Improvement of the spectral response in large CdTe detectors operating at low bias voltage

Hiroshi Nishizawa, Hiroshi Inujima, Kazuo Takashima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper reports a method to improve the energy resolution for γ rays of a CdTe semiconductor detector 15 × 15 × 15 mm3 in size and with low applied voltage and an ad- equate electronic circuit constant. The principle of improvement is to make use of carrier trapping and ballistic defects. We investigated the improvement of the energy resolution by calculating the output waveforms using a Monte Carlo simulation. As a result, we could obtain an approximately 8% energy resolution of 662 keV equivalent to that of an NaI(Tl) scintillator. Further, the intrinsic efficiency of a full energy peak equivalent to that of a 1-in-thick cylindrical NaI(Tl) scintillator could be achieved. This method has the advantages that the energy spectra can be improved by simple systems and the noise is reduced because of the low leakage current due to the low applied voltage.

Original languageEnglish
Pages (from-to)2025-2031
Number of pages7
JournalIEEE Transactions on Nuclear Science
Volume49 II
Issue number4
DOIs
Publication statusPublished - 2002 Aug

Fingerprint

Bias voltage
spectral sensitivity
Phosphors
Detectors
Semiconductor detectors
detectors
Electric potential
electric potential
Ballistics
Leakage currents
low voltage
scintillation counters
Defects
energy
Networks (circuits)
ballistics
rays
waveforms
energy spectra
leakage

Keywords

  • γ ray
  • Ballistic defects
  • Carrier trapping
  • CdTe
  • Energy spectra
  • Monte Carlo simulation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Nuclear Energy and Engineering

Cite this

Improvement of the spectral response in large CdTe detectors operating at low bias voltage. / Nishizawa, Hiroshi; Inujima, Hiroshi; Takashima, Kazuo.

In: IEEE Transactions on Nuclear Science, Vol. 49 II, No. 4, 08.2002, p. 2025-2031.

Research output: Contribution to journalArticle

@article{c5f9368250d443b4a7d145ac53ef55a6,
title = "Improvement of the spectral response in large CdTe detectors operating at low bias voltage",
abstract = "This paper reports a method to improve the energy resolution for γ rays of a CdTe semiconductor detector 15 × 15 × 15 mm3 in size and with low applied voltage and an ad- equate electronic circuit constant. The principle of improvement is to make use of carrier trapping and ballistic defects. We investigated the improvement of the energy resolution by calculating the output waveforms using a Monte Carlo simulation. As a result, we could obtain an approximately 8{\%} energy resolution of 662 keV equivalent to that of an NaI(Tl) scintillator. Further, the intrinsic efficiency of a full energy peak equivalent to that of a 1-in-thick cylindrical NaI(Tl) scintillator could be achieved. This method has the advantages that the energy spectra can be improved by simple systems and the noise is reduced because of the low leakage current due to the low applied voltage.",
keywords = "γ ray, Ballistic defects, Carrier trapping, CdTe, Energy spectra, Monte Carlo simulation",
author = "Hiroshi Nishizawa and Hiroshi Inujima and Kazuo Takashima",
year = "2002",
month = "8",
doi = "10.1109/TNS.2002.801715",
language = "English",
volume = "49 II",
pages = "2025--2031",
journal = "IEEE Transactions on Nuclear Science",
issn = "0018-9499",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "4",

}

TY - JOUR

T1 - Improvement of the spectral response in large CdTe detectors operating at low bias voltage

AU - Nishizawa, Hiroshi

AU - Inujima, Hiroshi

AU - Takashima, Kazuo

PY - 2002/8

Y1 - 2002/8

N2 - This paper reports a method to improve the energy resolution for γ rays of a CdTe semiconductor detector 15 × 15 × 15 mm3 in size and with low applied voltage and an ad- equate electronic circuit constant. The principle of improvement is to make use of carrier trapping and ballistic defects. We investigated the improvement of the energy resolution by calculating the output waveforms using a Monte Carlo simulation. As a result, we could obtain an approximately 8% energy resolution of 662 keV equivalent to that of an NaI(Tl) scintillator. Further, the intrinsic efficiency of a full energy peak equivalent to that of a 1-in-thick cylindrical NaI(Tl) scintillator could be achieved. This method has the advantages that the energy spectra can be improved by simple systems and the noise is reduced because of the low leakage current due to the low applied voltage.

AB - This paper reports a method to improve the energy resolution for γ rays of a CdTe semiconductor detector 15 × 15 × 15 mm3 in size and with low applied voltage and an ad- equate electronic circuit constant. The principle of improvement is to make use of carrier trapping and ballistic defects. We investigated the improvement of the energy resolution by calculating the output waveforms using a Monte Carlo simulation. As a result, we could obtain an approximately 8% energy resolution of 662 keV equivalent to that of an NaI(Tl) scintillator. Further, the intrinsic efficiency of a full energy peak equivalent to that of a 1-in-thick cylindrical NaI(Tl) scintillator could be achieved. This method has the advantages that the energy spectra can be improved by simple systems and the noise is reduced because of the low leakage current due to the low applied voltage.

KW - γ ray

KW - Ballistic defects

KW - Carrier trapping

KW - CdTe

KW - Energy spectra

KW - Monte Carlo simulation

UR - http://www.scopus.com/inward/record.url?scp=0036702944&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036702944&partnerID=8YFLogxK

U2 - 10.1109/TNS.2002.801715

DO - 10.1109/TNS.2002.801715

M3 - Article

VL - 49 II

SP - 2025

EP - 2031

JO - IEEE Transactions on Nuclear Science

JF - IEEE Transactions on Nuclear Science

SN - 0018-9499

IS - 4

ER -