Electron-Transfer-Mediated Decay and Interatomic Coulombic Decay from the Triply Ionized States in Argon Dimers

Sakai, Kentaro; Stoychev, Spas D.; Ouchi, T.; Higuchi, I.; Schöffler, M. S.; Mazza, Tommaso; Fukuzawa, H.; Nagaya, K.; Yao, Makoto; Tamenori, Y.; Kuleff, Alexander I.; Saitô, Norio; Ueda, Kiyoshi

doi:10.1103/physrevlett.106.033401

Cited by 74 publications

(49 citation statements)

References 26 publications

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“…Also, it is known that there are many variants of ICD, such as ICD from satellite states [4][5][6][7], ICD after Auger decay [8][9][10][11][12][13][14], resonant ICD [15][16][17] where inner-valence excited states decay via ICD-like spectator decay, and three-electron ICD [18,19] where two inner-valence holes in a species are filled by ICD in which three electrons are involved. Another exotic variant, called electron-transfer-mediated decay (ETMD), was also predicted [20] and observed [21,22].…”

Section: Introductionmentioning

confidence: 98%

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

et al. 2013

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We identified interatomic Coulombic decay (ICD) channels in argon dimers after spectator-type resonant Auger decay 2p −1 3d → 3p −2 3d,4d in one of the atoms, using momentum-resolved electron-ion-ion coincidence. The results illustrate that the resonant core excitation is a very efficient way of producing slow electrons at a specific site, which may cause localized radiation damage. We find also that ICD rate for 3p −2 4d is significantly lower than that for 3p −2 3d.

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Section: Introductionmentioning

confidence: 98%

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

et al. 2013

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“…In ETMD (see Fig. 1) a neighbor donates an electron to the ion, while the released energy is simultaneously transferred either to the donor or to another neighboring species ionizing an additional electron [18][19][20]. Therefore, the neutralization of ions via ETMD is accompanied by an increase in the charge state of the complete system.…”

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confidence: 96%

“…Such ions may be obtained, for example, in the electron shakeoff process or if more than one electron is emitted in the Auger decay (double Auger process) [38]. Indeed, the ETMD(2) process of triply ionized Ar has been recently observed following Auger decay in Ar dimers [20]. Alternatively, multiply charged ions may be produced after Auger decay of cationic species.…”

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confidence: 97%

Efficient Pathway to Neutralization of Multiply Charged Ions Produced in Auger Processes

et al. 2013

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After core ionization of an atom or molecule by an x-ray photon, multiply charged ions are produced in the Auger decay process. These ions tend to neutralize their charge when embedded in an environment. We demonstrate that, depending on the atom or molecule and its neighbors, electron transfer mediated decay (ETMD) provides a particularly efficient neutralization pathway for the majority of the ions produced by Auger decay. The mechanism is rather general. As a showcase example, we conducted an ab initio study of the NeKr2 cluster after core ionization of the Ne atom. This example has been chosen because it is amenable to both ab initio calculations and coincidence experiments. We find that even for frozen nuclei, the neutralization rate can be as fast as 0.130 ps(-1). We also show that nuclear dynamics may increase the rate by about an order of magnitude. The generality of the mechanism makes this neutralization pathway important in weakly bonded environments.

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“…Therefore, previous work on the interatomic decay in rare-gas clusters showed that ICD proceeds on a timescale of tens of femtoseconds compared to the picosecond timescale of ETMD [16]. As a result, ETMD is usually observed if the decaying state does not have enough excess energy to decay by ICD [17,18]. This was specifically demonstrated to be the case for multiply charged ions produced in clusters by the Auger decay process [19].…”

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The role of metal ions in X-ray-induced photochemistry

2016

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Metal ions play numerous important roles in biological systems being central to the function of biomolecules. In this letter we show that the absorption of X-rays by these ions leads to a complicated chain of ultrafast relaxation steps resulting in the complete degradation of their nearest environment. We conducted high quality ab initio studies on microsolvated Mg 2+ clusters demonstrating that ionisation of an 1s-electron of Mg leads to a complicated electronic cascade comprising both intra-and intermolecular steps and lasting only a few hundreds femtoseconds.The metal cation reverts to its original charge state at the end of the cascade, while the nearest solvation shell becomes multiply ionised and large concentrations of radical and slow electron species build up in the metal's vicinity. We conclude that such cascades involving metal ions are essential for understanding the radiation chemistry of solutions and radiation damage to metal containing biomolecules.

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Electron-Transfer-Mediated Decay and Interatomic Coulombic Decay from the Triply Ionized States in Argon Dimers

Cited by 74 publications

References 26 publications

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

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

Efficient Pathway to Neutralization of Multiply Charged Ions Produced in Auger Processes

The role of metal ions in X-ray-induced photochemistry

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