Evaporation and thermionic emission processes of Pb/W(110) imaged in situ by emission electron microscopy

Hirokazu Fikidome, Masamichi Yoshimura, Kazuyuki Ueda

Research output: Contribution to journalArticle

Abstract

Evaporation and thermionic emission processes of Pb/W(110) have been studied in situ by emission electron microscopy (EEM). By the photoemitted EEM, the evaporation of Pb except the first layer has been observed In situ at 603-673 K, resulting in an increase in the work function that prevents photoemission of electrons. By heating to 1200 K, the surface can be again imaged by EEM even without illumination, i.e., thermionic emission electron microscopy (TEEM). This TEEM observation at lower temperatures than usual becomes possible owing to thermionic emission assisted by the electric field between the objective lens and the surface.

Original languageEnglish
Pages (from-to)70-72
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number1 A
DOIs
Publication statusPublished - 2006 Jan 10
Externally publishedYes

Keywords

  • Evaporation
  • Pb
  • Photoemission electron microcopy
  • Thermionic emission electron microscopy
  • Tungsten

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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