Detecting ultrafast interatomic electronic processes in media by fluorescence

Knie, André; Hans, Andreas; Förstel, Marko; Hergenhahn, U.; Schmidt, Philipp; Reiß, Philipp; Ozga, Christian; Kambs, Benjamin; Trinter, Florian; Voigtsberger, J.; Metz, D.; Jahnke, T.; Dørner, R.; Kuleff, Alexander I.; Cederbaum, Lorenz S.; Demekhin, Ph. V.; Ehresmann, A.

doi:10.1088/1367-2630/16/10/102002

Cited by 20 publications

(44 citation statements)

References 39 publications

(62 reference statements)

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“…This resonant ICD (RICD) can be characterized by the behaviour of the excited electron: it either participates in the decay process or not. The respective processes are called participator RICD (pRICD) [37] and spectator RICD (sRICD) [37][38][39][40][41][42]. In this work, we will focus on the sRICD signal: Unit A is excited from the inner valence.…”

Section: Introductionmentioning

confidence: 99%

Time-resolved spectroscopy of interparticle Coulombic decay processes

Faßhauer

Madsen

2020

Phys. Rev. A

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We report theory for time-resolved spectator resonant Interparticle Coulombic Decay (ICD) processes. Following excitation by a short extreme ultraviolet pulse, the spectrum of the resonant ICD electron develops. Strong-field ionization is imagined to quench the decay at different time delays and to initiate regular ICD.In this latter process, the ICD electron signal can be measured without interference effects. The typical lifetimes of ICD processes allow for the observation of oscillations of the time-and energy-differential ionization probability. We propose to utilize this oscillation to measure lifetimes of electronic decay processes.

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Section: Introductionmentioning

confidence: 99%

Time-resolved spectroscopy of interparticle Coulombic decay processes

Faßhauer

Madsen

2020

Phys. Rev. A

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“…The orders of magnitude larger mean free path of photons opens a door to investigate interatomic processes inside dense media. Recently [14], we have demonstrated that interatomic processes can also be studied by means of undispersed fluorescence spectroscopy. We found that RICD following the inner-valence excitation of neon clusters opens a particular fluorescence relaxation pathway.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence cascades evoked by resonant interatomic Coulombic decay of inner-valence excited neon clusters

et al. 2017

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Resonant interatomic Coulombic decay (RICD) in inner-valence excited neon clusters is observed by a combination of vacuumultraviolet (VUV) and UV/visible fluorescence spectroscopy. These ultrafast interatomic electronic processes efficiently quench radiation emission from inner-valence excited clusters. After RICD took place, outer-valence excited clusters relax further by emission of fluorescence. The direct correspondence of the structures observed in the VUV and UV/visible fluorescence signals implies that the final states of the spectator RICD decay by a cascade of radiative decays: First, by the Rydberg-to-Rydberg transitions in the UV/visible spectral range, and then, by the Rydberg-to-valence transition in the VUV range. Our study demonstrates a possibility of detecting interatomic electronic processes by UV/visible fluorescence spectroscopy.

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“…In other noble gases, mostly in Ar, emissions in the ultraviolet spectral range have been attributed to charge transfer processes in ion-atom collisions [25][26][27][28][29]. Recently [30][31][32], fluorescence detection has been successfully introduced as a tool to identify and characterize interatomic processes in clusters.…”

Section: Introductionmentioning

confidence: 99%

Direct evidence for radiative charge transfer after inner-shell excitation and ionization of large clusters

et al. 2018

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We directly observe radiative charge transfer (RCT) in Ne clusters by dispersed vacuum-ultraviolet photon detection. The doubly ionized Ne 2+ -Ne n 1 -initial states of RCT are populated after resonant 1s-3p photoexcitation or 1s photoionization of Ne n clusters with n 2800 á ñ » . These states relax further producing Ne + -Ne + -Ne n 2 -final states, and the RCT photon is emitted. Ab initio calculations assign the observed RCT signal to the Ne 2p D Ne ninitial state, while transitions from other possible initial states are proposed to be quenched by competing relaxation processes. The present results are in agreement with the commonly discussed scenario, where the doubly ionized atom in a noble gas cluster forms a dimer which dissipates its vibrational energy on a picosecond timescale. Our study complements the picture of the RCT process in weakly bound clusters, providing information which is inaccessible by charged particle detection techniques.

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Detecting ultrafast interatomic electronic processes in media by fluorescence

Cited by 20 publications

References 39 publications

Time-resolved spectroscopy of interparticle Coulombic decay processes

Time-resolved spectroscopy of interparticle Coulombic decay processes

Fluorescence cascades evoked by resonant interatomic Coulombic decay of inner-valence excited neon clusters

Direct evidence for radiative charge transfer after inner-shell excitation and ionization of large clusters

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