Now showing items 31-34 of 34
A polarized helium ion beam for surface electronic structure studies
This thesis describes the development of a spinpolarized He+ ion beam suitable for use as a- probe of surface electronic structure of metals. The method would represent an extension of ion neutralization spectroscopy (INS), ...
A spin-polarized He (2³S₁) metastable atom source for surface research
Surface science has a paucity of probes, particularly for spin-dependent studies. This thesis describes a 2 3S1 He probe, recently developed in this laboratory, that can be used for such investigations. There are three ...
Electron spin polarization in low energy electron diffraction
Substantial electron spin polarization has been observed in low energy electron diffraction (LEED) from the (1) surface of tungsten. The electron polarization is determined by directing a fraction of the elastically ...
Extraction of a helium ion beam from an optically polarized helium source gas
Optical pumping techniques can be used to produce nuclear polarization in He3 gas excited by a weak electric discharge. By optically polarizing He3 to a polarization P0 and extracting ions from the gas, the resulting ion ...