S. Kremeyer et al., HYPERFINE INTERACTION STUDIES ON SWIFT O-IONS EMERGING WITH POLARIZEDELECTRONS FROM FERROMAGNETIC LAYERS INTO VACUUM, ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 348(1), 1994, pp. 49-56
A precision plunger set-up was used to determine in time-differential
measurements of hyperfine interactions the degree of polarization of 1
s- and 2s-electrons in H- and Li-like oxygen ions on their emergence f
rom magnetized Ni- and Gd-layers into vacuum. In addition a time-integ
ral measurement with Fe-layers served to obtain the polarization of 2s
-electrons only. For all three ferromagnetic materials the degree of p
olarization of 2s-electrons is found to be twice as large as for Is-el
ectrons. The data are discussed in the context of transient magnetic f
ields and their underlying polarization mechanism