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Abstract. Ion-beam induced attenuations of transient magnetic fields have been further studied in measurements on high-velocity 24Mg-and 28Si-ions as well as low-velocity 4STi-ions using energetic beams of Ti-and Br-ions. Further evidence for the stopping power dependence of the attenuations is found; more data in the threshold region of Fe-host support earlier observations. In Gd-host the attenuations are again weaker pronounced than in Fe in accordance with previous data.

Abstraet.A precision plunger set-up was used to determine in time-differential measurements of hyperfine interactions the degree of polarization of Is-and 2s-electrons in H-and Li-like oxygen ions on their emergence from magnetized Ni-and Gd-layers into vacuum. In addition a time-integral measurement with Fe-layers served to obtain the polarization of 2s-electrons only. For all three ferromagnetic materials the degree of polarization of 2s-electrons is found to be twice as large as for Is-electrons. The data are discussed in the context of transient magnetic fields and their underlying polarization mechanism.