Highly efficient double ionization of mixed alkali dimers by intermolecular Coulombic decay

LaForge, Aaron; Shcherbinin, M.; Stienkemeier, F.; Richter, Robert; Moshammer, R.; Pfeifer, Thomas; Mudrich, M.

doi:10.1038/s41567-018-0376-5

Cited by 50 publications

(50 citation statements)

References 38 publications

(50 reference statements)

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“…A similar double ionization mechanism caused by energy transfer, termed double ICD, was recently demonstrated. It was found to efficiently create two Ak ions by Coulomb explosion of doubly ionized alkali metal dimer [28].…”

Section: Resultsmentioning

confidence: 99%

“…Helium (He) has a simple electronic structure and the highest ionization energy amongst all elements. Therefore, pure or doped He nanodroplets offer a unique medium where interatomic/molecular decays can be studied [14,15,[20][21][22][23][24][25][26][27][28][29]. Owing to its chemical inertness and low temperature, attached dopant molecules are only weakly perturbed and tend to aggregate into weakly bound complexes inside the droplet or at the droplet surface.…”

Section: Introductionmentioning

confidence: 99%

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Electron transfer mediated decay of alkali dimers attached to He nanodroplets

Ltaief

Shcherbinin

Mandal

et al. 2020

Phys. Chem. Chem. Phys.

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Alkali metal dimers attached to the surface of helium nanodroplets are found to be efficiently doubly ionized by electron transfer-mediated decay (ETMD) when photoionizing the helium droplets. This process is evidenced by detecting in coincidence two energetic ions created by Coulomb explosion and one low-kinetic energy electron. The kinetic energy spectra of ions and electrons are reproduced by simple model calculations based on diatomic potential energy curves, and are in agreement with ab initio calculations for the HeNa 2 and HeKRb systems. This work demonstrates that ETMD is an important decay channel in heterogeneous nanosystems exposed to ionizing radiation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electron transfer mediated decay of alkali dimers attached to He nanodroplets

Ltaief

Shcherbinin

Mandal

et al. 2020

Phys. Chem. Chem. Phys.

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“…More recently, a corresponding process was observed where, instead of a two-electron transition providing the excitation energy for the emission of a third electron, the de-excitation of a single electron caused the simultaneous emission of two electrons. This process, which is the nonlocal equivalent to a double Auger decay, has been termed double-ICD (dICD) and was observed by LaForge and co-workers in mixed alkali dimers 269 (see Section 5.7.2 ). A corresponding decay pathway with respect to ETMD has been predicted in 2006 by Averbukh and Cederbaum to occur in Ne@C 60 endohedral fullerenes 80 (see Section 5.2.4 ).…”

Section: Systems and Applicationsmentioning

confidence: 91%

“…Works on ICD and ETMD that have used VMI electron spectroscopy are covered in refs ( 53 , 228 , 258 , 261 , and 269 − 274 ).…”

Section: Experimental Methodsmentioning

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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“…Another attracting process is intermolecular Coulombic decay . Recently, it was reported a new decay mechanism leading to the double ionization of alkali dimers attached to He droplets by intermolecular energy transfer . The idea to control the clustering process in molecular and cluster beams by strong laser field is very promising .…”

Section: Introductionmentioning

confidence: 99%

Small helium clusters formation

Popov

2019

Int J of Quantum Chemistry

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We investigated small helium clusters formation in nonequilibrium conditions using the non‐Hermitian formalism. Helium is a simple enough system for analytical study while complicated enough to have a rich variety of quantum properties. In this article, we used a new formalism based on non‐Hermitian quantum mechanics for describing the electronic excited states in clusters. This formalism enabled to estimate the decay time of excited states within a single scheme. Its implementation to helium shows the existence of new long‐lived excited states in small helium clusters at the distance of 5.6 Bohr radii between atoms. Moreover, several helium excimers and exciplexes at the distances between helium atoms of 35.5, 22.8, 14.0, and 8.5 Bohr radii with the scaling factor of about 1.6 were found. It is related to the restructuring of the electronic structure caused by powerful external excitations. These results give a new insight on clustering processes providing more profound and complete understanding.

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Highly efficient double ionization of mixed alkali dimers by intermolecular Coulombic decay

Cited by 50 publications

References 38 publications

Electron transfer mediated decay of alkali dimers attached to He nanodroplets

Electron transfer mediated decay of alkali dimers attached to He nanodroplets

Interatomic and Intermolecular Coulombic Decay

Small helium clusters formation

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