Influence of infrared stimulation on spectroscopy characteristics of co-planar grid CdZnTe detectors
- ZRF RITEC SIA, (Latvia)
It was previously found that illumination with monochromatic infrared (IR) light with wavelengths close to the absorption edge of the CdZnTe exert significant positive influence on the spectrometric characteristics of quasi-hemispherical CdZnTe detectors at room temperature. In this paper, preliminary results of IR stimulation on the spectrometric characteristics of coplanar-grid CdZnTe detectors as well as results of further studies of planar and quasi-hemispherical detectors are presented. Coplanar-grid detectors of 10 mm x 10 mm x 10 mm from Redlen Technologies and commercial available IR LEDs with different wavelengths of 800-1000 nm were used in the experiments. Influence of intensity and direction of IR illumination on the detector's characteristics was studied. Analysis of signals shapes from the preamplifiers outputs at registration of alpha particles showed that IR illumination leads to a change in the shapes of these signals. This may indicate changes in electric fields distributions. An improvement in energy resolution at gamma-energy of 662 keV was observed with quasi-hemispherical and co-planar detectors at the certain levels of IR illumination intensity. The most noticeable effect of IR stimulation was observed with quasi-hemispherical detectors. It is due with optimization of charge collection conditions in the quasi-hemispherical detectors under IT stimulation. (authors)
- Research Organization:
- Institute of Electrical and Electronics Engineers - IEEE, 3 Park Avenue, 17th Floor, New York, N.Y. 10016-5997 (United States)
- OSTI ID:
- 22531454
- Report Number(s):
- ANIMMA-2015-IO-66; TRN: US16V0224102395
- Resource Relation:
- Conference: ANIMMA 2015: 4. International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications, Lisboa (Portugal), 20-24 Apr 2015; Other Information: Country of input: France; 47 Refs.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ABSORPTION
ALPHA PARTICLES
CADMIUM COMPOUNDS
CHARGE COLLECTION
ELECTRIC FIELDS
ENERGY RESOLUTION
GAMMA DETECTION
ILLUMINANCE
INFRARED RADIATION
KEV RANGE
MONOCHROMATIC RADIATION
OPTIMIZATION
PREAMPLIFIERS
SEMICONDUCTOR DETECTORS
STIMULATION
VISIBLE RADIATION
WAVELENGTHS
ZINC TELLURIDES