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Proceedings Paper

Nuclear microprobe studies of the electronic transport properties of cadmium zinc telluride (CZT) radiation detectors
Author(s): Gyorgy Vizkelethy; Barney L. Doyle; David S. Walsh; Ralph B. James
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Paper Abstract

Ion Beam Induced Charge Collection (IBICC) is a proven albeit relatively new method to measure the electronic transport properties of room temperature radiation detectors. Using an ion microbeam, the charge collection efficiency of CZT detectors can be mapped with submicron resolution and maps of the electron mobility and lifetime can be calculated. The nuclear microprobe can be used not only for characterizing detectors but also with the use of Time Resolved IBICC (TRIBICC) and lateral IBICC/TRIBICC we can deduce information about the electron and hole mobility and lifetime profiles, and about the variation of electric field along the detectors' axes. The Sandia Nuclear Microprobe has been and is being used routinely to characterize CZT detectors and measure their electronic transport properties. In this paper we will present the results of these measurements for different detectors. Furthermore the damage effects caused by the probing beam will be discussed and a simple model will be presented to explain the characteristic charge collection efficiency pattern observed after high dose irradiation.

Paper Details

Date Published: 21 November 2000
PDF: 8 pages
Proc. SPIE 4141, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics II, (21 November 2000); doi: 10.1117/12.407579
Show Author Affiliations
Gyorgy Vizkelethy, Idaho State Univ. and Sandia National Labs. (United States)
Barney L. Doyle, Sandia National Labs. (United States)
David S. Walsh, Sandia National Labs. (United States)
Ralph B. James, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 4141:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics II
Ralph B. James; Richard C. Schirato, Editor(s)

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