抄録
Adsorption and desorption processes of potassium on a Si(001) surface were investigated by means of Reflectance Difference Spectroscopy (RDS). When potassium was evaporated at a constant current, we could observe monotonous increase in RD intensity towards saturation both at room temperature and 673 K. No indication of desorption of potassium after evaporation was observed at room temperature. At high temperature of 673 K, almost all the potassium atoms were desorbed after evaporation was stopped. Two step desorption processes occurred corresponding to two different adsorption sites.
