A NEW COMPACT SPIN-RESOLVING AND ANGLE-RESOLVING PHOTOELECTRON SPECTROMETER WITH A HIGH-EFFICIENCY

A portable spin- and angle-resolving photoelectron spectrometer has be en constructed, equipped with a newly developed compact retarding-pote ntial Mott-scattering electron spin polarimeter with an efficiency of 1.9 x 10(-4) for a gold target. Based on Monte Carlo calculations for the spin-dependent electron-scattering process and electron ray-tracin g calculations, a novel design of the retarding-field electron optics with 0.59 sr collection solid angle for scattered electrons has been a ccomplished. Utilizing this spectrometer, the spin- and angle-resolved photo electron spectra have been measured and the spin-dependent elec tronic structure of Ni(110), Ni(110)-p(2 x 1)0 and Ni(110) c(2 x 2)S a long the <(Gamma S)over bar> line of the Ni(110) surface Brillouin zon e have been studied.