Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
Non-Faraday rotation of the free induction decay of hydroxyl radical in terahertz region. / Chesnokov, E. N.; Kubarev, V. V.; Krasnoperov, L. N. et al.
Synchrotron and Free Electron Laser Radiation: Generation and Application, SFR 2020. ed. / Boris Knyazev; Nikolay Vinokurov. American Institute of Physics Inc., 2020. 030007 (AIP Conference Proceedings; Vol. 2299).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
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TY - GEN
T1 - Non-Faraday rotation of the free induction decay of hydroxyl radical in terahertz region
AU - Chesnokov, E. N.
AU - Kubarev, V. V.
AU - Krasnoperov, L. N.
AU - Koshlyakov, P. V.
N1 - Funding Information: This work was funded by the Russian Science Foundation, grant 19-73-20060. The experiments were done at the shared research center SSTRC on the basis of the Novosibirsk FEL complex at BINP SB RAS, using equipment supported by project RFMEFI62119X0022. Publisher Copyright: © 2020 American Institute of Physics Inc. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/11/17
Y1 - 2020/11/17
N2 - Effect of external longitudinal magnetic field on the optical Free Induction Decay (FID) from a free radical was observed for the first time. The experiments were performed on the rotational transition of hydroxyl radical OH (233/2(J=1) Å 233/2(J=0) at 83.8 cmí1) using the Terahertz Free Electron Laser. In contrast to the results of the experiments with a stable paramagnetic molecule NO, the observed effect of external magnetic field on the Free Induction Decay from hydroxyl radicals is more complicated. A longitudinal magnetic field leads to rotation of the polarization plane of the FID radiation, as well as to additional modulation of the signal intensity. The angle of rotation of the polarization plane is large, in agreement with the theoretical predictions. The observed FID kinetics in the time domain are in semi-quantitative agreement with the modeling. This observation opens an opportunity for selective detection by polarization discrimination of weak signals of short-lived reactive paramagnetic free radicals from overwhelming signals that originate from stable non-paramagnetic species.
AB - Effect of external longitudinal magnetic field on the optical Free Induction Decay (FID) from a free radical was observed for the first time. The experiments were performed on the rotational transition of hydroxyl radical OH (233/2(J=1) Å 233/2(J=0) at 83.8 cmí1) using the Terahertz Free Electron Laser. In contrast to the results of the experiments with a stable paramagnetic molecule NO, the observed effect of external magnetic field on the Free Induction Decay from hydroxyl radicals is more complicated. A longitudinal magnetic field leads to rotation of the polarization plane of the FID radiation, as well as to additional modulation of the signal intensity. The angle of rotation of the polarization plane is large, in agreement with the theoretical predictions. The observed FID kinetics in the time domain are in semi-quantitative agreement with the modeling. This observation opens an opportunity for selective detection by polarization discrimination of weak signals of short-lived reactive paramagnetic free radicals from overwhelming signals that originate from stable non-paramagnetic species.
UR - http://www.scopus.com/inward/record.url?scp=85096499552&partnerID=8YFLogxK
U2 - 10.1063/5.0030409
DO - 10.1063/5.0030409
M3 - Conference contribution
AN - SCOPUS:85096499552
T3 - AIP Conference Proceedings
BT - Synchrotron and Free Electron Laser Radiation
A2 - Knyazev, Boris
A2 - Vinokurov, Nikolay
PB - American Institute of Physics Inc.
T2 - 2020 Internetional Conference on Synchrotron and Free Electron Laser Radiation: Generation and Application, SFR 2020
Y2 - 13 July 2020 through 16 July 2020
ER -
ID: 26133237