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Proceedings Paper

Study of stoichiometry in mercuric iodide by low-temperature photoluminescence spectroscopy
Author(s): Xue Jun Bao; Ralph B. James; C.-Y. Hung; Tuviah E. Schlesinger; A. Y. Cheng; Carol Ortale; Lodewijk Van den Berg
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Paper Abstract

Low temperature (4.2 K) photoluminescence spectroscopy (PL) measurements were performed on mercuric iodide (HgI2) crystals that were surface-doped with either iodine or mercury. Two methods of treatment were used to achieve the surface doping. The first is the direct immersion of HgI2 samples into potassium iodide (KI) aqueous solution saturated with iodine or immersion into elemental mercury liquid. The second is the storage of HgI2 crystals under either iodine or mercury vapor. Certain features in the PL spectra were correlated with the stoichiometry of the HgI2/ crystals modified by the surface doping. It was also found that if HgI(subscript 2 was exposed to air, an iodine deficient surface layer would form within a one-day period due to the preferential loss of iodine. Finally, the behavior of a broad emission band in the PL spectra and its implication in the fabrication of high quality HgI2 nuclear detector is discussed.

Paper Details

Date Published: 3 February 1993
PDF: 11 pages
Proc. SPIE 1736, X-Ray Detector Physics and Applications, (3 February 1993); doi: 10.1117/12.140487
Show Author Affiliations
Xue Jun Bao, Carnegie Mellon Univ. (United States)
Ralph B. James, Sandia National Labs. (United States)
C.-Y. Hung, Carnegie Mellon Univ. (United States)
Tuviah E. Schlesinger, Carnegie Mellon Univ. (United States)
A. Y. Cheng, EG&G Energy Measurements Group (United States)
Carol Ortale, EG&G Energy Measurements Group (United States)
Lodewijk Van den Berg, EG&G Energy Measurements Group (United States)


Published in SPIE Proceedings Vol. 1736:
X-Ray Detector Physics and Applications
Richard B. Hoover, Editor(s)

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