Fast multicharged ion-induced satellite Auger electron angular distributions

Experimental study of coherence and correlation in the anisotropy of NeKL-LLLsatellite Auger decay

“…Accordingly we averaged the ͑␣ 2 ͒ coefficients due to different projectiles and impact energies for each individual transition. The averaged data compared with other experimental results [14] and different theoretical calculations [9,14] are presented in Table IV and Fig. 3.…”

“…The first theoretical descriptions of the anisotropy of Ne KL-LLL satellite Auger transition were based purely on LS coupling ͑⌫ӷ͒, single-configuration Hartree-Fock calculations. These theories cannot describe the anisotropy of the Auger emission quantitatively [11,14,34]. More sophisticated descriptions account for spin-orbit interactions, and the fact that the widths of the individual initial double-vacancy states are often comparable or larger than their energy splitting ͑⌫ജ͒ [35][36][37][38][39][40].…”

“…It was found that the difference between the calculations based on the nonrelativistic LS coupling ͑⌫ӷ͒ and the MCDF method ͑⌫ = 0.2 eV, Ϸ 0.1 eV͒ was significant. However, the uncertainties of the experimental data [11,14,18] did not allow us to arrive at a definite conclusion at that time.…”

“…Later, Kabachnik and his co-workers [9] applied the relativistic MCDF method to treat the anisotropy of Auger emission from overlapping states. Experimentally so far only one measurement [14] has been devoted to study the problem. Since the difference between the nonrelativistic LS coupling and Kabachnik's MCDF calculations is smaller than the uncertainties of the experiment [14], in the present work, we performed more accurate measurements with higher resolution.…”

“…The simultaneous 1s and 2p ionization of Ne has been studied both by electron [11] and heavy charged particle impact [10,[12][13][14], observing basically no alignment in the former case and strong anisotropy in the latter. The strong anisotropy in the proton impact measurement of [10] allowed us to study the details of the double ionization process of Ne.…”