Charge transfer to ground-state ions produces free electrons

You, Daehyun; Fukuzawa, H.; Sakakibara, Yuta; Takanashi, Tsukasa; Ito, Yuta; Maliyar, Gianluigi Grimaldi; Motomura, K.; Nagaya, K.; Nishiyama, Toshiyuki; Asa, Kazuki; Sato, Yoshibumi; Saitô, Norio; Oura, M.; Schöffler, M. S.; Kastirke, Gregor; Hergenhahn, U.; Stumpf, Vasili; Gokhberg, Kirill; Kuleff, Alexander I.; Cederbaum, Lorenz S.; Ueda, Kiyoshi

doi:10.1038/ncomms14277

Cited by 24 publications

(20 citation statements)

References 29 publications

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“…For weakly interacting constituents of such a cluster system, it was recently discovered that doubly charged ground-state ions can deexcite by charge transfer from their environment, even if the ion is not part of an actual chemical bond. For instance, electron transfer mediated decay (ETMD) was observed in NeKr clusters [3]. Here, a 4p electron is transferred from a Kr atom to fill one of the two 2p valence vacancies in a Ne 2þ dication, and the released energy ionizes another adjacent Kr atom.…”

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confidence: 99%

Electronic Decay of Singly Charged Ground-State Ions by Charge Transfer via van der Waals Bonds

et al. 2019

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We report the observation of the radiative decay of singly charged noble gas ground-state ions embedded in heterogeneous van der Waals clusters. Electron-photon coincidence spectroscopy and dispersed photon spectroscopy are applied to identify the radiative charge transfer from Kr atoms to a Ne þ 2 dimer, which forms after single valence photoionization of Ne atoms at the surface of a NeKr cluster. This mechanism might be a fundamental decay process of ionized systems in an environment.

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confidence: 99%

Electronic Decay of Singly Charged Ground-State Ions by Charge Transfer via van der Waals Bonds

et al. 2019

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“…For this reason, neon has been systematically used to test new many-body theoretical methods. More recently, due to the recent advances in the generation of shorter and shorter pulses and the possibility to track electron wave-packet dynamics in real time, there has been a renewed interest in this system [58][59][60][61][62] that calls for additional theoretical effort.…”

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confidence: 99%

Photoionization using the xchem approach: Total and partial cross sections of Ne and resonance parameters above the 2s22p5 threshold

et al. 2017

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The XCHEM approach interfaces well established quantum chemistry packages with scattering numerical methods in order to describe single-ionization processes in atoms and molecules. This should allow one to describe electron correlation in the continuum at the same level of accuracy as quantum chemistry methods do for bound states. Here we have applied this method to study multichannel photoionization of Ne in the vicinity of the autoionizing states lying between the 2s 2 2p 5 and 2s2p 6 ionization thresholds. The calculated total photoionization cross sections are in very good agreement with the absolute measurement of Samson et al.[J. Electron Spectrosc. Relat. Phenom. 123, 265 (2002)], and with independent benchmark calculations performed at the same level of theory. From these cross sections, we have extracted resonance positions, total autoionization widths, Fano profile parameters, and correlation parameters for the lowest three autoionizing states. The values of these parameters are in good agreement with those reported in earlier theoretical and experimental work. We have also evaluated β asymmetry parameter and partial photoionization cross sections and, from the latter, partial autoionization widths and Starace parameters for the same resonances, not yet available in the literature. Resonant features in the calculated β parameter are in good agreement with the experimental observations. We have found that the three lowest resonances preferentially decay into the 2p −1 d continuum rather than into the 2p −1 s one [Phys. Rev. A 89, 043415 (2014)], in agreement with previous expectations, and that in the vicinity of the resonances the partial 2p −1 s cross section can be larger than the 2p −1 d one, in contrast with the accepted idea that the latter should amply dominate in the whole energy range. These results show the potential of the XCHEM approach to describe highly correlated process in the ionization continuum of many-electron systems, in particular molecules, for which the XCHEM code has been specifically designed.

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“…The released energy is subsequently used to emit a 4 p electron from yet another neutral Kr atom. 54 This relaxation path is energetically forbidden if the dication resides within a homogeneous environment. Here the released energy due to the transfer of an electron from a neutral atom to the doubly charged ion is not sufficient for further ionization of the same species.…”

Section: General Perspective On Electronic Decay Processesmentioning

confidence: 99%

Interatomic and Intermolecular Coulombic Decay

et al. 2020

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Interatomic or intermolecular Coulombic decay (ICD) is a nonlocal electronic decay mechanism occurring in weakly bound matter. In an ICD process, energy released by electronic relaxation of an excited atom or molecule leads to ionization of a neighboring one via Coulombic electron interactions. ICD has been predicted theoretically in the mid nineties of the last century, and its existence has been confirmed experimentally approximately ten years later. Since then, a number of fundamental and applied aspects have been studied in this quickly growing field of research. This review provides an introduction to ICD and draws the connection to related energy transfer and ionization processes. The theoretical approaches for the description of ICD as well as the experimental techniques developed and employed for its investigation are described. The existing body of literature on experimental and theoretical studies of ICD processes in different atomic and molecular systems is reviewed.

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Charge transfer to ground-state ions produces free electrons

Cited by 24 publications

References 29 publications

Electronic Decay of Singly Charged Ground-State Ions by Charge Transfer via van der Waals Bonds

Electronic Decay of Singly Charged Ground-State Ions by Charge Transfer via van der Waals Bonds

Photoionization using the xchem approach: Total and partial cross sections of Ne and resonance parameters above the 2s22p5 threshold

Interatomic and Intermolecular Coulombic Decay

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