacancies. The bands at 3.5 and 1.3 eV, attended by zero-phonon lines at 3.430 and 1.187 eV respectively, are attributed to different optical transitions of anion divacancies. The ... continued below

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9 p.

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Chen, Y.; Abraham, M.M.; Robinson, M.T.; Mitchell, J.B. & Van Konynenburg, R.A. September 1, 1975.

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High-purity MgO crystals grown at ORNL were irradiated in the LLL 14.8- MeV Rotating Target Neutron Source (RTNS) to doses varying from 1.8 x 10$sup 15$ to 5.7 x 10$sup 17$ n/cm$sup 2$. The optical absorption spectra of these crystals resembled those irradiated in fission reactors and exhibited bands principally at 4.95, 3.5, 2.2, and 1.3 eV. The band with the largest absorption coefficient, that at 4.95 eV, is due to anion vacancies. The bands at 3.5 and 1.3 eV, attended by zero-phonon lines at 3.430 and 1.187 eV respectively, are attributed to different optical transitions of anion divacancies. The investigations indicate that the net production rates of the point defects resulting from irradiations with 14.8-MeV neutrons are about twice those resulting from fission neutrons in the Oak Ridge Reactor (ORR). This ratio is in reasonable accord with theoretical estimates based on damage energy calculations. (auth)

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9 p.

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Dep. NTIS

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  • International conference on radiation effects and tritium technology for fusion reactors, Gatlinburg, Tennessee, USA, 1 Oct 1975

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  • Report No.: CONF-751026--6
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 4142899
  • Archival Resource Key: ark:/67531/metadc863814

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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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  • September 1, 1975

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  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 11, 2017, 3:15 p.m.

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Chen, Y.; Abraham, M.M.; Robinson, M.T.; Mitchell, J.B. & Van Konynenburg, R.A. Production of point defects in 14.8 MeV neutron-irradiated MgO, article, September 1, 1975; Tennessee. (digital.library.unt.edu/ark:/67531/metadc863814/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.