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NIST X-ray Photoelectron Spectroscopy Database (SRD 20), Version 5.0
Reliable, with two-point correction of energy scale
Comment:
1 - 1.0E6 L O2/Ho. The sample was cleaned by Ar+ ion bombardment (j = 60 microamperes cm-2) and subsequently annealed. Emission angles = 20 and 50 degrees.