Ultrahigh Vacuum System for Use with a Polarizing Spectrometer

An ultrahigh vacuum system which can be used in conjunction with a commercial polarizing spectrometer is described. The capabilities of the combined systems are such that surfaces can be prepared and observed in situ on substrates held at temperatures anywhere between liquid nitrogen and about 800°C. In addition, it is possible to introduce a variety of gases by means of a controlled leak, permitting the study of many different interfacial phenomena and the kinetics of the reactions involved. Preliminary data on evaporated copper is shown which is essentially different than previously reported results even though the data shown here were taken from samples purposely held at only modestly improved pressures.