Il-VI WORKSHOP PurposeThe purpose of this Workshop is to bring together the universities and the industrial and governmental communities that work with II-VI materials which include HgCdTe and other IR materials, Il-VI semiconductor alloys used for x-ray and y-ray detectors, ZnSe-based Il-VI photonic materials, and II:VI photorefractive materials. The Workshop aims at advancing the understanding of the physics and chemistry of these materials. Areas of InterestAreas covered include a broad range of disciplines: materials engineering, intrinsio?' and extrinsic defects including doping, surface sciences, manufacturing/processing, electrical, optical, and magneto-optical properties as well as interactions between them. Workshop FormatTo provide more discussion time, the Workshop program will consist of about 50 papers.When appropriate, invited, encouraged, and contributed papers with a common theme will be grouped for presentation and then followed by an extensive discussion period. Scheduled morning and afternoon breaks as well as lunch, provided as part of the workshop fee, can also be used as additional discussion time. To further promote informal discussion and interaction, the first two days will conclude with a wine and: cheese break accompanied by table-top displays from commercial vendors displaying products and services of interest to the community.

Several studies have suggested that the uniformity of Cadmium Ziic Telhuide (CZT) detectors play an important role in their performance when operated as gamma-ray spectrometers [1]. However the detailed gamma response of simple planar detectors as a fiction of position over the device area is largely unknown. To address this issue we have built a system capable of measuring the detector response with a resolution of -250 pm. The system consists of a highly collimated (-200 pm) photon source (<150 kev) scanned over the detector using a computer controlle& two-axis translation stage. Fifteen samples configured as planar detectors were examined with the new apparatus. The material grade of the detectors examined varied fkom "counter" to "select discriminator". Two classes of spatial response vruiation were observed and are presented here. Infkwed (R) transmission images were also acquired for each sample and correlation between features in the puIse height spectrum and crystalline defects were observed,

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