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

^*Corresponding author for this work

Waseda Research Institute for Science and Engineering

Research output: Contribution to journal › Article › peer-review

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

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

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10.1109/TNS.2002.1039654

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CdTe stacked detectors for gamma-ray detection. / Watanabe, Shin; Takahashi, Tadayuki; Okada, Yuu; Sato, Goro; Kouda, Manabu; Mitani, Takefumi; Kobayashi, Yoshihito; Nakazawa, Kazuhiro; Kuroda, Yoshikatsu; Onishi, Mitsunobu.

In: IEEE Transactions on Nuclear Science, Vol. 49 II, No. 3, 06.2002, p. 1292-1296.

Research output: Contribution to journal › Article › peer-review

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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",

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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.

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KW - Cadmium zinc telluride (CdZnTe)

KW - CdTe diode detector

KW - Stacked detector

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CdTe stacked detectors for gamma-ray detection

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Keywords

ASJC Scopus subject areas

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