Resonant emission spectra of YF3, YCl3,
Y2O3, and Y-metal are observed across Y
LIII absorption threshold. When the incident photon energy is
below the absorption threshold, only Raman scattering component is
observed. The Raman-scattering component has a two-peak structure, main
and subpeaks. Above the absorption threshold, both Raman and normal
Lα emission peaks are observed in insulator ... [Show full abstract] samples.
The intensities of the Raman peak are resonantly enhanced as the
incident photon energy reaches the absorption edge. On the other hand,
in Y metal, only normal Lα emission peak is observed.
Obtained spectra are decomposed into Raman and normal
Lα emission peaks by line-shape analysis. The results
are compared with theoretically calculated ones and are discussed the
relaxation of core-electron excitation processes. The onset energy of
the normal Lα emission peak is estimated and discussed
in relation of the electronic structure of these compounds.