Time-resolved Auger–Meitner spectroscopy of the photodissociation dynamics of CS 2

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

doi:10.1088/1361-6455/ad7e89

Title: Time-resolved Auger–Meitner spectroscopy of the photodissociation dynamics of CS ₂

Journal Article · 01 October 2024 · Journal of Physics. B, Atomic, Molecular and Optical Physics

DOI: https://doi.org/10.1088/1361-6455/ad7e89 · OSTI ID:2452851

;

; Bonanomi, Matteo;

;

; Coreno, Marcello; Coriani, Sonia; Danailov, Miltcho B.;

; Demidovich, Alexander;

;

; Feifel, Raimund;

;

; Piseri, Paolo; Prince, Kevin C.;

Abstract The photodissociation dynamics of UV excited CS ₂ are investigated using time-resolved Auger–Meitner (AM) spectroscopy. AM 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 AM decay. We monitor the electron kinetic energy of the AM 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 CS ₂ 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 2023 J. Phys. Chem. Lett. 14 7126–7133).

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Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-76SF00515; FG02-86ER13491

OSTI ID:: 2452851

Journal Information:: Journal of Physics. B, Atomic, Molecular and Optical Physics, Journal Name: Journal of Physics. B, Atomic, Molecular and Optical Physics Journal Issue: 21 Vol. 57; ISSN 0953-4075

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Title: Time-resolved Auger–Meitner spectroscopy of the photodissociation dynamics of CS ₂