Radiation-induced conductivity in quartz crystals
Journal Article
·
· J. Appl. Phys.; (United States)
Following room-temperature irradiation of quartz crystals by x rays or ..gamma.. rays, a transient enhancement of electrical conductivity is observed which decays over a period of several hours. This enhanced conductivity is produced by alkali ions (M/sup +/) which are liberated during the irradiation. By freezing in this transient conductivity of synthetic crystals to temperatures below 270 K, the activation energy E/sub m/ for migration of free alkali ions along c-axis channels of the crystal is shown to be 0.14 +- 0.01 eV. The activation energy for the annealing process is approx.0.5 eV, showing that annealing is not controlled by E/sub m/. Results on natural crystals following irradiation are quite different from those of the synthetics; the differences are explained in terms of the presence of shallow traps for free M/sup +/ ions in natural crystals. Finally, the transient conductivity is compared with other transient phenomena following irradiation, viz., the frequency change and internal friction of quartz-controlled oscillators.
- Research Organization:
- Henry Krumb School of Mines, Columbia University, New York, New York 10027
- OSTI ID:
- 5829433
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 53:1; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
ACTIVATION ENERGY
ALKALI METALS
ANNEALING
CHALCOGENIDES
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
CRYSTALS
DECAY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTROPHORESIS
ELEMENTS
ENERGY
FRICTION
HEAT TREATMENTS
INTERNAL FRICTION
IONIZING RADIATIONS
IONS
MATHEMATICAL MODELS
MEDIUM TEMPERATURE
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
QUARTZ
RADIATION EFFECTS
RADIATIONS
SILICON COMPOUNDS
SILICON OXIDES
TRANSIENTS
X RADIATION
360605* -- Materials-- Radiation Effects
ACTIVATION ENERGY
ALKALI METALS
ANNEALING
CHALCOGENIDES
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
CRYSTALS
DECAY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTROPHORESIS
ELEMENTS
ENERGY
FRICTION
HEAT TREATMENTS
INTERNAL FRICTION
IONIZING RADIATIONS
IONS
MATHEMATICAL MODELS
MEDIUM TEMPERATURE
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
QUARTZ
RADIATION EFFECTS
RADIATIONS
SILICON COMPOUNDS
SILICON OXIDES
TRANSIENTS
X RADIATION