Photon stimulated desorption from finely polished metals irradiated with synchrotron radiation

Photon-stimulated desorption (PSD) from electrolytic-abrasively polished stainless steel, copper, and titanium was evaluated using synchrotron radiation (SR) in the spectral range of 1-7 A. Typical desorption yield of the finely polished samples, measured with the throughput method, ranges from 2 x 10-4 to 5 x 10-4 molecules/photon with desorption species of H2, CO and CO2. The difference in yields among the materials was quite small after considerable irradiation. We also found that the yields of electrolytically and electrolytic-abrasively polished stainless steel are almost the same, except for in the initial period of irradiation. This similarity was consistent with the result of surface inspection with XPS. (author)