X-ray emission of hollow atoms formed by highly charged argon and xenon ions below a beryllium surface

Zhao, Yongtao; Xiao, Guoqing; Zhang, Xiaoan; Yang, Zhenhua; Zhang, Yanping; Wenlong, Zhan; Chen, Ximeng; Li, Fuli

doi:10.1016/j.nimb.2006.12.178

Cited by 13 publications

(3 citation statements)

References 14 publications

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“…A conclusive answer could not be given using either method because the experiment selected certain trajectories including close collisions (backscattering) or surface effects, and contamination could not be neglected 25,[31][32][33] . Another approach was the detection of emitted X-rays from a Be target with high resolution 34,35 . This approach fails for slow ions which are stopped in a fraction of the radiative lifetime.…”

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confidence: 99%

Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid

et al. 2021

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Over seventy years ago, Niels Bohr described how the charge state of an atomic ion moving through a solid changes dynamically as a result of electron capture and loss processes, eventually resulting in an equilibrium charge state. Although obvious, this process has so far eluded direct experimental observation. By peeling a solid, such as graphite, layer by layer, and studying the transmission of highly charged ions through single-, bi- and trilayer graphene, we can now observe dynamical changes in ion charge states with monolayer precision. In addition we present a first-principles approach based on the virtual photon model for interparticle energy transfer to corroborate our findings. Our model that uses a Gaussian shaped dynamic polarisability rather than a spatial delta function is a major step in providing a self-consistent description for interparticle de-excitation processes at the limit of small separations.

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confidence: 99%

Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid

et al. 2021

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“…This is evidence of the secondary hollow atom formation mentioned in the COB model. Figure 3 shows the charge state dependence of two-electron one-photon (TEOP) transitions [16]. This dependence may be related both to the effective nuclear charge and to the increase of possible channels for TEOP transition that occurs when the number of initial M vacancies is increased.…”

Section: X-ray Emission Spectrummentioning

confidence: 99%

A platform for highly charged ions: surface–foil–gas–plasma interaction at the IMP

Cheng¹,

Zhou²,

Sun³

et al. 2011

Phys. Scr.

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A platform for the study of highly charged ions (HCIs), the surface-foil-gas-plasma interaction at IMP Lanzhou, is introduced. Some potentially useful results obtain over the last few years on x-ray emission, ion sputtering, secondary electron emission and the nano-etching effects during HCIs' impact on surfaces, as well as the guiding effect of nano-capillaries, are reviewed. Our ongoing work on the HCI interaction with plasma is also reported.

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“…The first sign of such exotic states was found in the x-ray spectra of foil-excited Mg and Al [4], and the experimental production of hollow atoms was performed 10 years later by the excitation of highly charged ions (HCI) in interaction with a metallic surface [5]. Since then, DCH atoms have been observed in collisions with fast HCIs [6][7][8][9] and electrons [10,11], and in the interaction of laser beams or synchrotron radiation [12][13][14][15][16][17][18][19][20]. There are more advantages in using a light source to produce hollow atoms than in using fast electrons or ions.…”

Section: Introductionmentioning

confidence: 99%

Single- and double-core-hole ion emission spectroscopy of transient neon plasmas produced by ultraintense x-ray laser pulses

Cheng

Zeng

Yuan

2016

J. Phys. B: At. Mol. Opt. Phys.

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Double core-hole (DCH) spectroscopy is investigated systematically for neon atomic system in the interaction with ultraintense x-ray pulses with photon energy from 937 eV to 2000 eV. A time-dependent rate equation, implemented in the detailed level accounting approximation, is utilized to study the dynamical evolution of the level population and emission properties of the highly transient plasmas. For x-ray pulses with photon energy in the range of 937-1030 eV, where 1s → 2p resonance absorption from single core-hole (SCH) states of neon charge states exist, inner-shell resonant absorption (IRA) effects play important roles in the time evolution of population and DCH spectroscopy. Such IRA physical effects are illustrated in detail by investigating the interaction of x-ray pulses at a photon energy of 944 eV, which corresponds to the 1s → 2p resonant absorption from the SCH states (1s2s 2 2p 4 , 1s2s2p 5 and 1s2p 6 ) of Ne 3+ . After averaging over the space and time distribution of the x-ray pulses, DCH spectroscopy at photon energies of 937, 944, 955, 968, 980, and 990 eV (corresponding to the 1s → 2p resonance energies of Ne 2+ -Ne 7+ , respectively) are studied in detail. The complex mechanisms of producing the DCH states are discussed, taking the DCH spectroscopy at 937 and 980 eV as examples. For photon energy larger than 1362 eV, there are no resonance absorption in the interaction, resulting in a similar physical picture of DCH spectroscopy. The dominant DCH states are due to higher ionization stages of Ne 7+ -Ne 9+ , while the DCH spectroscopy from lower charge states Ne 2+ -Ne 6+ are much weaker. With the increase of x-ray photon energy, the contributions from the lower charge states become larger.

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X-ray emission of hollow atoms formed by highly charged argon and xenon ions below a beryllium surface

Cited by 13 publications

References 14 publications

Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid

Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid

A platform for highly charged ions: surface–foil–gas–plasma interaction at the IMP

Single- and double-core-hole ion emission spectroscopy of transient neon plasmas produced by ultraintense x-ray laser pulses

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