Efficient site-specific low-energy electron production via interatomic Coulombic decay following resonant Auger decay in argon dimers

Kimura, M.; Fukuzawa, H.; Sakai, Kentaro; Mondal, Subhendu; Kukk, E.; Kono, Y.; Nagaoka, Shin‐ichi; Tamenori, Y.; Saitô, Norio; Ueda, Kiyoshi

doi:10.1103/physreva.87.043414

Cited by 25 publications

(28 citation statements)

References 41 publications

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“…Intriguingly it has been shown theoretically and verified experimentally that ICD is not an isolated phenomenon, but might be part of complex cascade relaxation mechanisms, occurring for instance following an Auger decay process67891011121314. To understand relaxation mechanisms, it is necessary to be aware of all possible channels and determine their significance, and in the present work, we investigated this subject.…”

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confidence: 92%

Interatomic Coulombic decay cascades in multiply excited neon clusters

et al. 2016

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In high-intensity laser light, matter can be ionized by direct multiphoton absorption even at photon energies below the ionization threshold. However on tuning the laser to the lowest resonant transition, the system becomes multiply excited, and more efficient, indirect ionization pathways become operative. These mechanisms are known as interatomic Coulombic decay (ICD), where one of the species de-excites to its ground state, transferring its energy to ionize another excited species. Here we show that on tuning to a higher resonant transition, a previously unknown type of interatomic Coulombic decay, intra-Rydberg ICD occurs. In it, de-excitation of an atom to a close-lying Rydberg state leads to electron emission from another neighbouring Rydberg atom. Moreover, systems multiply excited to higher Rydberg states will decay by a cascade of such processes, producing even more ions. The intra-Rydberg ICD and cascades are expected to be ubiquitous in weakly-bound systems exposed to high-intensity resonant radiation.

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confidence: 92%

Interatomic Coulombic decay cascades in multiply excited neon clusters

et al. 2016

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“…14 Its detailed experimental studies in Ar 2 , ArKr, ArXe, and ArNe demonstrated the functioning of the control mechanism. [14][15][16] In these experiments, the cascade was initiated by resonant photon excitation of a 2p core electron of Ar to the 4s or the nd, n = 3, 4, 5, virtual orbital. Resulting ICD electron spectra indeed show marked dependence on the parent core excitation.…”

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confidence: 99%

Interatomic Coulombic decay following resonant core excitation of Ar in argon dimer

Miteva

Chiang

Kolorenč

et al. 2014

The Journal of Chemical Physics

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A scheme utilizing excitation of core electrons followed by the resonant-Auger - interatomic Coulombic decay (RA-ICD) cascade was recently proposed as a means of controlling the generation site and energies of slow ICD electrons. This control mechanism was verified in a series of experiments in rare gas dimers. In this article, we present fully ab initio computed ICD electron and kinetic energy release spectra produced following 2p(3/2) → 4s, 2p(1/2) → 4s, and 2p(3/2) → 3d core excitations of Ar in Ar2. We demonstrate that the manifold of ICD states populated in the resonant Auger process comprises two groups. One consists of lower energy ionization satellites characterized by fast interatomic decay, while the other consists of slow decaying higher energy ionization satellites. We show that accurate description of nuclear dynamics in the latter ICD states is crucial for obtaining theoretical electron and kinetic energy release spectra in good agreement with the experiment.

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“…These involve the observation of ICD in rare gas dimers [5], rare gas clusters [6], surfaces [7], and small water droplets [8,9]. ICD followed by resonant Auger decay has been identified in Ar dimers using momentum resolved electron-ion-ion coincidence spectroscopy [10,11]. Ultrafast ICDs of a dicationic monomer in a cluster to produce a cluster tricataion [12] Of particular interest is the resonant ICD (RICD) where the precursor excitation to form an inner-shell vacancy is accomplished by promoting an inner electron to an excited state by an external stimulant, generally electromagnetic radiation [17,18] or, more recently, chargeparticle impact [21].…”

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Resonant Auger–intersite-Coulombic hybridized decay in the photoionization of endohedral fullerenes

Javani

Wise

et al. 2014

Phys. Rev. A

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Considering the photoionization of Ar@C 60 , we predict resonant femtosecond decays of both Ar and C 60 vacancies through the continua of atom-fullerene hybrid final states. The resulting resonances emerge from the interference between simultaneous autoionizing and intercoulombic decay (ICD) processes. For Ar 3s → np excitations, these resonances are far stronger than the Ar-to-C 60 resonant ICDs, while for C 60 excitations they are strikingly larger than the corresponding Auger features. The results indicate the power of hybridization to enhance decay rates, and modify lifetimes and line profiles. [4] research has gone into studying ICD processes in weakly bound atomic systems. These involve the observation of ICD in rare gas dimers [5], rare gas clusters [6], surfaces [7], and small water droplets [8,9]. ICD followed by resonant Auger decay has been identified in Ar dimers using momentum resolved electron-ion-ion coincidence spectroscopy [10,11]. Ultrafast ICDs of a dicationic monomer in a cluster to produce a cluster tricataion [12] Of particular interest is the resonant ICD (RICD) where the precursor excitation to form an inner-shell vacancy is accomplished by promoting an inner electron to an excited state by an external stimulant, generally electromagnetic radiation [17,18] or, more recently, chargeparticle impact [21]. A theoretical study of RICD followed by Ne 2s → np excitations in MgNe clusters suggested the leading contribution of RICD among other interatomic decay modes [22]. Photoelectron spectroscopy with Ne clusters for 2s → np excitations measured the signature of RICD processes [17]. Similar excitations in the double photoionization of Ne dimers were utilized to observe RICD by tracking the formation of energetic Ne + fragments [18]. Most recently, strong enhancement of the HeNe + yield, as He resonantly couples with the radiation, is detected [19], confirming an earlier prediction [20].Atoms confined in fullerene shells forming endofullerene compounds are particularly attractive natural laboratories to study RICD processes. There are two compelling reasons for this: (i) such materials are highly stable, have low-cost sustenance at the room temperature and are enjoying a rapid improvement in synthesis techniques [23]; and (ii) the effect of correlation of the central atom with the cage electrons have been predicted to spectacularly affect the atomic photoionization [24]. A first attempt to predict ICD in endofullerenes was made by calculating ICD rates for Ne@C 60 [25]. While some speculation on the role of Coulomb interaction mediated energy transfer from atom to fullerene to broaden Auger lines has been made [26,27], no studies, theoretical or experimental, of RICD resonances in the ionization cross section of endofullerenes have been performed. Furthermore, ICD of endofullerene molecules can uncover effects not yet known. This is because: (i) endofullerenes being spherical analogues of asymmetric dimers consisting of an atom and a cluster can also induce reverse RICD processes, the decay of...

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Efficient site-specific low-energy electron production via interatomic Coulombic decay following resonant Auger decay in argon dimers

Cited by 25 publications

References 41 publications

Interatomic Coulombic decay cascades in multiply excited neon clusters

Interatomic Coulombic decay cascades in multiply excited neon clusters

Interatomic Coulombic decay following resonant core excitation of Ar in argon dimer

Resonant Auger–intersite-Coulombic hybridized decay in the photoionization of endohedral fullerenes

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