Investigation of the dynamics of the Belousov—Zhabotinsky reaction by time-resolved X-ray absorption spectroscopy using adaptive X-ray optical elements

A.I. Protsenko^†^a, b, I.A. Eliovich^‡^a, b, A.E. Blagov^§^a, b, Yu.V. Pisarevsky^*^a, b, A.V. Targonsky^#^a, b, A.V. Rogachev^°^b, V.A. Korzhov^&^a, b, S.N. Yakunin^b, M.V. Kovalchuk^a, b
^aFederal Scientific Research Center "Crystallography and Photonics", Russian Academy of Sciences, Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii prosp. 59, Moscow, 119333, Russian Federaion
^bNational Research Centre ‘Kurchatov Institute’, pl. akad. Kurchatova 1, Moscow, 123182, Russian Federation

We performed an in-situ study of the Belousov—Zhabotinsky self-oscillatory chemical reaction using the developed technique of time-resolved X-ray absorption spectroscopy implemented with the help of adaptive X-ray optical elements (AXOEs). The dynamics of the K-edge absorption of bromine (Br), which is found in various substances during the reaction, were monitored. We carried out sequential recordings of the K-edge absorption spectrum of bromine in the vicinity of 275 eV with a spectral resolution of better than 1.4 eV, an accumulation time of 1 s per spectrum, and a repetition rate of 0.71 Hz. The acquired series of spectra allow us to trace the kinetics of the Belousov—Zhabotinsky reaction, in particular, the kinetics of chemical self-oscillations taking place in it.

Keywords: time-resolved X-ray spectroscopy, adaptive X-ray optics, bending actuator
PACS: 07.85.Nc, 07.85.Qe, 61.05.cj (all)
DOI: 10.3367/UFNe.2022.12.039281
URL: https://ufn.ru/en/articles/2023/12/e/
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2-s2.0-85183007471
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2023PhyU...66.1258P
Citation: Protsenko A I, Eliovich I A, Blagov A E, Pisarevsky Yu V, Targonsky A V, Rogachev A V, Korzhov V A, Yakunin S N, Kovalchuk M V "Investigation of the dynamics of the Belousov—Zhabotinsky reaction by time-resolved X-ray absorption spectroscopy using adaptive X-ray optical elements" Phys. Usp. 66 1258–1261 (2023)

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Received: 31st, October 2022, revised: 30th, November 2022, accepted: 1st, December 2022

Оригинал: Проценко А И, Элиович Я А, Благов А Е, Писаревский Ю В, Таргонский А В, Рогачёв А В, Коржов В А, Якунин С Н, Ковальчук М В «Исследование динамики реакции Белоусова—Жаботинского методом времяразрешающей рентгеновской спектроскопии поглощения с использованием адаптивных элементов рентгеновской оптики» УФН 193 1335–1339 (2023); DOI: 10.3367/UFNr.2022.12.039281