Derivative spectra of very low energy photoelectrons from CO/Cu(001) surface obtained by a lock-in technique

Kei Hayashi, Ryuichi Arafune, Shigenori Ueda, Yoichi Uehara, Sukekatsu Ushioda

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We have constructed a system for measuring the derivative spectra of very low energy photoelectrons using a lock-in technique. The main advantage of this system lies in determining the energy position of steps in the photoelectron spectra that arise from inelastic scattering of photoelectrons through the excitation of surface vibrational modes. With this system we have measured the derivative spectra of two isotopes, 12C16O and 13C18O adsorbed on Cu(001), and observed the small isotopic shift of ∼1 meV. This result demonstrates that one can precisely determine the vibrational energy of surface adsorbates by using the present measurement system.

Original languageEnglish
Article number104303
Journaljournal of the physical society of japan
Volume75
Issue number10
DOIs
Publication statusPublished - 2006 Oct 1

Keywords

  • Lock-in technique
  • Molecular-adsorbed metal surface
  • Very low energy photoelectron spectroscopy
  • Vibrational mode

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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