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Proceedings Paper

Measurement of non-radiative gas molecules relaxation rates by using quartz-enhanced photoacoustic spectroscopy
Author(s): S. Dello Russo; P. Patimisco; A. Sampaolo; M. Giglio; G. Menduni; A. Elefante; V. Passaro; F. K. Tittel; V. Spagnolo
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Paper Abstract

In this work, we report on the measurement of methane (CH4) effective non-radiative relaxation rate in a mixture containing 1% of CH4 and 0.15% of water vapor in nitrogen, by using a set of custom quartz tuning forks (QTFs). The dependence of quartz-enhanced photoacoustic spectroscopy (QEPAS) peak signal and QTF quality factor as a function of operating pressure allowed the estimation of the radiation-to-sound conversion efficiency and, consequently, the calculation of the effective relaxation rate of the investigated gas mixture. We measured an effective relaxation rate of 3.2 ms·Torr, in good agreement with values reported in literature.

Paper Details

Date Published: 31 January 2020
PDF: 7 pages
Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 112882C (31 January 2020); doi: 10.1117/12.2545774
Show Author Affiliations
S. Dello Russo, Univ. and Politecnico of Bari, CNR-IFN (Italy)
P. Patimisco, Univ. and Politecnico of Bari, CNR-IFN (Italy)
A. Sampaolo, Univ. and Politecnico of Bari, CNR-IFN (Italy)
M. Giglio, Univ. and Politecnico of Bari, CNR-IFN (Italy)
G. Menduni, Univ. and Politecnico of Bari, CNR-IFN (Italy)
Politecnico di Bari (Italy)
A. Elefante, Univ. and Politecnico of Bari, CNR-IFN (Italy)
V. Passaro, Politecnico di Bari (Italy)
F. K. Tittel, Rice Univ. (United States)
V. Spagnolo, Univ. and Politecnico of Bari, CNR-IFN (Italy)


Published in SPIE Proceedings Vol. 11288:
Quantum Sensing and Nano Electronics and Photonics XVII
Manijeh Razeghi; Jay S. Lewis; Giti A. Khodaparast; Pedram Khalili, Editor(s)

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