High-resolution Schottky CdTe diode for hard X-ray and gamma-ray astronomy

Takahashi, Tadayuki; Paul, Biswajit; Hirose, Kazuyuki; Matsumoto, Chiho; Ohno, Ryoichi; Ozaki, Tsutomu; Mori, Kunishiro; Tomita, Y.

doi:10.1016/s0168-9002(99)00606-3

Cited by 139 publications

(54 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It shows an energy resolution of 6 keV FWHM at 511 keV (∆E/E = 1.2%) which is comparable to the values presented in [1,5,[11][12][13] for the same energy and similar conditions.…”

Section: Resultssupporting

confidence: 83%

Energy and coincidence time resolution measurements of CdTe detectors for PET

et al. 2013

View full text Add to dashboard Cite

We report on the characterization of 2 mm thick CdTe diode detector with Schottky contacts to be employed in a novel conceptual design of PET scanner. Results at -8 • C with an applied bias voltage of -1000 V/mm show a 1.2% FWHM energy resolution at 511 keV. Coincidence time resolution has been measured by triggering on the preamplifier output signal to improve the timing resolution of the detector. Results at the same bias and temperature conditions show a FWHM of 6 ns with a minimum acceptance energy of 500 keV.These results show that pixelated CdTe Schottky diode is an excellent candidate for the development of next generation nuclear medical imaging devices such as PET, Compton gamma cameras, and especially PET-MRI hybrid systems when used in a magnetic field immune configuration.

show abstract

“…It shows an energy resolution of 6 keV FWHM at 511 keV (∆E/E = 1.2%) which is comparable to the values presented in [1,5,[11][12][13] for the same energy and similar conditions.…”

Section: Resultssupporting

confidence: 83%

Energy and coincidence time resolution measurements of CdTe detectors for PET

et al. 2013

View full text Add to dashboard Cite

show abstract

“…By using = 4.5 eV and F = 0.15, the theoretical limit (FWHM) is 200 eV at 10 keV, 610 eV at 100 keV, and 1.5 keV at 600 keV [30], if we could neglect electronic noise. These resolutions are very attractive for applications in astrophysics, where precise determinations of the central energy and the profile of X-ray and γ-ray lines are crucial [24]. For obtaining the ultimate energy resolution from the CdTe and CdZnTe detectors, collecting full information given by the transit of both electrons and holes is important.…”

Section: Effects Of Low Transport Of Holesmentioning

confidence: 99%

“…The thin CdTe device has an advantage over the thick one because sufficient bias voltage for full charge collection can be easily applied. Detectors with very low leakage current that allow such a high bias voltage have been developed by several groups thorough the use of diode structure either by a blocking electrode or PIN structure [24], [25], [26].…”

Section: Effects Of Low Transport Of Holesmentioning

confidence: 99%

Recent progress in CdTe and CdZnTe detectors

Takahashi

Watanabe

2001

IEEE Trans. Nucl. Sci.

535

275

View full text Add to dashboard Cite

Cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) have been regarded as promising semiconductor materials for hard X-ray and γ-ray detection. The high atomic number of the materials (Z Cd =48, Z T e =52) gives a high quantum efficiency in comparison with Si. The large band-gap energy (Eg ∼ 1.5 eV) allows us to operate the detector at room temperature. However, a considerable amount of charge loss in these detectors produces a reduced energy resolution. This problem arises due to the low mobility and short lifetime of holes. Recently, significant improvements have been achieved to improve the spectral properties based on the advances in the production of crystals and in the design of electrodes. In this overview talk, we summarize (1) advantages and disadvantages of CdTe and CdZnTe semiconductor detectors and (2) technique for improving energy resolution and photopeak efficiencies. Applications of these imaging detectors in future hard X-ray and gamma-ray astronomy missions are briefly discussed.

show abstract

“…Therefore, a CdTe detector, which can measure a high resolution energy spectrum without a bulky cooling system for room temperature operation, was chosen for the XRF measurements [3][4][5][6]. The detector (XR-100T-CdTe) and accessories (PX4: Digital Pulse processor, MCA, and Power Supply) were obtained from AMPTEK.…”

Section: Semiconductor Detectormentioning

confidence: 99%