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Development of new CdZnTe detectors for room-temperature high-flux radiation measurements
- Source :
- Journal of synchrotron radiation (Online) 24 (2017): 429–438. doi:10.1107/S1600577517000194, info:cnr-pdr/source/autori:Abbene L.; Gerardi G.; Raso G.; Principato F.; Zambelli N.; Benassi G.; Bettelli M.; Zappettini A./titolo:Development of new CdZnTe detectors for room-temperature high-flux radiation measurements/doi:10.1107%2FS1600577517000194/rivista:Journal of synchrotron radiation (Online)/anno:2017/pagina_da:429/pagina_a:438/intervallo_pagine:429–438/volume:24
- Publication Year :
- 2017
- Publisher :
- International Union of Crystallography, 2017.
-
Abstract
- Recently, CdZnTe (CZT) detectors have been widely proposed and developed for room-temperature X-ray spectroscopy even at high fluxes, and great efforts have been made on both the device and the crystal growth technologies. In this work, the performance of new travelling-heater-method (THM)-grown CZT detectors, recently developed at IMEM-CNR Parma, Italy, is presented. Thick planar detectors (3 mm thick) with gold electroless contacts were realised, with a planar cathode covering the detector surface (4.1 mm × 4.1 mm) and a central anode (2 mm × 2 mm) surrounded by a guard-ring electrode. The detectors, characterized by low leakage currents at room temperature (4.7 nA cm−2 at 1000 V cm−1), allow good room-temperature operation even at high bias voltages (>7000 V cm−1). At low rates (200 counts s−1), the detectors exhibit an energy resolution around 4% FWHM at 59.5 keV (241Am source) up to 2200 V, by using commercial front-end electronics (A250F/NF charge-sensitive preamplifier, Amptek, USA; nominal equivalent noise charge of 100 electrons RMS). At high rates (1 Mcounts s−1), the detectors, coupled to a custom-designed digital pulse processing electronics developed at DiFC of University of Palermo (Italy), show low spectroscopic degradations: energy resolution values of 8% and 9.7% FWHM at 59.5 keV (241Am source) were measured, with throughputs of 0.4% and 60% at 1 Mcounts s−1, respectively. An energy resolution of 7.7% FWHM at 122.1 keV (57Co source) with a throughput of 50% was obtained at 550 kcounts s−1 (energy resolution of 3.2% at low rate). These activities are in the framework of an Italian research project on the development of energy-resolved photon-counting systems for high-flux energy-resolved X-ray imaging.
- Subjects :
- Nuclear and High Energy Physics
Preamplifier
02 engineering and technology
digital pulse shape analysi
Radiation
01 natural sciences
law.invention
Planar
Optics
travelling heater method
law
0103 physical sciences
high flux
Instrumentation
energy-resolved photon-counting detectors
Nuclear and High Energy Physic
Physics
digital pulse shape analysis
010308 nuclear & particles physics
business.industry
CdZnTe detectors
CdZnTe detector
Detector
Settore FIS/01 - Fisica Sperimentale
X-ray and γ-ray detector
energy-resolved photon-counting detector
021001 nanoscience & nanotechnology
Cathode
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
Anode
gold electroless contact
Full width at half maximum
X-ray and -ray detectors
0210 nano-technology
business
Voltage
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Journal of synchrotron radiation (Online) 24 (2017): 429–438. doi:10.1107/S1600577517000194, info:cnr-pdr/source/autori:Abbene L.; Gerardi G.; Raso G.; Principato F.; Zambelli N.; Benassi G.; Bettelli M.; Zappettini A./titolo:Development of new CdZnTe detectors for room-temperature high-flux radiation measurements/doi:10.1107%2FS1600577517000194/rivista:Journal of synchrotron radiation (Online)/anno:2017/pagina_da:429/pagina_a:438/intervallo_pagine:429–438/volume:24
- Accession number :
- edsair.doi.dedup.....8cc9e3284a38cf3518b654e86901707d
- Full Text :
- https://doi.org/10.1107/S1600577517000194