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High-Energy Electron Irradiation of Germanium and Tellurium

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.1735299· OSTI ID:4203384
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Tellurium samples in which current flowed parallel to the c axis were irradiated at 78 deg K with 20-Mev electrons. The conductivity increased linearly with a slope of 1.0 x 10-14 (ohm-cm)-1 per electron/cm2 up to at least 3 x 1014 electrons/cm2. Beyond 3 x 1015 electrons/ cm2 the slope was approximately one tenth of the initial value. The reciprocal of the Hall coefficient decreased at first and then increased. Between 1 x 1013 and 5 x 1013 electrons/cm21/RH increases linearly from 3 x 10-5 to 6.3 x 10-5 coulomb/cm3. After irradiation, the samples showed no measurable conductivity changes during 14 hr at 78 deg K. After a day's anneal at 300 deg K the 78 deg K conductivity returned to its preirradiation value. N-type germanium was irradiated with 20-Mev electrons at room temperature. Conductivity measurements indicated that the sample became intrinsic and then p type. However, the detailed dependence of conductivity on radiation dosage did not agree with a calculation based on four energy levels introduced into the gap. Carrier lifetime changes were also observed.
Research Organization:
General Atomics Div., General Dynamics Corp., San Diego, Calif.
Sponsoring Organization:
USDOE
NSA Number:
NSA-13-020606
OSTI ID:
4203384
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 30; ISSN JAPIAU; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANNEALING
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRONS
ENERGY LEVELS
GERMANIUM
HALL EFFECT
LIFETIME
LOW TEMPERATURE
RADIATION DOSES
RADIATION EFFECTS
SEMICONDUCTORS
TELLURIUM