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Time-resolved Auger-Meitner spectroscopy of the photodissociation dynamics of CS2

Time-resolved Auger-Meitner spectroscopy of the photodissociation dynamics of CS2
Time-resolved Auger-Meitner spectroscopy of the photodissociation dynamics of CS2
The photodissociation dynamics of UV excited CS2 are investigated using time-resolved Auger-Meitner spectroscopy. Auger-Meitner decay is initiated by inner-shell ionisation with a femtosecond duration X-ray (179.9 eV) probe generated by the FERMI free electron laser. The time-delayed X-ray probe removes an electron from the S(2p) orbital leading to secondary emission of a high energy electron through Auger-Meitner decay. We monitor the electron kinetic energy of the Auger-Meitner emission as a function of pump-probe delay and observe time-dependent changes in the spectrum that correlate with the formation of bound, excited-state CS2 molecules at early times, and CS + S fragments on the picosecond timescale. The results are analysed based on a simplified kinetic scheme that provides a time constant for dissociation of approximately 1.2 ps, in agreement with previous time-resolved X-ray photoelectron spectroscopy measurements (Gabalski, et al. J. Phys. Chem. Lett. 2023, 14, 7126–7133).
Auger spectroscopy, free electron lasers, time-resolved x-ray spectroscopy
0022-3700
Thompson, Henry James
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Plekan, Oksana
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Bonanomi, Matteo
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Pal, Nitish
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Allum, Felix
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Brynes, Alexander Darius
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Coreno, Marcello
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Coriani, Sonia
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Danailov, Miltcho
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Decleva, Piero
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Demidovich, Alexander
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Devetta, Michele
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Faccialà, Davide
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Feifel, Raimund
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Forbes, Ruaridh
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Grazioli, Cesare
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Holland, David M.P.
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Piseri, Paolo
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Prince, Kevin
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Rolles, Daniel
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Schuurman, Michael
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Simoncig, Alberto
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Squibb, Richard J.
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Tenorio, Bruno N.C.
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Vozzi, Caterina
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Zangrando, Marco
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Callegari, Carlo
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Minns, Russell
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Di Fraia, Michele
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Thompson, Henry James
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Plekan, Oksana
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Bonanomi, Matteo
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Pal, Nitish
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Allum, Felix
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Brynes, Alexander Darius
fb6dd9fb-608f-442e-866c-0a3cbc4ca842
Coreno, Marcello
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Coriani, Sonia
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Danailov, Miltcho
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Decleva, Piero
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Demidovich, Alexander
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Devetta, Michele
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Faccialà, Davide
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Feifel, Raimund
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Forbes, Ruaridh
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Grazioli, Cesare
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Holland, David M.P.
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Piseri, Paolo
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Prince, Kevin
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Rolles, Daniel
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Schuurman, Michael
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Simoncig, Alberto
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Squibb, Richard J.
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Tenorio, Bruno N.C.
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Vozzi, Caterina
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Zangrando, Marco
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Callegari, Carlo
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Minns, Russell
85280db4-c5a6-4a4c-82fe-75693c6a6045
Di Fraia, Michele
8277d95f-4f16-4c99-894a-4a2479cdbde1

Thompson, Henry James, Plekan, Oksana, Bonanomi, Matteo, Pal, Nitish, Allum, Felix, Brynes, Alexander Darius, Coreno, Marcello, Coriani, Sonia, Danailov, Miltcho, Decleva, Piero, Demidovich, Alexander, Devetta, Michele, Faccialà, Davide, Feifel, Raimund, Forbes, Ruaridh, Grazioli, Cesare, Holland, David M.P., Piseri, Paolo, Prince, Kevin, Rolles, Daniel, Schuurman, Michael, Simoncig, Alberto, Squibb, Richard J., Tenorio, Bruno N.C., Vozzi, Caterina, Zangrando, Marco, Callegari, Carlo, Minns, Russell and Di Fraia, Michele (2024) Time-resolved Auger-Meitner spectroscopy of the photodissociation dynamics of CS2. Journal of Physics B, 57 (21), [215602]. (doi:10.1088/1361-6455/ad7e89).

Record type: Article

Abstract

The photodissociation dynamics of UV excited CS2 are investigated using time-resolved Auger-Meitner spectroscopy. Auger-Meitner decay is initiated by inner-shell ionisation with a femtosecond duration X-ray (179.9 eV) probe generated by the FERMI free electron laser. The time-delayed X-ray probe removes an electron from the S(2p) orbital leading to secondary emission of a high energy electron through Auger-Meitner decay. We monitor the electron kinetic energy of the Auger-Meitner emission as a function of pump-probe delay and observe time-dependent changes in the spectrum that correlate with the formation of bound, excited-state CS2 molecules at early times, and CS + S fragments on the picosecond timescale. The results are analysed based on a simplified kinetic scheme that provides a time constant for dissociation of approximately 1.2 ps, in agreement with previous time-resolved X-ray photoelectron spectroscopy measurements (Gabalski, et al. J. Phys. Chem. Lett. 2023, 14, 7126–7133).

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Accepted/In Press date: 3 September 2024
e-pub ahead of print date: 23 September 2024
Keywords: Auger spectroscopy, free electron lasers, time-resolved x-ray spectroscopy
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Identifiers

Local EPrints ID: 494177
URI: http://eprints.soton.ac.uk/id/eprint/494177
DOI: doi:10.1088/1361-6455/ad7e89
ISSN: 0022-3700
PURE UUID: 4b729d55-21db-4ab6-878c-e5402a79683c
ORCID for Russell Minns: ORCID iD orcid.org/0000-0001-6775-2977

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Date deposited: 26 Sep 2024 16:49
Last modified: 17 Oct 2024 01:43

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Contributors

Author: Henry James Thompson
Author: Oksana Plekan
Author: Matteo Bonanomi
Author: Nitish Pal
Author: Felix Allum
Author: Alexander Darius Brynes
Author: Marcello Coreno
Author: Sonia Coriani
Author: Miltcho Danailov
Author: Piero Decleva
Author: Alexander Demidovich
Author: Michele Devetta
Author: Davide Faccialà
Author: Raimund Feifel
Author: Ruaridh Forbes
Author: Cesare Grazioli
Author: David M.P. Holland
Author: Paolo Piseri
Author: Kevin Prince
Author: Daniel Rolles
Author: Michael Schuurman
Author: Alberto Simoncig
Author: Richard J. Squibb
Author: Bruno N.C. Tenorio
Author: Caterina Vozzi
Author: Marco Zangrando
Author: Carlo Callegari
Author: Russell Minns ORCID iD
Author: Michele Di Fraia

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