The He II alpha photoelectron spectra for ionisation from the 5d subshells of metal atoms in the Hg II, Tl I and Pb II halides have been recorded at two angles to unpolarised photon beams. From these measurements asymmetry parameters beta for the 5d-1 ionisation have been determined. The variation of beta with electron kinetic energy is similar to that observed previously for 5d-1 ionisation of atomic mercury. Differences are attributed to the variation in Z rather than to the molecular environment. The 5d-1 ionisation energy of TlF is shown to be consistent with a simple classical model of chemical shifts.
|Number of pages||6|
|Journal||Journal of Physics B: Atomic and Molecular Physics|
|Publication status||Published - 1984|