Correlation of Auger electron spectroscopy and microsynchrotron radiation x-ray photoelectron spectroscopy investigations of Ba-Sc-O desorption on W(100)
Abstract
Thin films of barium and scandium metal were deposited onto W(100) from metal evaporation sources in ultrahigh vacuum. The Ba-Sc-W(100) surface was then exposed to oxygen and heated in stages to several temperatures up to 1400 °C to examine the desorption behavior of these adsorbates. In one case, microsynchrotron radiation x-ray photoelectron spectroscopy (micro-SRXPS) was performed on this surface using a low energy electron microscope. In another experiment, reported here, Auger electron spectroscopy data were collected from the Ba-Sc-O-W(100) surface as a function of heating to temperatures corresponding to the same temperatures used for the micro-SRXPS. Both measurements show that barium desorbs with scandium and oxygen at or below 800 °C.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 04, 2020
- Source ID
- 10.1116/1.5134649
Entities
People
- Calley N. Eads
- Jerzy T Sadowski
- Martin E Kordesch
- Michael V. Mroz
- Samuel Tenney
Organizations
- Brookhaven National Laboratory
- Defense Advanced Research Projects Agency
- Ohio University
- United States Department of Energy