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Time resolved luminescence spectroscopy of alkaline earth oxides after pulsed electron beam irradiation. II. Spectra and thresholds of MgO

Journal Article · · J. Chem. Phys.; (United States)
DOI:https://doi.org/10.1063/1.456105· OSTI ID:6885710
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Time-resolved luminescence spectroscopy has been used to study the emissions occurring in MgO in the time range 100 ns to 100 ..mu..s after irradiation with nanosecond duration pulses of electrons of energy between 0.2 and 3.0 MeV. An emission at approx.380 nm with a threshold energy of 0.28 +- 0.01 MeV is attributed to processes resulting from the displacement of oxygen anions and the formation of F/sup +/ centers. An emission at approx.240 nm is attributed to processes resulting from the displacement of magnesium cations, with a threshold energy of 0.32 +- 0.01 MeV. An emission at approx.470 nm at an electron energy of 3.0 MeV is attributed to processes resulting from the formation of aggregates of F/sup +/ centers, such as the F/sup 2+//sub 2/ center. Displacement energies of 49 +- 2 and 38 +- 2 eV were estimated for oxygen anions and magnesium cations, respectively.
Research Organization:
Department of Physical Chemistry, University of Melbourne, Parkville, Victoria 3052, Australia
OSTI ID:
6885710
Journal Information:
J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 90:2; ISSN JCPSA
Country of Publication:
United States
Language:
English

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Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ALKALINE EARTH METAL COMPOUNDS
BEAMS
CHALCOGENIDES
CHEMICAL RADIATION EFFECTS
CHEMISTRY
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELECTRON BEAMS
EMISSION SPECTRA
EMISSION SPECTROSCOPY
ENERGY RANGE
F CENTERS
FLUORESCENCE SPECTROSCOPY
KEV RANGE
KEV RANGE 100-1000
LEPTON BEAMS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MEV RANGE
MEV RANGE 01-10
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
POINT DEFECTS
RADIATION CHEMISTRY
RADIATION EFFECTS
SPECTRA
SPECTROSCOPY
VACANCIES