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Proceedings Paper

Mercuric iodide thick films for radiological x-ray detectors
Author(s): Michael M. Schieber; Haim Hermon; Robert A. Street; Steve E. Ready; Asaf Zuck; Alexander I. Vilensky; Leonid Melekhov; Rubil Shatunovsky; Michael Lukach; Evgenie Meerson; Yehezkel Saado; Eithan Pinkhasy
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Paper Abstract

For the first time polycrystalline HgI2 photoconductor material directly evaporated on a-Si array for direct conversion of x-rays for imaging purposes, were successfully imaged at Xerox-Palo Alto Research Center. The initial results are very promising and show a high x-ray sensitivity and low leakage current. Since Ti-W alloys are used as pixel electrodes, an intermediate passivation layer must be used to prevent a chemical reaction with the detector plate. The thickness that these Polycrystalline HgI2 thick film detectors have been fabricated until now is up to 1,800 micrometers , which makes them useful also for high energy applications. The characterization of the Polycrystalline HgI2 thick films deposited with or without the passivation layers by measuring their dark currents, sensitivity to 65 and 85 kVp x-rays and residual signals after 1 minute of biasing, will be shown for several detectors. Some preliminary results will be shown for some novel screen-printed HgI2 detectors.

Paper Details

Date Published: 18 December 2000
PDF: 8 pages
Proc. SPIE 4142, Penetrating Radiation Systems and Applications II, (18 December 2000); doi: 10.1117/12.410563
Show Author Affiliations
Michael M. Schieber, Hebrew Univ. of Jerusalem and Sandia National Labs. (Israel)
Haim Hermon, Real Time Radiography Readout (Israel)
Robert A. Street, Xerox Palo Alto Research Ctr. (United States)
Steve E. Ready, Xerox Palo Alto Research Ctr. (United States)
Asaf Zuck, Hebrew Univ. of Jerusalem and Real Time Radiography Readout (Israel)
Alexander I. Vilensky, Real Time Radiography Readout (Israel)
Leonid Melekhov, Hebrew Univ. of Jerusalem and Real Time Radiography Readout (Israel)
Rubil Shatunovsky, Real Time Radiography Readout (Israel)
Michael Lukach, Hebrew Univ. of Jerusalem and Real Time Radiography Readout (Israel)
Evgenie Meerson, Real Time Radiography Readout (Israel)
Yehezkel Saado, Hebrew Univ. of Jerusalem and Real Time Radiography Readout (Israel)
Eithan Pinkhasy, Real Time Radiography Readout (Israel)


Published in SPIE Proceedings Vol. 4142:
Penetrating Radiation Systems and Applications II
F. Patrick Doty; H. Bradford Barber; Hans Roehrig; Edward J. Morton, Editor(s)

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