Highly Charged Rydberg Ions from the Coulomb Explosion of Clusters

Komar, D.; Kazak, L.; Almassarani, Mohammed; Meiwes‐Broer, Karl‐Heinz; Tiggesbäumker, J.

doi:10.1103/physrevlett.120.133207

Cited by 10 publications

(12 citation statements)

References 32 publications

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“…The long tail of the size distribution at larger sizes could easily contribute to the observed MCAI even when the most probable size is still below the threshold. This evaporation model is different from typical strong field CE achieved via ultrafast lasers, 40 but it is similar to that proposed by Wabnitz et al on ionization of Xe n using a freeelectron laser. 41 In essence, the MCAI observed in this experiment are not directly ionized; rather, they are formed as they leave the cluster.…”

supporting

confidence: 65%

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Coulomb Explosion in Nanosecond Laser Fields

Zhang

Yao

Kong

2020

J. Phys. Chem. Lett.

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We report experimental observations of Coulomb explosion using a nanosecond laser at 532 nm with intensities less than 10 12 W/cm 2 . We observe multiply charged atomic ions Ar n+ (1 ≤ n ≤ 7) and C n+ (1 ≤ n ≤ 4) from argon clusters doped with molecules containing aromatic chromophores.The yield of Ar n+ depends on the size of the cluster, the number density, and the photostability of the dopant. We propose that resonant absorption of Ar N + achieves a high degree of ionization, and the highly positively charged cluster has the capability to strip electrons from the evaporating Ar + on the surface of the cluster prior to Coulomb explosion, forming Ar n+ .

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supporting

confidence: 65%

“…This evaporation model is different from typical strong field CE achieved via ultrafast lasers, but it is similar to that proposed by Wabnitz et al on ionization of Xe n using a free-electron laser . In essence, the MCAI observed in this experiment are not directly ionized; rather, they are formed as they leave the cluster.…”

supporting

confidence: 65%

Coulomb Explosion in Nanosecond Laser Fields

Zhang

Yao

Kong

2020

J. Phys. Chem. Lett.

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“…Note that the decay constant of the high-energy feature is larger than in the experiment because of focal volume averaging that was not taken into account in the simulation. The decay constant of the simulated LES agrees qualitatively with the experiment, but electron emission will take place over much longer timescales [40,42] than those for which calculations are currently feasible, so exact agreement is not expected.…”

mentioning

confidence: 54%

“…The shoulder was previously attributed to correlated electronic decay processes [36] and cascades of intra-Rydberg interatomic Coulombic decay transitions [37,38] producing singly charged ions and electrons with kinetic energies up to the ionization potential of the cluster atoms, i.e., up to about 15.8 eV for Ar. Further examples of recently discovered correlation-driven cluster ionization processes include collective autoionization [39], autoionization of spin-orbit-excited states [40], as well as the relaxation of multiply charged ions by Auger decay [41] and autoionization [42].…”

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confidence: 99%

Low-Energy Electron Emission in the Strong-Field Ionization of Rare Gas Clusters

et al. 2018

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Clusters and nanoparticles have been widely investigated to determine how plasmonic near fields influence the strong-field induced energetic electron emission from finite systems. We focus on the contrary, i.e., the slow electrons, and discuss a hitherto unidentified low-energy structure (LES) in the photoemission spectra of rare gas clusters in intense near-infrared laser pulses. For Ar and Kr clusters we find, besides field-driven fast electrons, a robust and nearly isotropic emission of electrons with <4 eV kinetic energies that dominates the total yield. Molecular dynamics simulations reveal a correlated few-body decay process involving quasifree electrons and multiply excited ions in the nonequilibrium nanoplasma that results in a dominant LES feature. Our results indicate that the LES emission occurs after significant nanoplasma expansion, and that it is a generic phenomenon in intense laser nanoparticle interactions, which is likely to influence the formation of highly charged ions.

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“…2018; Komar et al. 2018), and X-ray and ultraviolet photons (Gordienko et al. 2005; Garmatina et al.…”

Section: Introductionmentioning

confidence: 99%

Soft X-ray emission from an anharmonic collisional nanoplasma by a laser–nanocluster interaction

Siahmazgi

Jafari

2021

J. Plasma Phys.

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The purpose of the present paper is to investigate the generation of soft X-ray emission from an anharmonic collisional nanoplasma by a laser–nanocluster interaction. The electric field of the laser beam interacts with the nanocluster and leads to ionization of the cluster atoms, which then produces a nanoplasma. Because of the nonlinear restoring force in an anharmonic nanoplasma, the fluctuations and heating rate of, as well as the power radiated by, the electrons in the nanocluster plasma will be notably different from those arising from a linear restoring force. By comparing the nonlinear restoring force state (which arises from an anharmonic cluster) with that of the linear restoring force (in harmonic clusters), the cluster temperature specifically changes at the resonant frequency relative to the linear restoring force, while the variation of the anharmonic cluster radius is almost identical to that of the harmonic cluster radius. In addition, it is revealed that a sharp peak of X-ray emission arises after some picoseconds in deuterium, helium, neon and argon clusters.

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Highly Charged Rydberg Ions from the Coulomb Explosion of Clusters

Cited by 10 publications

References 32 publications

Coulomb Explosion in Nanosecond Laser Fields

Coulomb Explosion in Nanosecond Laser Fields

Low-Energy Electron Emission in the Strong-Field Ionization of Rare Gas Clusters

Soft X-ray emission from an anharmonic collisional nanoplasma by a laser–nanocluster interaction

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