Auger and x-ray absorption studies of solid molecular oxygen
- Physics Department, Brookhaven National Laboratory, Upton, NY (USA)
- Physics Department, Hunter College of CUNY, New York, NY (USA)
We have studied the x-ray absorption spectrum (XAS) and the Auger electron spectrum (AES) of condensed molecular oxygen in the vicinity of the O 1{ital s} (K) core level. The XAS spectrum, which is similar to that previously reported for gas phase O{sub 2}, has sharp peaks at about 530.8 and 540.3 eV, which we attribute to excitations from the 1{ital s} level into {pi}* and {sigma}* states, respectively. We assign a third peak at 543.3 eV to Rydberg transitions. Compared with gas phase O{sub 2}, the {sigma}* and Rydberg states are shifted to higher energies, an effect that we attribute to solid state effects in the condensed layer. The AES spectra of the ionized molecule and excited molecule are both shifted relative to the spectra of gas phase O{sub 2}, but by different amounts, 10 and 2 eV, respectively, which may be due to different final state screening effects. A tentative assignment of the features in the AES spectra is also made.
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6817153
- Journal Information:
- Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA), Journal Name: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA) Vol. 8:3; ISSN 0734-2101; ISSN JVTAD
- Country of Publication:
- United States
- Language:
- English
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