INELASTIC EFFECTS CLOSE TO THE ROUGHENING TRANSITION OF AG(110)

In this paper we present a preliminary study of the effects of surface vibrations on determining the Ag(110) roughening temperature. Data we re collected along the <001> direction and in the out-of-phase conditi on by means of time-of-flight resolved He atom scattering. Careful ana lysis of the experiments! results in the high sample temperature range , similar to 900 K, shows the strong dependence of the roughening temp erature on the time window used to construct the angular profiles from the measured spectra. The present study points out that only an appro ximate and lower limit for the transition temperature can be establish ed with no energy selection of the scattered intensity.