ANGULAR-DISTRIBUTIONS OF HELIUM SATELLITES HE-7)( NL (N=2)

Helium photoelectron satellites He+ nl (n = 2-7) have been studied wit h monochromatized synchrotron radiation. The angular distributions wer e determined in the photon energy range from 80 eV to 603 eV showing, for all of the observed satellites, increasing angular distribution pa rameters beta which converge to beta = 2 at high photon energies. The overall behaviour shows a clear tendency of reduced fractional intensi ty of s-like orbitals for states with higher principal quantum numbers n. In addition, at lower photon energies the satellites with higher n tend to have lower beta-values reflecting the influence of higher ang ular momenta near threshold.