X-/γ-ray photon counting spectroscopy with an AlInP array

Lioliou, G, Krysa, A B and Barnett, A M (2021) X-/γ-ray photon counting spectroscopy with an AlInP array. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 1002. a165293 1-13. ISSN 0168-9002

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Abstract

An AlInP 3×3 pixel monolithic array was fabricated from a p+-i-n+structure wafer (6μm thick i layer)grown by metalorganic vapour phase epitaxy; each pixel (square mesa photodiode) had an area of 200μm×200μm. The pixels were initially electrically characterized and were then subjected to illumination byX-ray andγ-ray photons of energies≤88 keV while each of them was in turn coupled to a custom-made, lownoise, charge-sensitive preamplifier. The photon counting X-/γ-ray spectroscopic performance of the pixels wasinvestigated by obtaining and analysing55Fe X-ray,241Am X-/γ-ray, and109Cd X-/γ-ray spectra; the energyresolution (Full Width at Half Maximum), when the array and preamplifier were operated at the maximuminvestigated 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 photoncounting X-/γ-ray spectroscopic imager for uncooled operation in high temperature environments.

Item Type: Article
Keywords: AlInP, X-ray spectroscopy, γ-ray spectroscopy, Pixel detector, Photodiode array
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 14 Apr 2021 06:58
Last Modified: 14 Apr 2021 07:00
URI: http://sro.sussex.ac.uk/id/eprint/98425

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