Charge and energy transfer in argon-core–neon-shell clusters irradiated by free-electron-laser pulses at 62 nm

Sugishima, A.; Iwayama, H.; Yase, S.; Murakami, Hitoshi; Nagaya, K.; Yao, Makoto; Fukuzawa, H.; Liu, X.-J.; Motomura, K.; Ueda, Kiyoshi; Saitô, Norio; Foucar, L.; Rudenko, Artem; Курка, М.; Kühnel, K. U.; Ullrich, J.; Czasch, A.; Dørner, R.; Feifel, Raimund; Nagasono, Mitsuru; Higashiya, A.; Yabashi, Makina; Ishikawa, Tetsuya; Togashi, Tadashi; Kimura, Hiroaki; Ohashi, Haruhiko

doi:10.1103/physreva.86.033203

Cited by 14 publications

(9 citation statements)

References 41 publications

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“…Intense EUV-FEL pulses were focused on a Ne cluster beam, and the kinetic energy distribution of emitted electrons was measured with a velocity map imaging (VMI) spectrometer28. The Ne clusters were prepared by adiabatic expansion of Ne gas through a 0.25 mm nozzle29. The Ne stagnation pressure was 10.8 bar, and the nozzle was cooled to 80 K using liquid nitrogen.…”

Section: Methodsmentioning

confidence: 99%

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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Section: Methodsmentioning

confidence: 99%

Interatomic Coulombic decay cascades in multiply excited neon clusters

et al. 2016

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“…At SCSS, over the photon energy range 20 and 24 eV, with the FEL power density in the range 10 11 − 10 14 W/cm 2 , Nagaya and coworkers investigated extensively EUVFEL-induced dynamics of various rare gas clusters [373][374][375][376][377][378][379][380]. Under these experimental conditions they found (via ion spectrometry) frustration of direct cluster photoionization stemming from the strong Coulomb potential of the highly ionized cluster but no indication for heating mechanisms other than sequential photoionization of the individual atoms in the cluster [373,374,377].…”

Section: Clustersmentioning

confidence: 99%

Short-wavelength free-electron laser sources and science: a review

et al. 2017

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This review is focused on free-electron lasers (FELs) in the hard to soft x-ray regime. The aim is to provide newcomers to the area with insights into: the basic physics of FELs, the qualities of the radiation they produce, the challenges of transmitting that radiation to end users and the diversity of current scientific applications. Initial consideration is given to FEL theory in order to provide the foundation for discussion of FEL output properties and the technical challenges of short-wavelength FELs. This is followed by an overview of existing x-ray FEL facilities, future facilities and FEL frontiers. To provide a context for information in the above sections, a detailed comparison of the photon pulse characteristics of FEL sources with those of other sources of high brightness x-rays is made. A brief summary of FEL beamline design and photon diagnostics then precedes an overview of FEL scientific applications. Recent highlights are covered in sections on structural biology, atomic and molecular physics, photochemistry, non-linear spectroscopy, shock physics, solid density plasmas. A short industrial perspective is also included to emphasise potential in this area.

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“…To push the experimental sensitivity toward processes that occur inside the cluster ion core on the sub-ps time scale when the core is still close to its initial geometry, we performed complementary fluorescence experiments on Xe-core-Ar-shell clusters. In the past, various experimental and theoretical studies have been performed on FELinduced ultrafast nanoplasma dynamics [7,8,[21][22][23][24][25][26]. In most cases ion spectra were evaluated that have been recorded with time-of-flight (TOF) techniques.…”

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confidence: 99%

Hidden Charge States in Soft-X-Ray Laser-Produced Nanoplasmas Revealed by Fluorescence Spectroscopy

et al. 2014

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Highly charged ions are formed in the center of composite clusters by strong free-electron laser pulses and they emit fluorescence on a femtosecond time scale before competing recombination leads to neutralization of the nanoplasma core. In contrast to mass spectrometry that detects remnants of the interaction, fluorescence in the extreme ultraviolet spectral range provides fingerprints of transient states of high energy density matter. Spectra from clusters consisting of a xenon core and a surrounding argon shell show that a small fraction of the fluorescence signal comes from multiply charged xenon ions in the cluster core. Initially, these ions are as highly charged as the ions in the outer shells of pure xenon clusters with charge states up to at least 11+.

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Charge and energy transfer in argon-core–neon-shell clusters irradiated by free-electron-laser pulses at 62 nm

Cited by 14 publications

References 41 publications

Interatomic Coulombic decay cascades in multiply excited neon clusters

Interatomic Coulombic decay cascades in multiply excited neon clusters

Short-wavelength free-electron laser sources and science: a review

Hidden Charge States in Soft-X-Ray Laser-Produced Nanoplasmas Revealed by Fluorescence Spectroscopy

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