Abstract
Precision data on transient magnetic fields (TF) in ferromagnetic Gd and Fe were obtained for oxygen ions at velocities between 2 and 8v 0 (v 0=c/137) using the16O(3−) state as probe. At the high velocities the TF in Gd were found to be twice as large as in Fe which is in contrast to the generally observed scaling with the polarization density of the hosts.
Degrees of polarization could be deduced from TF strengths using measured ion fractions of singly occupiedK-shell. The values derived were compared with theoretical estimates based on spin exchange scattering as a possible polarization mechanism.
Similar content being viewed by others
References
Speidel, K.-H.: Ann. Israel Phys. Soc.7, 69 (1984)
Shu, N.K.B., Melnick, D., Brennan, J.M., Semmler, W., Benczer-Koller, N.: Phys. Rev. C21, 1828 (1980)
Häusser, O., Andrews, H.R., Ward, D., Rud, N., Taras, P., Nicole, R., Keinonen, J., Skensved, P., Stager, C.V.: Nucl. Phys. A406, 339 (1983)
Benczer-Koller, N., Hass, M., Sak, J.: Annu. Rev. Nucl. Part. Sci.30, 53 (1980)
Dybdal, K., Forster, J.S., Rud, N.: Phys. Rev. Lett.43, 1711 (1979)
Dybdal, K.: Ph.D. Thesis, Aarhus, 1980 (unpublished)
Speidel, K.-H., Kumbartzki, G.J., Knauer, W., Mertens, V., Tandon, P.N., Gerber, J., Freeman, R.M.: Hyperfine Interact.9, 513 (1981)
Speidel, K.-H., Kumbartzki, G.J., Knauer, W., Mertens, V., Tandon, P.N., Goldberg, M.B., Gerber, J., Freeman, R.M.: Hyperfine Interact.9, 501 (1981)
Becker, A., Holthuizen, A., Rutten, A.J., Engelen, C.P.M. van, Middelkoop, G. van: Hyperfine Interact.11, 279 (1981)
Speidel, K.-H., Tandon, P.N., Mertens, V.: Z. Phys. A — Atoms and Nuclei302, 107 (1981)
Speidel, K.-H., Hagelberg, F., Knopp, M., Trölenberg, W., Neuburger, H., Gerber, J., Dekhissi, H., Tandon, P.N.: Proceedings Proceedings of the International Symposium on three-day in depth review on the nuclear accelerator impact in the interdisciplinary field. Mazzoldi, P., Moschini, G. (eds.), p. 175. Legnaro 1984
Speidel, K.-H.: Proceedings of the Leuven Conference on Nuclear Orientation and Nuclei far from Stability. Hyperfine Interact.22, 305 (1985)
Ajzenberg-Selove, F.: Nucl. Phys. A375, 1 (1982)
Asher, J., Bennett, D.W., Doubt, H.A., Grace, M.A., Moorhouse, T.J., Murphy, B.J.: J. Phys. G10, 1079 (1984)
Scherzer, B.M.U., Bay, H.L., Behrisch, R., Borgesen, P., Roth, J.: Nucl. Instrum. Methods157, 75 (1978)
Ziegler, J.F.: Handbook of stopping cross sections for energetic ions in all elements. Vol. 5. New York: Pergamon 1980
Freier, G., Lampi, E., Sleator, W., Williams, J.H.: Phys. Rev.75, 1345 (1949)
Simonis, H.J., Trölenberg, W., Hagelberg, F., Dekhissi, H., Gerber, J., Knopp, M., Speidel, K.-H.: (to be published)
Goldberg, M.B., Knauer, W., Kumbartzki, G.J., Speidel, K.-H., Adloff, J.C., Gerber, J.: Hyperfine Interact.4, 262 (1978)
Häusser, O. Andrews, H.R., Horn, D., Lone, M.A., Taras, P., Skensved, P., Diamond, R.M., Deleplanque, M.A., Dines, E.L., Macchiavelli, A.O., Stephens, F.S.: Nucl. Phys. A412, 141 (1984)
Marion, J.B., Young, F.C.: Nuclear reaction analysis. Amsterdam: North Holland 1968
Mott, N.F., Massey, H.S.W.: The theory of atomic collisions. p. 542. Oxford: Clarendon Press 1965
Betz, H.D.: Ann. Israel Phys. Soc.1, 255 (1977)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Speidel, K.H., Hagelberg, F., Knopp, M. et al. Strong enhancement of transient magnetic fields in Gd over Fe for oxygen ions at high velocities. Z Phys D - Atoms, Molecules and Clusters 1, 363–372 (1986). https://doi.org/10.1007/BF01431178
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01431178