Interatomic processes play a crucial role in weakly bound complexes exposed to ionizing radiation; therefore, gaining a thorough understanding of their efficiency is of fundamental importance. Here, we directly measure the timescale of interatomic Coulombic decay (ICD) in resonantly excited helium nanodroplets using a high-resolution, tunable, extreme ultraviolet free-electron laser. Over an extensive range of droplet sizes and laser intensities, we discover the decay to be surprisingly fast, with decay times as short as 400 fs, nearly independent of the density of the excited states. Using a combination of timedependent density functional theory and ab initio quantum chemistry calculations, we elucidate the mechanisms of this ultrafast decay process, where pairs of excited helium atoms in one

Ultrafast Resonant Interatomic Coulombic Decay Induced by Quantum Fluid Dynamics / Laforge, A.  C.; Michiels, R.; Ovcharenko, Y.; Ngai, A.; Escartín, J.  M.; Berrah, N.; Callegari, C.; Clark, A.; Coreno, M.; Cucini, R.; Di Fraia, M.; Drabbels, M.; Fasshauer, E.; Finetti, P.; Giannessi, L.; Grazioli, C.; Iablonskyi, D.; Langbehn, B.; Nishiyama, T.; Oliver, V.; Piseri, P.; Plekan, O.; Prince, K.  C.; Rupp, D.; Stranges, S.; Ueda, K.; Sisourat, N.; Eloranta, J.; Pi, M.; Barranco, M.; Stienkemeier, F.; Möller, T.; Mudrich, M.. - In: PHYSICAL REVIEW. X. - ISSN 2160-3308. - 11:2(2021). [10.1103/PhysRevX.11.021011]

Ultrafast Resonant Interatomic Coulombic Decay Induced by Quantum Fluid Dynamics

Stranges, S.
Membro del Collaboration Group
;
2021

Abstract

Interatomic processes play a crucial role in weakly bound complexes exposed to ionizing radiation; therefore, gaining a thorough understanding of their efficiency is of fundamental importance. Here, we directly measure the timescale of interatomic Coulombic decay (ICD) in resonantly excited helium nanodroplets using a high-resolution, tunable, extreme ultraviolet free-electron laser. Over an extensive range of droplet sizes and laser intensities, we discover the decay to be surprisingly fast, with decay times as short as 400 fs, nearly independent of the density of the excited states. Using a combination of timedependent density functional theory and ab initio quantum chemistry calculations, we elucidate the mechanisms of this ultrafast decay process, where pairs of excited helium atoms in one
2021
Free Electron Laser radiation; XUV pump-probe spectroscopy; nanodroplets, ultrafast decay, superfluidity
01 Pubblicazione su rivista::01a Articolo in rivista
Ultrafast Resonant Interatomic Coulombic Decay Induced by Quantum Fluid Dynamics / Laforge, A.  C.; Michiels, R.; Ovcharenko, Y.; Ngai, A.; Escartín, J.  M.; Berrah, N.; Callegari, C.; Clark, A.; Coreno, M.; Cucini, R.; Di Fraia, M.; Drabbels, M.; Fasshauer, E.; Finetti, P.; Giannessi, L.; Grazioli, C.; Iablonskyi, D.; Langbehn, B.; Nishiyama, T.; Oliver, V.; Piseri, P.; Plekan, O.; Prince, K.  C.; Rupp, D.; Stranges, S.; Ueda, K.; Sisourat, N.; Eloranta, J.; Pi, M.; Barranco, M.; Stienkemeier, F.; Möller, T.; Mudrich, M.. - In: PHYSICAL REVIEW. X. - ISSN 2160-3308. - 11:2(2021). [10.1103/PhysRevX.11.021011]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1540400
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