A Low-Cost Digital Pulsed Coherent Spectrometer for Investigation of NQR in Layered Semiconductor GaSe and InSe Crystals
1
Department of Electronics and Information Technology, Lublin University of Technology, Nadbytrzycka 38D, 20-618 Lublin, Poland
2
Department of Radio Engineering and Information Security, Yuriy Fedkovych Chernivtsi National University, Kotsyubynsky 2, 58 000 Chernivtsi, Ukraine
*
Author to whom correspondence should be addressed.
Electronics 2020, 9(12), 1996; https://doi.org/10.3390/electronics9121996
Received: 21 October 2020 / Revised: 17 November 2020 / Accepted: 22 November 2020 / Published: 25 November 2020
(This article belongs to the Section Computer Science & Engineering)
A low-cost digital pulsed nuclear quadrupole resonance (NQR) radio-spectrometer is proposed, all main modules of digital processing and synthesis of which on the field-programmable gate array (FPGA) are implemented. The input sensitivity of the device is of the order of 3 μV to 5 μV which allows conducting NQR studies in samples of relatively small dimensions. The application of the developed methods of NQR pulsed radio spectroscopy made it possible to increase spectral resolution, improve spectral shape and significantly reduce the time of research. In the case of studying InSe and GaSe crystals, spectra with signal-to-noise ratio (SNR) values of 41.9 dB were observed in samples with a volume of 0.1 cm3. As the results of the research have shown, the characteristics of the proposed spectrometer make it effective when used to observe free induction decay (FID) signals of a significant number of isotopes of elements with quadrupolar nuclei.
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Keywords:
nuclear quadrupole resonance; gated preamplifier; FPGA; carrier suppression; semiconductor; InSe; GaSe
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MDPI and ACS Style
Hotra, O.; Samila, A. A Low-Cost Digital Pulsed Coherent Spectrometer for Investigation of NQR in Layered Semiconductor GaSe and InSe Crystals. Electronics 2020, 9, 1996.
AMA Style
Hotra O, Samila A. A Low-Cost Digital Pulsed Coherent Spectrometer for Investigation of NQR in Layered Semiconductor GaSe and InSe Crystals. Electronics. 2020; 9(12):1996.
Chicago/Turabian StyleHotra, Oleksandra; Samila, Andriy. 2020. "A Low-Cost Digital Pulsed Coherent Spectrometer for Investigation of NQR in Layered Semiconductor GaSe and InSe Crystals" Electronics 9, no. 12: 1996.
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