Optical detection of impurities and defects in detector-grade mercuric iodide vandenBerg, L.
Abstract
Fourier tranform infrared spectroscopy (FTIR) and low-temperature photoluminescence were used to study impurities and defects in mercuric iodide crystals. FTIR spectra of the transmittance and reflectance were obtained in the 400 to 4000 cm sup minus 1 range, and the results were found to vary for different samples due to the presence of impurities and stoichiometry deviations. The photoluminescence data were found to consist primarily of three distinct emission bands. The lowest energy band at about 680 nm (at 4.2 K) was shown to be related to the performance of nuclear radiation detectors fabricated from these samples. Further correlations between the spectral features obtained from FTIR and photoluminescence techniques and the detector response are also noted.
- Publication:
-
Presented at the 6th International Workshop on Compound Semiconductors for Room Temperature X-Ray and Nuclear Detectors
- Pub Date:
- 1987
- Bibcode:
- 1987csrt.work.....J
- Keywords:
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- Crystals;
- Detection;
- Impurities;
- Infrared Spectroscopy;
- Iodides;
- Mercury Compounds;
- Optical Measurement;
- Photoluminescence;
- Fourier Transformation;
- Nondestructive Tests;
- Photometers;
- Solid-State Physics