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JOURNALS // Uspekhi Fizicheskikh Nauk // Archive

UFN, 2023 Volume 193, Number 12, Pages 1335–1339 (Mi ufn15574)

INSTRUMENTS AND METHODS OF INVESTIGATION

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

A. I. Protsenkoab, I. A. Eliovichab, A. E. Blagovab, Yu. V. Pisarevskyab, A. V. Targonskyab, A. V. Rogachevb, V. A. Korzhovab, S. N. Yakuninb, M. V. Kovalchukab

a Shubnikov Crystallography Institute, Federal Scientific Research Center Crystallography and Photonics, Russian Academy of Sciences, Moscow
b National Research Centre Kurchatov Institute, Moscow

Abstract: 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.

PACS: 07.85.Nc, 07.85.Qe, 61.05.cj

Received: October 31, 2022
Revised: November 30, 2022
Accepted: December 1, 2022

DOI: 10.3367/UFNr.2022.12.039281


 English version:
Physics–Uspekhi, 2023, 66:12, 1258–1261

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© Steklov Math. Inst. of RAS, 2024