Optical and spin-selective time-of-flight measurement of light-induced desorption of Rb from Fe[Formula: see text]O[Formula: see text] surfaces.

Light-induced desorption of Rb atoms from a ferrimagnetic Fe[Formula: see text]O[Formula: see text](001) surface was studied using a spin-selective optical method, which provides information on the spin polarization, velocity distribution, and amount of the desorbed atoms. The results showed that the intensity of the desorption of Rb from Fe[Formula: see text]O[Formula: see text](001) induced by ultraviolet (UV) light irradiation was smaller than the detection limit at coverages lower than the threshold coverage at which the desorption rate began to increase. Moreover, the average magnetic quantum number of the desorbed atoms was smaller than that of electrons at the Fermi level of the Fe[Formula: see text]O[Formula: see text](001) surface. These indicate that the light-induced desorption of Rb from an Fe[Formula: see text]O[Formula: see text](001) surface occurs only in the high-coverage region in which the desorbing atoms are not in contact with the Fe[Formula: see text]O[Formula: see text] surface, and that the desorption does not involve spin transfer.

Apparatus for time-resolved and energy-resolved measurement of internal conversion electron emission induced by nuclear resonant excitation with synchrotron radiation.

A high-energy and large-object-spot type cylindrical mirror analyzer (CMA) was constructed with the aid of electron trajectory simulations. By adopting a particular shape for the outer cylinder, an energy resolution of 7% was achieved without guide rings as used in conventional CMAs. Combined with an avalanche photodiode as an electron detector, the K-shell internal conversion electrons were successfully measured under irradiation of synchrotron radiation at 14.4 keV in an energy-resolved and time-resolved manner.