Electron stimulated desorption of the metallic substrate at monolayer coverage [electronic resource] : Sensitive detection via 193 nm laser photoionization of neutral aluminum desorbed from CH{sub 3}O/Al(111).
- Published:
- Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- 9 pages : digital, PDF file
- Additional Creators:
- Argonne National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- A fortuitous overlap between the gain profile of the 193 nm ArF excimer laser and the Al autoionizing transition ²S{sub 1/2} (512753 cm{sup −1}) ← ²P°J has been exploited in the direct observation of substrate metal atoms in an electron simulated desorption (ESD) process from the monolayer adsorbate system CH₃O/Al(111). The identity of the mass 27 photoion was established as Al⁺ by (1) isotopic substitution of ¹³C in the methanol employed for methoxy formation, and (2) tunable laser scans utilizing the ²DJ (J=3/2, 5/2) intermediate levels at ∼32436 cm{sup −1} and a 248 nm ionization step. An ESD yield of ∼×10{sup −6} Al atoms/(electron at 1 keV) was established by comparison with a sputtering experiment in the same apparatus. Velocity distributions measured for the desorbed Al species showed some differences in comparison with methoxy velocity data: a slightly lower peak velocity and a significantly less prominent high-velocity component. 10 refs., 4 figs.
- Report Numbers:
- E 1.99:anl/cp--75386
E 1.99: conf-920462--2
conf-920462--2
anl/cp--75386 - Subject(s):
- Other Subject(s):
- Note:
- Published through SciTech Connect.
07/01/1992.
"anl/cp--75386"
" conf-920462--2"
"DE92014858"
Workshop on desorption induced by electronic transitions,Taos, NM (United States),1-4 Apr 1992.
Young, C.E.; Jones, P.L.; Gruen, D.M.; Pellin, M.J.; Whitten, J.E. - Funding Information:
- W-31109-ENG-38
View MARC record | catkey: 14063894