High resolution threshold photoelectron spectroscopy of rare gas dimers

Hall, R. I.; Lü, Ying; Morioka, Y; Matsui, Takashi; Tanaka, Tomoaki; Yoshii, H.; Hayaishi, T; Ito, Kenji

doi:10.1088/0953-4075/28/12/012

Cited by 55 publications

(45 citation statements)

References 28 publications

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“…In early theoretical work [12,13] it was concluded that this state is repulsive. More recent ab initio studies find a dissociation energy D 0 = 202 cm À1 [16] or 103 cm À1 [17], much smaller than the experimental value of %600 cm À1 [20,22].…”

Section: Introductionmentioning

confidence: 65%

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On the role of the II(1/2g) state in spontaneous dissociation of krypton and xenon dimer ions

Fedor

Echt

Głuch

et al. 2007

Chemical Physics Letters

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We have measured kinetic-energy-release distributions (KERD) for spontaneous dissociation of electronically excited dimer ions of krypton and xenon, formed by electron impact ionization of neutral precursors. The data cannot be reconciled by decay of the strongly bound II(1/2u) state that successfully explains dissociation of Ne þ 2 and Ar þ 2 . Instead, the KERD is dominated by contributions from the weakly bound II(1/2g) state that has so far escaped a convincing experimental characterization. The present data can be utilized to assess the accuracy of ab initio potential energy curves of this state.

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Section: Introductionmentioning

confidence: 65%

“…1. Moreover, a rich body of experimental data has been obtained [18], most recently by high-resolution threshold photoelectron spectroscopy [4,[19][20][21][22][23][24]. There is good agreement between ab initio calculations and experimental data with one notable exception, the II(1/2g) state of Kr þ 2 .…”

Section: Introductionmentioning

confidence: 99%

On the role of the II(1/2g) state in spontaneous dissociation of krypton and xenon dimer ions

Fedor

Echt

Głuch

et al. 2007

Chemical Physics Letters

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“…Moreover it fulfils the condition E cr ≤ D 0 , where D 0 = (1.291 ± 0.010) eV [18] is the dissociation energy of the molecular ion Ne + 2 in its ground electronic state.…”

Section: Resultsmentioning

confidence: 92%

Temperature Effects on Dissociative Recombination in Neon

Urbanowicz¹,

Biełski²,

Lisak³

et al. 2011

Acta Phys. Pol. A

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Using an interferometric method, detailed analysis of the line shapes of the self-broadened 748.8 nm Ne line emitted from the glow discharge at low pressure of neon was performed in wide temperature range. Systematic departures from the ordinary Voigt profile were observed. We have shown that the dissociative recombination of molecular Ne + 2 ions which gives rise to the non-thermalized neon atoms may be regarded as the main process responsible for the distortion of the profile of the investigated line.

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“…Spectroscopic fits to the microwave data are nevertheless possible for several slightly different quantum number assignments near dissociation. In the present work, this was resolved for the u states by including the e value of Kim et al 10 and the e x e value of Hall et al 9 in preliminary fits. This provided a number of possible vibrational assignments for the u-state levels for both ⍀ϭ1/2 and ⍀ϭ3/2.…”

Section: The Least-squares Fit Of the Interaction Potentialmentioning

confidence: 91%

“…Long-range states of neutral diatomic molecules are important in many contexts, including the photoassociation of laser-cooled atoms; 4 this is particularly topical because of the recent observation of photoassociation in a Bose-Einstein condensate, producing ultracold molecules in states near dissociation. 5 There have been a number of previous experimental investigations of the Ne 2 ϩ ion, principally in its ground electronic state, as listed in Table I 9 7.42 Ϯ0.16 cm Ϫ1 , is probably the more reliable because they observed many more vibrational levels.…”

Section: Introductionmentioning

confidence: 99%

Microwave electronic spectrum of the Ne⋯Ne+ long-range complex: The interaction potential

Carrington

Gammie

Page

et al. 2002

The Journal of Chemical Physics

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. The full interaction potential between Ne( 1 S) and Ne ϩ ( 2 P) is determined by least-squares fitting of potential parameters to spectroscopic data, principally from the near-dissociation microwave spectra of the Ne 2 ϩ complex. The potential obtained in this way incorporates the potential curves for all six electronic states correlating with Ne( 1 S)ϩNe ϩ ( 2 P) and the couplings between them. Coupled-channel calculations on the potential take account of breakdown of the Born-Oppenheimer approximation and provide an accurate description of the microwave rovibronic spectrum involving levels within ϳ10 cm Ϫ1 of the first dissociation limit. The Ne 2 ϩ ions are both vibrationally and rotationally hot: the spectrum involves levels up to at least Jϭ25/2 and there is evidence for transitions involving levels near the second dissociation limit. The long-range levels involved have ͗r͘ up to 12 Å, compared with an equilibrium bond length of 1.756 Å for the ground electronic state. The long-range parameters of the interaction can be extracted from the fit and are compared with recent theoretical values.

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High resolution threshold photoelectron spectroscopy of rare gas dimers

Cited by 55 publications

References 28 publications

On the role of the II(1/2g) state in spontaneous dissociation of krypton and xenon dimer ions

On the role of the II(1/2g) state in spontaneous dissociation of krypton and xenon dimer ions

Temperature Effects on Dissociative Recombination in Neon

Microwave electronic spectrum of the Ne⋯Ne+ long-range complex: The interaction potential

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