posted on 2023-06-09, 23:35authored byGrammatiki Lioliou, A B Krysa, A M Barnett
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 and?-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-/?-ray spectroscopic performance of the pixels wasinvestigated by obtaining and analysing55Fe X-ray,241Am X-/?-ray, and109Cd X-/?-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-/?-ray spectroscopic imager for uncooled operation in high temperature environments.
Funding
Photon counting X-ray and gamma-ray spectroscopy with Al0.52In0.48P detectors; G2140; EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCIL; EP/P021271/1
Novel X-ray/[gamma]-ray Detectors; G2260; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/R001804/1
Radioisotope Microbatteries; G1951; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/P001815/1
Philip Leverhulme Prize - Engineering; G2055; LEVERHULME TRUST; PLP-2016-285
History
Publication status
Published
File Version
Published version
Journal
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment