Chapter 15 Summary and Remaining Issues for Room Temperature Radiation Spectrometers
1995; Elsevier BV; Linguagem: Inglês
10.1016/s0080-8784(08)62754-4
ISSN0080-8784
AutoresM. Schieber, R. B. James, T. E. Schlesinger,
Tópico(s)Advanced X-ray and CT Imaging
ResumoAn intense research and development effort in wide bandgap (E g ) semiconductors has been motivated by the need for lightweight, handheld, portable nuclear radiation spectrometer systems capable of operating at room temperature. This chapter reviews the materials requirements and the state of the art, particularly in HgI 2 and cadmium–tellurium (CdTe). The chapter discusses the comparison with the technology of other materials such as Cd 1- x Zn x Te with x = 0.10 to 0.20. It considers the technological steps required to produce HgI 2 detectors and examines the types of defects each step introduces in the material. The chapter summarizes the remaining problems facing the HgI 2 detectors. The analogous issues for CdTe and other candidate materials and present the technological problems associated with these materials are also considered. The chapter discusses the Purification precursor and growth of Cdte and Cd, Zn, and Te.
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