<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>3</mml:mn><mml:mi>p</mml:mi></mml:mrow></mml:math>valence photoelectron spectrum of Ar clusters

Hergenhahn, U.; Barth, Silko; Ulrich, Volker; Mucke, Melanie; Joshi, Sanjeev; Lischke, T.; Lindblad, Andreas; Rander, Torbjörn; Öhrwall, Gunnar; Björneholm, Olle

doi:10.1103/physrevb.79.155448

Cited by 13 publications

(22 citation statements)

References 45 publications

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“…12 In an independent experiment, we have therefore determined this quantity from 3s photoelectron spectra taken under expansion conditions relevant to this work. In agreement with our earlier study 9 we find that the mean sizes derived from the photoemission are larger than those from the scaling laws. The agreement is better for larger cluster sizes.…”

Section: Resultssupporting

confidence: 82%

“…As the resolving power of the magnetic bottle spectrometer is E / ⌬E Ϸ 20, these spectra are referred to below as being of "low resolution." An alternative, and probably more accurate, determination of cluster size was made by recording the Ar 3s bulk/surface peak intensity ratio 9,12 with the Scienta analyzer. Spectra shown vs binding energy were calibrated to the ionization energies of the atomic 3p levels, namely, 15.760 and 15.937 eV.…”

Section: Methodsmentioning

confidence: 99%

“…In contrast, the corresponding spectra of rare-gas clusters show broad, partly structured features containing contributions from both the bulk and the surface. [7][8][9][11][12][13] Only in the case of krypton and xenon is the spin-orbit splitting readily apparent. For argon clusters with ͗N͘ = 250 Rolles et al 8 have tentatively fitted the profile of the 1.5 eV broad 3p-derived feature by assuming that there is only one contribution each from surface and bulk atoms and that the 3p 3/2 level is split into its magnetic sublevels m j = Ϯ 3 / 2, Ϯ1 / 2 due to the interaction between neighboring atoms ͑often referred to as a crystal-field splitting͒.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, recent high-resolution core and valence photoelectron studies of rare-gas clusters have allowed surface and bulk contributions to the spectra to be distinguished. [7][8][9] On the basis of the valence band width and the surface vs bulk contribution as a function of Xe cluster size Rolles et al 8 conclude that bulklike electronic band formation occurs for a cluster mean size ͗N͘ above 500. The observation of bulklike electronic bands would imply that the long-range order in the cluster is sufficiently great that the electronic states are defined not only by their energy but also by their crystal momentum.…”

Section: Introductionmentioning

confidence: 99%

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Observation of electronic energy bands in argon clusters

et al. 2010

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The 3p valence region of argon clusters has been investigated with photoemission near the photoionization threshold. A strong feature between 14.6 and 15.3 eV binding energy shows a photon-energy dependence indicative of electronic-energy band dispersion. A similar feature at approximately the same binding energy and with a similar dispersion occurs in photoemission spectra of both the ordered and disordered solids. The effect is already fully developed for scaling-law mean cluster sizes ͗N͘ of approximately 200 atoms, thus showing an early onset of bulklike electronic properties.

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Section: Resultssupporting

confidence: 82%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Observation of electronic energy bands in argon clusters

et al. 2010

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“…In Kr clusters bulk excitons start to appear above N = 200. Similarly, recent high-resolution core and valence photoelectron studies of rare-gas clusters have allowed surface and bulk contributions to the spectra to be distinguished [3][4][5][6][7][8][9]. On the basis of the width of the 5p valence band and the ratio of the surface to bulk contribution as a function of Xe cluster size, Rolles et al [7,8] conclude that bulk-like electronic band formation occurs for a mean size N above 500 (as determined by so-called scaling laws [10]).…”

Section: Introductionmentioning

confidence: 99%

Energy band dispersion in photoemission spectra of argon clusters

Förstel¹,

Mucke²,

Arion³

et al. 2011

Journal of Electron Spectroscopy and Related Phenomena

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Using photoemission we have investigated free argon clusters from a supersonic nozzle expansion in the photon energy range from threshold up to 28 eV. Measurements were performed both at high resolution with a hemispherical electrostatic energy analyser and at lower resolution with a magnetic bottle device. The latter experiments were performed for various mean cluster sizes. In addition to the ≈ 1.5 eV broad 3p-derived valence band seen in previous work, there is a sharper feature at ≈ 15 eV binding energy. Surprisingly for nonoriented clusters, this peak shifts smoothly in binding energy over the narrow photon energy range 15.5 -17.7 eV, indicating energy band dispersion. The onset of this bulk band-like behaviour could be determined from the cluster size dependence.

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Long-Range Interatomic Coulombic Decay in ArXe Clusters: Experiment and Theory

et al. 2016

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We report autoionization channels of Ar inner valence ionized states in mixed ArXe clusters and compare our experimental data obtained by electron–electron coincidence spectroscopy to our theoretical simulations for representative cluster structures. The combined experimental and theoretical data show that the autoionization of Ar 3s–1 in ArXe is dominated by interatomic coulombic decay (ICD) to Xe atoms in the second and higher coordination shells of the originally excited atom. Clusters with a range of sizes, compositions, and structures were probed. The Xe content in the clusters was varied between 10% and 53%. Besides ICD, also electron transfer mediated decay (ETMD(3)) was found important in many of the calculated spectra, although it is seen with less intensity in the experimental spectra. From the calculations, we identify structural motifs in which the ETMD rate is minimized vs the ICD rate and suggest that these are preferentially realized in our experiment, in which clusters are formed by supersonic expansion of an Ar–Xe mixture. Suggested cluster structures either feature a clear segregation between Ar and Xe fractions, e.g., Xe core−Ar shell systems, or contain a few Xe atoms singled out at surface sites on an Ar cluster. These structures differ significantly from the majority of calculated minimum energy structures for ArXe systems of 38 atoms, which might show that the latter, annealed structures are not realized in our experiment. We show experimentally that the relaxation of Ar inner valence states by ICD and ETMD together has an efficiency of unity, within the experimental accuracy, for all clusters probed, except those with the lowest Xe content. The outer valence photoelectron spectra of ArXe are discussed also.

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3pvalence photoelectron spectrum of Ar clusters

Cited by 13 publications

References 45 publications

Observation of electronic energy bands in argon clusters

Observation of electronic energy bands in argon clusters

Energy band dispersion in photoemission spectra of argon clusters

Long-Range Interatomic Coulombic Decay in ArXe Clusters: Experiment and Theory

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