Study of stoichiometry in mercuric iodide by low-temperature photoluminescence spectroscopy

Xue Jun Bao; Ralph B. James; C.-Y. Hung; Tuviah E. Schlesinger; A. Y. Cheng; Carol Ortale; Lodewijk Van den Berg

doi:10.1117/12.140487

3 February 1993 Study of stoichiometry in mercuric iodide by low-temperature photoluminescence spectroscopy

Xue Jun Bao, Ralph B. James, C.-Y. Hung, Tuviah E. Schlesinger, A. Y. Cheng, Carol Ortale, Lodewijk Van den Berg

Proceedings Volume 1736, X-Ray Detector Physics and Applications; (1993) https://doi.org/10.1117/12.140487
Event: San Diego '92, 1992, San Diego, CA, United States

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 HgI_{2/ 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.

Citation Download Citation

Xue Jun Bao, Ralph B. James, C.-Y. Hung, Tuviah E. Schlesinger, A. Y. Cheng, Carol Ortale, and Lodewijk Van den Berg "Study of stoichiometry in mercuric iodide by low-temperature photoluminescence spectroscopy", Proc. SPIE 1736, X-Ray Detector Physics and Applications, (3 February 1993); https://doi.org/10.1117/12.140487

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