Detailed analysis of the 3d(-1)-> 4p pi(-2) normal Auger spectra in HBr and DBr

High-resolution Br MVV Anger spectra of HBr and DBr have been recorded usin g monochromatized synchrotron radiation. We present a detailed analysis and reassignment of the spectra in the 3d(-1)-->4p pi(-2) region. This part of the spectra exhibits the spin-orbit and ligand-field splitting of the 3d(- 1) con-hole states and a vibrational structure of the final states influenc ed by vibrational lifetime interference. The equilibrium distances and the vibrational energies of the final states (1)Sigma(+), (1)Delta, and (3)Sigm a(-) are derived from the intensity distribution of the vibrational substat es. From the shape of the peaks identified as transitions to the, (3)Sigma( -) state a splitting of congruent to 50 meV between the components (3)Sigma (0)(-) and (3)Sigma(1)(-); is concluded. Agreement between the experimental spectra and fitted results for both HBr and DBr is very satisfactory. [S10 50-2947(99)08406-1].