Calculated polarization after Coulomb excitation in beam-foil interaction

Abstract

The excitation of a hydrogen beam by the shielded Coulomb potentials of the ionic cores of an Au-foil is calculated in first Born approximation for a beam velocity v = 1.4 a.u. Different formation depths of the final 2p term are considered and weighted with the survival probability. Stokes parameters for the emitted light are compared with He (n = 3 ~ 2) transitions. It is demonstrated that the coherence of the excitation by neighbouring target cores tends to reduce the excitation amplitudes for the 2pro states with m:t=0. Adsorbates are estimated to have a considerable effect on the polarization. PACS: 34.50. Fa

Orientation of 1s electrons using tilted foils

“…In these discussions we will not be concerned with the mechanism for the production of the initial orientation by the tilted foil or surface. This has been discussed by a number of authors [41][42][43][44][45][46][47][48][49][50][51]. We will simply assume that the ions emerging from a tilted foil have oriented orbital angular momentum.…”