X-ray photoelectron spectroscopy of uv laser irradiated sapphire and alumina Pedraza, A. J. ; Park, J. W. ; Meyer, H. M., III ; Braski, D. N. Abstract Publication: Journal of Materials Research Pub Date: September 1994 DOI: 10.1557/JMR.1994.2251 Bibcode: 1994JMatR...9.2251P