Hard X-ray response of CdZnTe detectors in the Swift burst alert telescope

Masaya Suzuki, Makoto Tashiro, Goro Sato, Shin Watanabe, Kazuhiro Nakazawa, Tadayuki Takahashi, Yuu Okada, Hiromitsu Takahashi, Ann Parsons, Scott Barthelmy, Jay Cummings, Neil Gehrels, Derek Hullinger, Hans Krimm, Jack Tueller

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The Burst Alert Telescope (BAT) onboard the Swift gamma-ray burst explorer has a coded aperture mask and a detector array of 32 K CdZnTe semiconductor devices. Due to the small mobility and short lifetime of carriers, the electron-hole pairs generated by gamma-ray irradiation cannot be fully collected. Hence the shape of the measured spectra has a broad low-energy tail. We have developed a method to model the spectral response by taking into account the charge transport properties which depend on the depth of the photon interaction [1]. The mobility-lifetime products for detectors derived from our method vary by more than one order of magnitude among detectors. In this paper, we focus on the nonuniformity of the mobility at the millimeter scale by employing a scanning experiment for a single detector. We reveal almost an order of magnitude variance in the mobility-lifetime product of holes within a single detector, while those of electrons remains fairly uniform.

Original languageEnglish
Pages (from-to)1033-1035
Number of pages3
JournalIEEE Transactions on Nuclear Science
Volume52
Issue number4
DOIs
Publication statusPublished - 2005 Aug

Fingerprint

Telescopes
bursts
telescopes
Detectors
X rays
detectors
x rays
Gamma rays
life (durability)
Electrons
Semiconductor devices
products
spectral sensitivity
semiconductor devices
gamma ray bursts
nonuniformity
Transport properties
Charge transfer
Masks
masks

Keywords

  • BAT
  • CdZnTe
  • Energy calibration
  • Gamma-ray detector
  • Mobility-lifetime products
  • Spectral modeling
  • Swift

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Nuclear Energy and Engineering

Cite this

Suzuki, M., Tashiro, M., Sato, G., Watanabe, S., Nakazawa, K., Takahashi, T., ... Tueller, J. (2005). Hard X-ray response of CdZnTe detectors in the Swift burst alert telescope. IEEE Transactions on Nuclear Science, 52(4), 1033-1035. https://doi.org/10.1109/TNS.2005.852968

Hard X-ray response of CdZnTe detectors in the Swift burst alert telescope. / Suzuki, Masaya; Tashiro, Makoto; Sato, Goro; Watanabe, Shin; Nakazawa, Kazuhiro; Takahashi, Tadayuki; Okada, Yuu; Takahashi, Hiromitsu; Parsons, Ann; Barthelmy, Scott; Cummings, Jay; Gehrels, Neil; Hullinger, Derek; Krimm, Hans; Tueller, Jack.

In: IEEE Transactions on Nuclear Science, Vol. 52, No. 4, 08.2005, p. 1033-1035.

