High‐Resolution Angle‐Resolved Photoelectron Spectroscopy of Cu5− Clusters

Abstract

Angle‐resolved photoelectron spectroscopy (ARPES) has been used to probe the electronic and vibrational structure of the Cu5− cluster. High‐resolution spectra recorded near the detachment threshold reveal well‐resolved vibrational progressions, enabling a precise determination of the adiabatic electron affinity (EA = 1.8947(12) eV). Measured vibrational frequencies are in good agreement with density‐functional‐theory predictions, allowing the assignment of the observed modes. The anisotropy parameter β of the photoelectron angular distribution from the highest occupied molecular orbital follows the universal momentum‐dependent behaviour recently predicted. In some cases β exhibits a dependence on the final vibrational excitation of the cluster which deviates from the prediction, revealing a possible influence of autoionizing excited states.

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BibTeX RIS

BibTeX

@article{weise2026highresolution,
  title = {{High‐Resolution Angle‐Resolved Photoelectron Spectroscopy of Cu5− Clusters}},
  author = {Lukas Weise and Steve Takouan Tchounga and Bernd von Issendorff},
  journal = {Chemphyschem},
  year = {2026},
  month = oct,
  doi = {10.1002/cphc.70605},
  url = {https://doi.org/10.1002/cphc.70605},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - High‐Resolution Angle‐Resolved Photoelectron Spectroscopy of Cu5− Clusters
AU  - Lukas Weise
AU  - Steve Takouan Tchounga
AU  - Bernd von Issendorff
PY  - 2026
DA  - 2026/10/01
JO  - Chemphyschem
DO  - 10.1002/cphc.70605
UR  - https://doi.org/10.1002/cphc.70605
AB  - Angle‐resolved photoelectron spectroscopy (ARPES) has been used to probe the electronic and vibrational structure of the Cu5− cluster. High‐resolution spectra recorded near the detachment threshold reveal well‐resolved vibrational progressions, enabling a precise determination of the adiabatic electron affinity (EA = 1.8947(12) eV). Measured vibrational frequencies are in good agreement with density‐functional‐theory predictions, allowing the assignment of the observed modes. The anisotropy parameter β of the photoelectron angular distribution from the highest occupied molecular orbital follows the universal momentum‐dependent behaviour recently predicted. In some cases β exhibits a dependence on the final vibrational excitation of the cluster which deviates from the prediction, revealing a possible influence of autoionizing excited states.
SN  - 1439-4235
SN  - 1439-7641
ER  -

Abstract

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