Radiation-induced defects in dense phases of crystalline and amorphous SiO sub 2

Journal Article · Sun Oct 01 00:00:00 EDT 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.7281· OSTI ID:5489968

Devine, R A.B. ^[1]; Hubner, K ^[2]

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1. Centre National d'Etudes des Telecommunications, Boite Postale No. 98, 38243 Meylan CEDEX, France (FR)
2. Sektion Physik, Wilhelm-Pieck-Universitat Rostock, Universitatsplatz 3, DDR-2500 Rostock, German Democratic Republic

We have studied electron-spin resonance in unirradiated and irradiated samples of naturally occurring stishovite. An unidentified central resonance ({ital g}{similar to}2.0030) with weak hyperfine lines is observed with a density 6{times}10{sup 14} per gram in unirradiated samples. Irradiation induces two sets of hyperfine lines, one sharp (1 gauss peak to peak) and one broad (14 gauss peak to peak) with hyperfine parameters {ital A}{sub {parallel}}=590 gauss, {ital A}{sub {perpendicular}}=457 gauss (sharp) and {ital A}{sub {parallel}}=525{sub {minus}15}{sup +0} gauss, {ital A}{sub {perpendicular}}=503{sub {minus}0}{sup +75} gauss, (broad). The latter set is consistent with {ital E}{sub 1}{sup {prime}} centers in densified, amorphous SiO{sub 2} with {rho}{ge}3.2 gm cm{sup {minus}3} whilst we identify the former with {ital E}{sub 1}{sup {prime}} defects in crystalline Stishovite. The hyperfine parameters for the crystalline phase cannot be interpreted simply in terms of the usual {ital s}-{ital p} electron model.

• OSTI ID: 5489968
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Vol. 40:10; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SILICON OXIDES
PHYSICAL RADIATION EFFECTS
AMORPHOUS STATE
COBALT 60
COLOR CENTERS
CRYSTALS
ELECTRON SPIN RESONANCE
GAMMA RADIATION
HYPERFINE STRUCTURE
LOW TEMPERATURE
MEDIUM TEMPERATURE
OXYGEN
VACANCIES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHALCOGENIDES
COBALT ISOTOPES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELECTROMAGNETIC RADIATION
ELEMENTS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MAGNETIC RESONANCE
MINUTES LIVING RADIOISOTOPES
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OXIDES
OXYGEN COMPOUNDS
POINT DEFECTS
RADIATION EFFECTS
RADIATIONS
RADIOISOTOPES
RESONANCE
SILICON COMPOUNDS
YEARS LIVING RADIOISOT
360605* - Materials- Radiation Effects