Spectra of X-Ray Absorption in the $K$ Shell of Si in Gaseous Si${\mathrm{Cl}}_4$ and in the $L$ Shell of Ge in Gaseous Ge${\mathrm{Cl}}_4$

The $K$ absorption spectrum of Si in Si${\mathrm{Cl}}_4$ gas and the $L$ absorption spectrum of Ge in Ge${\mathrm{Cl}}_4$ gas were measured using a two-crystal vacuum spectrometer with potassium acid phthalate crystals. The Si $K$ absorption spectrum has fine structure quite similar to that of the well-known Ge $K$ absorption spectrum of Ge${\mathrm{Cl}}_4$ gas. From the fine structure of the Ge $L$ absorption spectrum it can be concluded that bound-ejected-electron states of several symmetries exist in the Ge${\mathrm{Cl}}_4$ gas molecule.