Single-photon multiple ionization of neon in the K-edge region

Морган, Д.; Sagurton, M.; Bartlett, R. J.

doi:10.1103/physreva.55.1113

Cited by 25 publications

(21 citation statements)

References 21 publications

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“…The peak areas are 1.34, 0.89, and 0.0403 Mb eV and the resulting branching ratios for one-, two-and three-electron emission are approximately 59.0%, 39.2%, and 1.8%, respectively, quite different from the corresponding probabilities for the s s p 1 2 2 S 1 . The associated branching ratios measured by Morgan et al (1997) for the first K-shell excited term in neutral Ne are 65%, 32%, and 2%, not too far from the present  s p 1 3 result for Ne + ions.…”

Section: Resonance Parameters and Decay Probabilitiescontrasting

confidence: 60%

“…This is possible on the basis of an experimental investigation of single-photon multiple ionization of neon in the K-edge region by Morgan et al (1997), who determined branching ratios for the production of Ne ions in different charge states after population of the Ne ( ) s s p np 1 2 2 2 6 K-shell excited levels and the ( ) + s s p Ne 1 2 2 S 2 6 2 K-shell ionized residual ion. From the branching ratios the average ion charge was derived, which is identical to the average number of electrons released.…”

Section: Neutral Neon Atomsmentioning

confidence: 99%

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Photoionization of Ne Atoms and Ne⁺ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Müller

Bernhardt

Borovik

et al. 2017

ApJ

114

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Single, double, and triple photoionization of Ne + ions by single photons have been investigated at the synchrotron radiation source PETRA III in Hamburg, Germany. Absolute cross-sections were measured by employing the photon-ion merged-beams technique. Photon energies were between about 840 and 930 eV, covering the range from the lowest-energy resonances associated with the excitation of one single K-shell electron up to double excitations involving one K-and one L-shell electron, well beyond the K-shell ionization threshold. Also, photoionization of neutral Ne was investigated just below the K edge. The chosen photon energy bandwidths were between 32 and 500 meV, facilitating the determination of natural line widths. The uncertainty of the energy scale is estimated to be 0.2 eV. For comparison with existing theoretical calculations, astrophysically relevant photoabsorption cross-sections were inferred by summing the measured partial ionization channels. Discussion of the observed resonances in the different final ionization channels reveals the presence of complex Auger-decay mechanisms. The ejection of three electrons from the lowest K-shell-excited Ne + ( s s p 1 2 2 S 2 6 2 1 2 ) level, for example, requires cooperative interaction of at least four electrons.

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Section: Resonance Parameters and Decay Probabilitiescontrasting

confidence: 60%

Section: Neutral Neon Atomsmentioning

confidence: 99%

Photoionization of Ne Atoms and Ne⁺ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Müller

Bernhardt

Borovik

et al. 2017

ApJ

114

View full text Add to dashboard Cite

show abstract

“…The charge state and photoion spectra were studied for Ne [3,49], Ar [4,11,12,[50][51][52][53], Kr [5,6,33,[53][54][55][56], Xe [6,9,16,34,35,46,[57][58][59][60], and for all of them [61][62][63]. Also such spectra were investigated for lanthanides [7-9, 15, 32, 64-66], Mg [50,67], Al, Si, S, Ca, Fe [50], Cu [18], Sr [68], Ba [69], Au [70], Re [71], and Ta [71].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the cascades in atoms using the global characteristics of spectra

Karazija¹,

Kučas²,

Jonauskas³

2004

Lith. J. Phys.

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Dedicated to the 100th anniversary of Professor A. JucysFollowing the creation of inner-shell vacancy in an atom, the cascade of radiative and nonradiative transitions takes place. It can be analysed employing the final charge distribution of ions, the electron and characteristic emission spectra. The development of the experimental and theoretical investigation of cascades is shortly reviewed. The main attention is paid to the description of a cascade using the global characteristics of spectra, especially in the cases of transitions between close-lying and overlapping configurations. Some applications of the global characteristics method are given.

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“…1. The strongest pre-K-edge resonance of neon, corresponding to the 1s-3p transition, is roughly at 867 eV, i.e., only 3 eV below the K-edge at 870.2 eV [20]. The core-excited resonances have a width of only 0.27 eV, determined by the Auger decay, which typically happens on a time scale of 2.4 fs.…”

Section: Summary Of Experimental Resultsmentioning

confidence: 99%

Stimulated resonant x-ray Raman scattering with incoherent radiation

Weninger

Rohringer

2013

Phys. Rev. A

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We present a theoretical study on stimulated electronic Raman scattering in neon by resonant excitation with an x-ray free electron laser (XFEL). This study is in support of the recent experimental demonstration [C. Weninger et al., Phys. Rev. Lett. (to be published)] of stimulated x-ray Raman scattering. Focusing the broadband XFEL pulses into a cell of neon gas at atmospheric pressure a strong inelastic x-ray scattering signal in the forward direction was observed, as the x-ray energy was varied across the region of core-excited Rydberg states and the K edge. The broadband and intrinsically incoherent x-ray pulses from the XFEL lead to a rich, structured line shape of the scattered radiation. We present a generalized Maxwell-Liouville-von Neumann approach to self-consistently solve for the amplification of the scattered radiation along with the time evolution of the density matrix of the atomic and residual ionic system. An in-depth analysis of the evolution of the emission spectra as a function of the Raman gain is presented. Furthermore, we propose the use of statistical methods to obtain high-resolution scattering data beyond the lifetime broadening despite pumping with incoherent x-ray pulses.

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Single-photon multiple ionization of neon in the K-edge region

Cited by 25 publications

References 21 publications

Photoionization of Ne Atoms and Ne⁺ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Photoionization of Ne Atoms and Ne⁺ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Investigation of the cascades in atoms using the global characteristics of spectra

Stimulated resonant x-ray Raman scattering with incoherent radiation

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Single-photon multiple ionization of neon in the K-edge region

Cited by 25 publications

References 21 publications

Photoionization of Ne Atoms and Ne+ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Photoionization of Ne Atoms and Ne+ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Investigation of the cascades in atoms using the global characteristics of spectra

Stimulated resonant x-ray Raman scattering with incoherent radiation

Contact Info

Product

Resources

About

Photoionization of Ne Atoms and Ne⁺ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Photoionization of Ne Atoms and Ne⁺ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections