Threshold scan of the Ne 2s-electron photoionization cross section

Schartner, K.‐H.; Möbus, B.; Mentzel, G.; Ehresmann, A.; Vollweiler, F.; Schmoranzer, H.

doi:10.1016/0375-9601(92)90246-i

Cited by 12 publications

(14 citation statements)

References 13 publications

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“…In the electron yield from the monomers ( figure 2(a)), the well-known 2s-np autoionising atomic Rydberg resonances [34] are clearly visible. The corresponding fluorescence yield (figure 2(b)) does not exhibit prominent features and only at the energy close to the 2s-electron ionization threshold one observes a clear increase in intensity [35]. This is known to be due to fast autoionization of the 2s-np resonances, suppressing fluorescence emission, except for high-lying Rydberg states [36].…”

Section: Resultsmentioning

confidence: 94%

Detecting ultrafast interatomic electronic processes in media by fluorescence

et al. 2014

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Interatomic coulombic decay (ICD), a radiationless transition in weakly bonded systems, such as solutes or van der Waals bound aggregates, is an effective source for electrons of low kinetic energy. So far, the ICD processes could only be probed in ultra-high vacuum by using electron and/or ion spectroscopy. Here we show that resonant ICD processes can also be detected by measuring the subsequently emitted characteristic fluorescence radiation, which makes their study in dense media possible.

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Section: Resultsmentioning

confidence: 94%

Detecting ultrafast interatomic electronic processes in media by fluorescence

et al. 2014

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“…2b at the exciting-photon energies above the atomic 2s-ionization threshold at 48.48 eV [32]. The observed signal corresponds to the 2s −1 → 2p −1 VUV line in Ne [33] at about 46.1 nm. Within the experimental uncertainties, we do not observe significant changes in the fluorescence signal in between the last cluster resonance and the atomic ionization threshold.…”

Section: Resultsmentioning

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 panel (a) the VUV photon emission of an atomic jet is shown. The 2s-ionization threshold is calibrated to a cross section of 0.17 Mb ± 25% per atom at 48.6 eV [23]. The narrow, not well resolved peaks below the 60 threshold correspond to excitation of atomic high n 1s 2 2s 1 2p 6 np resonances, whose fluorescence decays 2s 1 2p 6 np → 2s 2 2p 5 np close to 46 nm can compete with autoionization [44].…”

Section: Resultsmentioning

confidence: 99%

“…The relative uncertainties of the given absolute values were estimated to be 80%, including the uncertainties from the degree of condensation, determined with the electron spectrometer (≈ 15 − 20%), and its correction due to experiment-specific parameters (≈ 25−35%) and the uncertainties given for the atomic benchmarks (≈ 20 − 25%, [26,23]). However, due to a high signal to noise ratio, the statistical uncertainties are below 25%.…”

Section: Resultsmentioning

confidence: 99%

Determination of absolute cross sections for cluster-specific decays

Hans

Knie

Förstel

et al. 2016

J. Phys. B: At. Mol. Opt. Phys.

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Fluorescence spectrometry is used to determine absolute cross sections of cluster-specific decay processes following photon excitation. Absolute values for selected processes in partially condensed supersonic jets are determined using atomic benchmarks. This method is applicable to a wide variety of processes in clusters in which a photon is emitted. In a proof-of-principle experiment, absolute cross sections of processes in two prototype systems were measured: I) inner-valence excitation and ionization of Ar clusters and II) resonant Interatomic Coulombic Decay (rICD) in Ne clusters. Example II is the first measurement of absolute cross sections of ICD whatsoever.

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Threshold scan of the Ne 2s-electron photoionization cross section

Cited by 12 publications

References 13 publications

Detecting ultrafast interatomic electronic processes in media by fluorescence

Detecting ultrafast interatomic electronic processes in media by fluorescence

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

Determination of absolute cross sections for cluster-specific decays

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