X-ray detector with thick epitaxial GaAs grown by chemical reaction

Sun, G.C.; Lenoir, Marion; Bréelle, É.; Samic, H.; Bourgoin, J. C.; El-Abbassi, H.; Sellin, P.J.; Montagne, J P

doi:10.1109/tns.2003.815349

Cited by 13 publications

(5 citation statements)

References 14 publications

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“…Its material properties are advantageous in that GaAs offers more efficient absorption than Si, while offering lower leakage currents than Ge, whose energy gap is much narrower. Several research groups have also demonstrated GaAs detector arrays for X-ray photons [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

GaAs/Al_0.8Ga_0.2As avalanche photodiodes for soft X-ray spectroscopy

et al. 2014

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The soft X-ray spectroscopic performance of a GaAs/Al 0.8 Ga 0.2 As Separate Absorption and Multiplication (SAM) APD was assessed at room temperature using a 55 Fe source. An energy resolution of 1.08 keV (FWHM) was achieved for the 5.9 keV X-rays, at an avalanche gain of 3.5. The avalanche gain also improved the minimum detectable energy from 4.8 keV at unity gain to about 1.5 keV at a gain of 5. Through avalanche statistics analyses, we confirmed that (i) the APD's FWHM was degraded by X-ray photon absorption within the avalanche region, and (ii) photon absorption in/near the n-cladding layer contributed to an undesirable secondary peak in the spectrum.

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Section: Introductionmentioning

confidence: 99%

GaAs/Al_0.8Ga_0.2As avalanche photodiodes for soft X-ray spectroscopy

et al. 2014

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“…The GaAs material itself is characterized by a low yield and low energy fluorescence, allowing to reach large contrast and high spatial resolution [3]. Moreover, a standard GaAs technology exists for making pixel arrays and the epitaxial technique used for the growth is low cost and non-polluting [4,5].…”

Section: Introductionmentioning

confidence: 99%

Mobility-lifetime product in epitaxial GaAs X-ray detectors

Sun

Zazoui

Talbi

et al. 2007

Nuclear Instruments and Methods in Physics Research Section A:

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“…The review year again saw little activity in the area of compound semiconductor ED detectors with the exception of a paper describing a chemical method for the growth of detector grade gallium arsenide 21 and a report on radiation hardness of CdTe X-ray and gamma ray detectors destined for use in low Earth orbit astrophysics experiments. 22 Interest in pixellated X-ray detectors remained evident during the review period although the types and applications of these detectors tended to be more exotic than just analytical XRF spectrometry.…”

Section: Detectorsmentioning

confidence: 99%

“…In another contribution, Ide-Ektessabi et al 109 used microbeam SR XRF and XANES spectroscopy to investigate the distribution and chemical state of Fe in Parkinsonian susbstantia nigra. The authors concluded that cells with a high content of iron also had high levels of Fe 21 , which, it has been suggested, have a higher potential than Fe 31 to create free radicals that lead to cell death. Szczerbowska-Boruchowska et al 110 studied the still unknown pathogenesis of Parkinson's disease and amyotrophic lateral sclerosis (ALS) and measured selected parts of the human brain and spinal cord.…”

Section: Medical Applicationsmentioning

confidence: 99%