CdTe stacked detectors for gamma-ray detection

Shin Watanabe; Tadayuki Takahashi; Yuu Okada; Goro Sato; Manabu Kouda; Takefumi Mitani; Yoshihito Kobayashi; Kazuhiro Nakazawa; Yoshikatsu Kuroda; Mitsunobu Onishi

doi:10.1109/TNS.2002.1039654

CdTe stacked detectors for gamma-ray detection

Shin Watanabe, Tadayuki Takahashi, Yuu Okada, Goro Sato, Manabu Kouda, Takefumi Mitani, Yoshihito Kobayashi, Kazuhiro Nakazawa, Yoshikatsu Kuroda, Mitsunobu Onishi

Waseda Research Institute for Science and Engineering

Research output: Contribution to journal › Article

30 Citations (Scopus)

Abstract

We describe a stacked detector made of thin cadmium telluride (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 cadmium zinc telluride (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 and good efficiencies for gamma rays up to several hundred keV. In order to verify this concept, we constructed a prototype made of ten layers of a 0.5-mm-thick CdTe diode detectors with a surface area of 21.5 mm × 21.5 mm. With this, we have achieved 5.3-keV and 7.9-keV energy resolution [full width at half maximum (FWHM)] at 356 keV and 662 keV, respectively, at the temperature of -20°C.

Original language	English
Pages (from-to)	1292-1296
Number of pages	5
Journal	IEEE Transactions on Nuclear Science
Volume	49 II
Issue number	3
DOIs	https://doi.org/10.1109/TNS.2002.1039654
Publication status	Published - 2002 Jun

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Keywords

Cadmium telluride (CdTe)
Cadmium zinc telluride (CdZnTe)
CdTe diode detector
Stacked detector

ASJC Scopus subject areas

Electrical and Electronic Engineering
Nuclear Energy and Engineering

Cite this

Watanabe, S., Takahashi, T., Okada, Y., Sato, G., Kouda, M., Mitani, T., Kobayashi, Y., Nakazawa, K., Kuroda, Y., & Onishi, M. (2002). CdTe stacked detectors for gamma-ray detection. IEEE Transactions on Nuclear Science, 49 II(3), 1292-1296. https://doi.org/10.1109/TNS.2002.1039654

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abstract = "We describe a stacked detector made of thin cadmium telluride (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 cadmium zinc telluride (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 and good efficiencies for gamma rays up to several hundred keV. In order to verify this concept, we constructed a prototype made of ten layers of a 0.5-mm-thick CdTe diode detectors with a surface area of 21.5 mm × 21.5 mm. With this, we have achieved 5.3-keV and 7.9-keV energy resolution [full width at half maximum (FWHM)] at 356 keV and 662 keV, respectively, at the temperature of -20°C.",

keywords = "Cadmium telluride (CdTe), Cadmium zinc telluride (CdZnTe), CdTe diode detector, Stacked detector",

author = "Shin Watanabe and Tadayuki Takahashi and Yuu Okada and Goro Sato and Manabu Kouda and Takefumi Mitani and Yoshihito Kobayashi and Kazuhiro Nakazawa and Yoshikatsu Kuroda and Mitsunobu Onishi",

year = "2002",

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T1 - CdTe stacked detectors for gamma-ray detection

AU - Watanabe, Shin

AU - Takahashi, Tadayuki

AU - Okada, Yuu

AU - Sato, Goro

AU - Kouda, Manabu

AU - Mitani, Takefumi

AU - Kobayashi, Yoshihito

AU - Nakazawa, Kazuhiro

AU - Kuroda, Yoshikatsu

AU - Onishi, Mitsunobu

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N2 - We describe a stacked detector made of thin cadmium telluride (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 cadmium zinc telluride (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 and good efficiencies for gamma rays up to several hundred keV. In order to verify this concept, we constructed a prototype made of ten layers of a 0.5-mm-thick CdTe diode detectors with a surface area of 21.5 mm × 21.5 mm. With this, we have achieved 5.3-keV and 7.9-keV energy resolution [full width at half maximum (FWHM)] at 356 keV and 662 keV, respectively, at the temperature of -20°C.

AB - We describe a stacked detector made of thin cadmium telluride (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 cadmium zinc telluride (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 and good efficiencies for gamma rays up to several hundred keV. In order to verify this concept, we constructed a prototype made of ten layers of a 0.5-mm-thick CdTe diode detectors with a surface area of 21.5 mm × 21.5 mm. With this, we have achieved 5.3-keV and 7.9-keV energy resolution [full width at half maximum (FWHM)] at 356 keV and 662 keV, respectively, at the temperature of -20°C.

KW - Cadmium telluride (CdTe)

KW - Cadmium zinc telluride (CdZnTe)

KW - CdTe diode detector

KW - Stacked detector

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Access to Document

10.1109/TNS.2002.1039654