Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Hadronen und Kerne
HK 7: Nuclear Moments
HK 7.7: Vortrag
Montag, 16. März 1998, 15:45–16:00, E
New perspectives for transient field measurements using amorphous iron-boron compounds + — •A. Gohla1, K.-H. Speidel1, R. Ernst1, U. Grabowy1, B. Heller1, G. Jakob2, and J. Gerber3 — 1Institut f"ur Strahlen- und Kernphysik, Univ. Bonn, Nußallee 14-16, D-53115 Bonn — 2Dept. of Phys., Rutgers Univ., USA — 3Institut de Recherches Subatomique, F-67037 Strasbourg, France
In the context of ion beam induced attenuations of Transient Magnetic Fields (TF) it was found, that ferromagnetic amorphous Fe-B alloys are extremely useful as deteriorating effects by the beam ions on the magnetization and the TF strength accordingly are substantially reduced [1]. This follows from the disordered structure of Fe-B alloys by which the spreading of the perturbation from the ion’s track is more confined than in pure crystalline Fe. For H-like ions like Mg and Si, for which the TF attenuations in Fe are very much pronounced (∼ 80%), the TF strengths could be increased by factors 2-3. For heavier probe ions like 56Fe and 80Se the data are compatible with non-attenuated fields. On the other hand we could show that the strength parameter ’a’ in Fe-B [2] is as large as in pure Fe which demonstrates the over-all superiority of this material for g-factor measurements.
[1] K.-H. Speidel et al., Z. Phys. A358, 389 (1997)
[2] R. Ernst et al., Nucl. Instr. Meth. B, in press + supported by BMBF and DFG