E. N. Chesnokov, L. N. Krasnoperov, V. V. Kubarev, P. V. Koshlyakov, “Observation of free induction decay signals of OH radicals excited by terahertz free-electron laser pulses”, Fizika Goreniya i Vzryva, 2019, Volume 55, Issue 1,Pages <nobr>21

This article is cited in 12 papers

Observation of free induction decay signals of OH radicals excited by terahertz free-electron laser pulses

E. N. Chesnokov^a, L. N. Krasnoperov^b, V. V. Kubarev^c, P. V. Koshlyakov^a

^a Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
^b Technological University of New Jersey, 07102, Newark, USA
^c Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

Abstract: The first experimental observation of optical free induction signals of free radicals is reported. The signals were observed on the line of the rotational transition of the OH radical in the terahertz region. OH radicals were generated in the chemical reaction of excited oxygen atoms with water molecules. Radicals were excited by free-electron laser radiation pulses. Free induction radiation was detected in real time using ultra fast terahertz radiation detectors. The possibility of using optical free induction signals of radicals as a new method for detection of free radicals in combustion processes is discussed.

Keywords: OH radical, free induction, terahertz radiation.

UDC: 542.5

Received: 05.11.2017

DOI: 10.15372/FGV20190102