Electronic characterization of mercuric iodide gamma ray spectrometers
During the past four years the yield of high resolution mercuric iodide (HgI[sub 2]) gamma ray spectrometers produced at EG G/EM has increased dramatically. Data is presented which demonstrates a strong correlation between starting material and spectrometer performance. Improved spectrometer yields are attributed to the method of HgI[sub 2] synthesis and to material purification procedures. Data is presented which shows that spectrometer performance is correlated with hole mobility-lifetime products. In addition, the measurement of Schottky barrier heights on HgI[sub 2] spectrometers has been performed using I-V curves and the photoelectric method. Barrier heights near 1.1 eV have been obtained using various contacts and contact deposition methods. These data suggest the pinning of the Fermi level at midgap at the HgI[sub 2] surface, probably due to surface states formed prior to contact deposition.
- Research Organization:
- EG and G Energy Measurements, Inc., Goleta, CA (United States). Santa Barbara Operations
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC08-88NV10617
- OSTI ID:
- 6337510
- Report Number(s):
- EGG-10617-2182; CONF-930405-22; ON: DE93015524
- Resource Relation:
- Conference: Spring meeting of the Materials Research Society, San Francisco, CA (United States), 12-16 Apr 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GAMMA SPECTROMETERS
ELECTRICAL PROPERTIES
PERFORMANCE
MERCURY IODIDES
PURIFICATION
SYNTHESIS
DATA
DEPOSITION
FERMI LEVEL
GAMMA RADIATION
HOLE MOBILITY
LIFETIME
RESOLUTION
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
IODIDES
IODINE COMPOUNDS
IONIZING RADIATIONS
MEASURING INSTRUMENTS
MERCURY COMPOUNDS
MERCURY HALIDES
MOBILITY
PHYSICAL PROPERTIES
RADIATIONS
SPECTROMETERS
440103* - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation