CdTe stacked detectors for gamma-ray detection

Author

Watanabe, Shin ; Takahashi, Tadayuki ; Okada, Yuu ; Sato, Goro ; Kouda, Manabu ; Mitani, Takefumi ; Kobavashi, Y. ; Nakazawa, Kazuhiro ; Kuroda, Yoshikatsu ; Onishi, Mitsunobu

Author_Institution

Inst. of Space & Astron. Sci., Kanagawa, Japan

Volume

4

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

2434

Lastpage

2438

Abstract

We describe a stacked detector made of thin CdTe diode detectors. By using a thin CdTe device, we can overcome the charge loss problem due to the small mobility and short lifetime of holes in CdTe or CdZnTe detectors. However, a CdTe detector with a thickness of more than 5 mm is needed for adequate detection efficiency for gamma-rays of several hundred keV. Good energy resolution and good peak detection efficiency are difficult to obtain using such a thick CdTe detector. The stacked detector enabled us to realize a detector with both high energy resolution (~1%) and good efficiencies for gamma-rays up to several hundred keV. In this paper, we report the advantage of CdTe thin detectors and the performance of CdTe stacked detectors made of ten layers of a 0.5 mm thick CdTe diode detectors with a surface area of 21.5 mm×21.5 mm

Keywords

cadmium compounds; gamma-ray detection; semiconductor counters; 0.5 mm; 21.5 mm; CdTe; detection efficiency; diode detectors; energy resolution; gamma-ray detection; peak detection efficiency; semiconductor counter; stacked detectors; Cadmium compounds; Charge carriers; Degradation; Energy resolution; Envelope detectors; Gamma ray detection; Gamma ray detectors; Physics; Semiconductor materials; Zinc;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2001 IEEE

Conference_Location

San Diego, CA

ISSN

1082-3654

Print_ISBN

0-7803-7324-3

Type

conf

DOI

10.1109/NSSMIC.2001.1009311

Filename

1009311