Transverse Spin Polarization Research Articles

Observation of integrated state multipoles in collisional excitation of Hg atoms by polarized electrons

Impact excitation of Hg atoms (61 S 0→63 P 1) by polarized electrons from a GaAs source has been studied by measuring the polarization of light emitted by the excited 63 P 1 state. The polarization of light which is related to recently introduced integrated state multipoles for 61 S 0→63 P 1 excitation depends strongly on the transverse spin polarization in the vicinity of resonances near excitation threshold. A description of our GaAs source of polarized electrons is given.

Spin polarization in low-energy electron diffraction: Surface analysis of Pt(111)

Transverse and longitudinal spin polarization components arising in the diffraction of unpolarized low-energy electrons from Pt(111) have been studied as functions of energy and diffraction geometry. Experimental data measured by means of a Mott detector are in good agreement with theoretical results obtained by relativistic LEED calculations. A detailed investigation of the selective sensitivity of the calculated polarization profiles to the surface relaxation δ 12 and to various non-structural model features firstly supports an ion-core potential involving an energy-dependent exchange approximation (by discriminating against two band structure potentials), and secondly establishes the geometry of Pt(111) as unreconstructed with a possible slight outward relaxation of the topmost atomic layer (δ 12 = 0.5% ± 1.0% of the bulk interlayer distance). A surface Debye temperature is found close to the bulk value 230 K.

Transverse spin polarization in odd-mass deformed nuclei

The spin polarization effect on the value of the magnetic parameter b 0 for the K = 1 2 rotational bands and on M1 transitions between low-lying states of odd-mass deformed nuclei is considered. The results of numerical calculations for the ground state rotational band of the 169Tm nucleus are presented.