AlGaAs diodes for X-ray spectroscopy.

Lees, J. E.; Bassford, D. J.; Ng, J. S.; Tan, C. H.; David, J. P. R.

AlGaAs paper 19 June 2008_JELees etal.pdf (194.11 kB)

AlGaAs diodes for X-ray spectroscopy.

journal contribution

posted on 2008-11-27, 12:34 authored by J. E. Lees, D. J. Bassford, J. S. Ng, C. H. Tan, J. P. R. David

Al0.8Ga0.2As p+-p--n+ diodes with low reverse leakage currents (<10nA) were evaluated as room temperature (23ºC), soft X-ray photon counting detectors. X-ray spectra from a 55Fe radioactive source show these diodes can be used for spectroscopy with promising energy resolution of 1.47 keV FWHM at 5.9 keV. At elevated reverse bias levels (>20V) we observed avalanche multiplication which, while improving the signal-to-noise ratio, degraded the spectroscopic performance.

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Citation

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2008, 594 (2), pp. 202-205.

Published in

Nuclear Instruments and Methods in Physics Research Section A: Accelerators

Publisher

Elsevier B.V.

issn

0168-9002

Copyright date

2008

Available date

2008-11-27

Publisher DOI

https://doi.org/10.1016/j.nima.2008.06.038

Publisher version

http://www.sciencedirect.com/science/article/pii/S0168900208008644

Language

en

Administrator link

https://leicester.figshare.com/account/articles/10082231

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Keywords

X-ray detection AlGaAs avalanche multiplication

AlGaAs diodes for X-ray spectroscopy.

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