Angular distributions of Auger electrons ejected in 60-keV ${\mathrm{C}}^{6+}$+He collisions were measured. This study extends previous work where cross sections for the production of the configuration 2lnl’ (n≥3) have been determined from measurements at the observation angle of 0° only. For n=3 and 4, the present angular distributions were measured to be anisotropic, whereas for n=5 and 6 the electron emissions were found to be isotropic within the experimental uncertainties. The integration over the observation angle yields total production cross sections ${\mathrm{\sigma }}_{2\mathit{l}\mathit{n}\mathit{l}}$ that were found to follow an ${\mathit{n}}^{\mathrm{-}3}$ law, in agreement with previous calculations. The observed angular distributions are discussed in terms of different capture mechanisms.

• Received 19 December 1991

DOI:https://doi.org/10.1103/PhysRevA.46.222