Evidence for nonstatistical population of configurations in Li-like neon following<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Cl</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>→ Ne collisions

Matthews, Dennis L; Fortner, R. J.; Schneider, D.; Moore, C. Fred

doi:10.1103/physreva.14.1561

Cited by 29 publications

(8 citation statements)

References 7 publications

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“…7) support this conclusion. In contrast to this finding Matthews et al [20] reported results from a single collision 45 MeV C113+ on Ne gas experiment, where they observe a strong overpopulation of Li-like Is 2s 2-and ls 2s 2p-states relative to the Is 2p2-configurations. Similar conclusions can be drawn from 56 MeV Ar or 200 MeV Xe on Ne [21,22] data.…”

Section: Klm- Kln- and Hypersatellite-transitionsmentioning

confidence: 54%

EquilibriumK-shell excitation of highly ionized neon

et al. 1979

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Augerelectron emission from foil-excited Ne-ions (6 to l0 MeV beam energy) has been measured. The beam-foil time-of-flight technique has been applied to study electronic transitions of metastable states (delayed spectra) and to determine their lifetimes. To achieve a line identification for the complex structure observed in the prompt spectrum, the spectrum is separated into its isoelectronic parts by an Augerelectron-ion coincidence correlating the emitted electrons and the emitting projectiles of well defined final charge states qI' Well resolved spectra were obtained and the lines could be identified using intermediate coupling Dirac-Fock multiconfiguration calculations. From the total KLL-Augerelectron transition probabilities observed in the electronion coincidence experiment for Ne (10 MeV) the amount of projectiles with one K-hole just behind a C-target can be estimated. For foil-excited Ne-projectiles in contrast to single collision results the comparison of transition intensities for individual lines with calculated transition probabilities yields a statistical population of Li-and Be-like configurations.

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Section: Klm- Kln- and Hypersatellite-transitionsmentioning

confidence: 54%

EquilibriumK-shell excitation of highly ionized neon

et al. 1979

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“…If these measurements were made with a similar technique, we derived a mean value that is given in Table 3. However, the results presented by Matthews et al [70] were obtained with two very different techniques, X-ray emission and Auger electron spectroscopy. We treat these results as independent measurements.…”

Section: Comparison Of Absolute Energy Measurements With Theorymentioning

confidence: 99%

“…The published 1s( 2 S)2s2p( 1 P • ) 2 P • term value at 672.70( 4) eV (7354138(868) cm −1 ) does not fit the positions of levels predicted by Yerokhin et al [5] at 7371805(49) cm −1 and 7372047(45) cm −1 , for J = 1/2 and 3/2 respectively (levels 1o3 and 3o3 in Table A), and is far from other experiments. For the 1s( 2 S)2s2p( 1 P • ) 2 P • term, Wargelin et al [103], Stolterfoht et al [94], Matthews et al [70] and Pospieszczyk [80] gave values 7374100(1600) cm −1 , 7364600(5600) cm −1 , 7369000(12000) cm −1 , 7369000(11000) cm −1 , respectively. Therefore, we have discarded the value of Kádár et al [56] for this term as incorrectly identified.…”

Section: Collection and Evaluation Of Experimental Datamentioning

confidence: 99%

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A Critical Compilation of Experimental Data on the 1s2$l$2$l^{\prime}$ Core-Excited States of Li-like Ions from Carbon to Uranium

Azarov¹,

Kramida²,

Ralchenko³

2022

Preprint

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Recent advance in calculations of energy levels of the 1s2l2l ′ core-excited states for ions along the Li isoelectronic sequence from carbon to uranium suggested that theoretical predictions for the 1s 2 2l-1s2l2l ′ transitions are significantly more precise than most of the experimental results available today and can thus be used for calibrating measured X-ray spectra. This suggestion is verified in the present work by comparison with benchmark experimental results. We present a critical compilation of all available experimental data on the energy levels of the 1s2l2l ′ core-excited states of Li-like ions. The compiled experimental data include uncertainty estimates, which allowed proper weighted averaging and comparison with theoretical calculations. This comparison confirmed the supremacy of the most advanced theoretical calculations of the 1s2l2l ′ levels over the best experimental results available today.

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“…(ls 2p3)SS°-(lsZ 2pZ)aP ~ and (1 s 2s 2p 2) 5pc_ (1 s 2 2s 2p) ap0 transitions at 920.7eV, 914.0eV [11], 895.3eV, 894.3eV [12], 881.0eV and 879.6eV [13] respectively. For increased resolution the crystal and the detector could be moved farther away from the target chamber.…”

Section: Plane Crystal X-ray Spectrometermentioning

confidence: 99%

Radiative and autoionization rates of the metastable 24 P 0 J states in lithiumlike neon

Charalambidis

Koulen

Brenn

1989

Z Phys D - Atoms, Molecules and Clusters

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Atoms.Molecules zo,,0o.r,, and ClustersThe delayed X-ray and electron emission from metastabte states in fast, foil excited neon ions has been investigated. High resolution X-ray and electron spectroscopy at calibrated relative detection efficiencies was applied to determine fluorescence yields for the radiative decay of the (ls2s2p)4Ps °, J = 1/2, 3/2, 5/2 states in NeVIII. Using measured total lifetimes corrected for cascading effects the forbidden radiative and autoionization rates were determined.

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Evidence for nonstatistical population of configurations in Li-like neon followingCl13+→ Ne collisions

Cited by 29 publications

References 7 publications

EquilibriumK-shell excitation of highly ionized neon

EquilibriumK-shell excitation of highly ionized neon

A Critical Compilation of Experimental Data on the 1s2$l$2$l^{\prime}$ Core-Excited States of Li-like Ions from Carbon to Uranium

Radiative and autoionization rates of the metastable 24 P 0 J states in lithiumlike neon

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