Research output: Contribution to journalArticle

Suzuki, M, Tashiro, M, Sato, G, Watanabe, S, Nakazawa, K, Takahashi, T, Okada, Y, Takahashi, H, Parsons, A, Barthelmy, S, Cummings, J, Gehrels, N, Hullinger, D, Krimm, H & Tueller, J 2005, 'Hard X-ray response of CdZnTe detectors in the Swift burst alert telescope', IEEE Transactions on Nuclear Science, vol. 52, no. 4, pp. 1033-1035. https://doi.org/10.1109/TNS.2005.852968
Suzuki M, Tashiro M, Sato G, Watanabe S, Nakazawa K, Takahashi T et al. Hard X-ray response of CdZnTe detectors in the Swift burst alert telescope. IEEE Transactions on Nuclear Science. 2005 Aug;52(4):1033-1035. https://doi.org/10.1109/TNS.2005.852968
Suzuki, Masaya ; Tashiro, Makoto ; Sato, Goro ; Watanabe, Shin ; Nakazawa, Kazuhiro ; Takahashi, Tadayuki ; Okada, Yuu ; Takahashi, Hiromitsu ; Parsons, Ann ; Barthelmy, Scott ; Cummings, Jay ; Gehrels, Neil ; Hullinger, Derek ; Krimm, Hans ; Tueller, Jack. / Hard X-ray response of CdZnTe detectors in the Swift burst alert telescope. In: IEEE Transactions on Nuclear Science. 2005 ; Vol. 52, No. 4. pp. 1033-1035.
@article{752e0da62df84f8bb88408ec65db2388,
title = "Hard X-ray response of CdZnTe detectors in the Swift burst alert telescope",
abstract = "The Burst Alert Telescope (BAT) onboard the Swift gamma-ray burst explorer has a coded aperture mask and a detector array of 32 K CdZnTe semiconductor devices. Due to the small mobility and short lifetime of carriers, the electron-hole pairs generated by gamma-ray irradiation cannot be fully collected. Hence the shape of the measured spectra has a broad low-energy tail. We have developed a method to model the spectral response by taking into account the charge transport properties which depend on the depth of the photon interaction [1]. The mobility-lifetime products for detectors derived from our method vary by more than one order of magnitude among detectors. In this paper, we focus on the nonuniformity of the mobility at the millimeter scale by employing a scanning experiment for a single detector. We reveal almost an order of magnitude variance in the mobility-lifetime product of holes within a single detector, while those of electrons remains fairly uniform.",
keywords = "BAT, CdZnTe, Energy calibration, Gamma-ray detector, Mobility-lifetime products, Spectral modeling, Swift",
author = "Masaya Suzuki and Makoto Tashiro and Goro Sato and Shin Watanabe and Kazuhiro Nakazawa and Tadayuki Takahashi and Yuu Okada and Hiromitsu Takahashi and Ann Parsons and Scott Barthelmy and Jay Cummings and Neil Gehrels and Derek Hullinger and Hans Krimm and Jack Tueller",
year = "2005",
month = "8",
doi = "10.1109/TNS.2005.852968",
language = "English",
volume = "52",
pages = "1033--1035",
journal = "IEEE Transactions on Nuclear Science",
issn = "0018-9499",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "4",

}

TY - JOUR

T1 - Hard X-ray response of CdZnTe detectors in the Swift burst alert telescope

AU - Suzuki, Masaya

AU - Tashiro, Makoto

AU - Sato, Goro

AU - Watanabe, Shin

AU - Nakazawa, Kazuhiro

AU - Takahashi, Tadayuki

AU - Okada, Yuu

AU - Takahashi, Hiromitsu

AU - Parsons, Ann

AU - Barthelmy, Scott

AU - Cummings, Jay

AU - Gehrels, Neil

AU - Hullinger, Derek

AU - Krimm, Hans

AU - Tueller, Jack

PY - 2005/8

Y1 - 2005/8

N2 - The Burst Alert Telescope (BAT) onboard the Swift gamma-ray burst explorer has a coded aperture mask and a detector array of 32 K CdZnTe semiconductor devices. Due to the small mobility and short lifetime of carriers, the electron-hole pairs generated by gamma-ray irradiation cannot be fully collected. Hence the shape of the measured spectra has a broad low-energy tail. We have developed a method to model the spectral response by taking into account the charge transport properties which depend on the depth of the photon interaction [1]. The mobility-lifetime products for detectors derived from our method vary by more than one order of magnitude among detectors. In this paper, we focus on the nonuniformity of the mobility at the millimeter scale by employing a scanning experiment for a single detector. We reveal almost an order of magnitude variance in the mobility-lifetime product of holes within a single detector, while those of electrons remains fairly uniform.

AB - The Burst Alert Telescope (BAT) onboard the Swift gamma-ray burst explorer has a coded aperture mask and a detector array of 32 K CdZnTe semiconductor devices. Due to the small mobility and short lifetime of carriers, the electron-hole pairs generated by gamma-ray irradiation cannot be fully collected. Hence the shape of the measured spectra has a broad low-energy tail. We have developed a method to model the spectral response by taking into account the charge transport properties which depend on the depth of the photon interaction [1]. The mobility-lifetime products for detectors derived from our method vary by more than one order of magnitude among detectors. In this paper, we focus on the nonuniformity of the mobility at the millimeter scale by employing a scanning experiment for a single detector. We reveal almost an order of magnitude variance in the mobility-lifetime product of holes within a single detector, while those of electrons remains fairly uniform.

KW - BAT

KW - CdZnTe

KW - Energy calibration

KW - Gamma-ray detector

KW - Mobility-lifetime products

KW - Spectral modeling

KW - Swift

UR - http://www.scopus.com/inward/record.url?scp=27644555260&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27644555260&partnerID=8YFLogxK

U2 - 10.1109/TNS.2005.852968

DO - 10.1109/TNS.2005.852968

M3 - Article

AN - SCOPUS:27644555260

VL - 52

SP - 1033

EP - 1035

JO - IEEE Transactions on Nuclear Science

JF - IEEE Transactions on Nuclear Science

SN - 0018-9499

IS - 4

ER -