Lioliou, G;
Krysa, AB;
Barnett, AM;
(2021)
X-/-ray photon counting spectroscopy with an AlInP array.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
, 1002
, Article 165293. 10.1016/j.nima.2021.165293.
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Abstract
An AlInP 3 × 3 pixel monolithic array was fabricated from a p -i-n structure wafer (6 μm thick i layer) grown by metalorganic vapour phase epitaxy; each pixel (square mesa photodiode) had an area of 200 μm × 200 μm. The pixels were initially electrically characterized and were then subjected to illumination by X-ray and γ-ray photons of energies ≤88 keV while each of them was in turn coupled to a custom-made, low noise, charge-sensitive preamplifier. The photon counting X-/γ-ray spectroscopic performance of the pixels was investigated by obtaining and analysing Fe X-ray, Am X-/γ-ray, and Cd X-/γ-ray spectra; the energy resolution (Full Width at Half Maximum), when the array and preamplifier were operated at the maximum investigated temperature (100 °C), was 1.54 keV ± 0.08 keV at 5.9 keV, 1.58 keV ± 0.08 keV at 22.16 keV, and 1.57 keV ± 0.08 keV at 59.54 keV. This work sets the agenda for future development of an AlInP photon counting X-/γ-ray spectroscopic imager for uncooled operation in high temperature environments. + + 55 241 109
| Type: | Article |
|---|---|
| Title: | X-/-ray photon counting spectroscopy with an AlInP array |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.nima.2021.165293 |
| Publisher version: | https://doi.org/10.1016/j.nima.2021.165293 |
| Language: | English |
| Additional information: | © 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Science & Technology, Technology, Physical Sciences, Instruments & Instrumentation, Nuclear Science & Technology, Physics, Nuclear, Physics, Particles & Fields, Physics, AlInP, X-ray spectroscopy, gamma-ray spectroscopy, Pixel detector, Photodiode array, SILICON-CARBIDE, ENERGY RESOLUTION, NOISE, PREAMPLIFIER, PARAMETERS, DETECTORS, GROWTH, CDTE |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10144034 |
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