APS » PROLA » Phys. Rev. Lett. » Volume 79 » Issue 23

Phys. Rev. Lett. 79, 4538 - 4541 (1997)

Evidence for Transient Electric Field Gradients in H-like Ions Traversing Gd Targets at High Velocities

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U. Grabowy1, K.-H. Speidel1, J. Cub2, H. Busch1, H.-J. Wollersheim2, G. Jakob3, A. Gohla1, J. Gerber4, and M. Loewe5
1Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, D—53115 Bonn, Germany
2Gesellschaft für Schwerionenforschung, Postfach 110552, D-64220 Darmstadt, Germany
3Physik-Dept. Technische Universität München, James-Franck-Str., D-85748 Garching, Germany
4Institut de Recherches Subatomique, F-67037 Strasbourg, France
5Sektion Physik Ludwig-Maximilians-Universität München, D-85748 Garching, Germany

Received 23 May 1997

Transient electric field gradients have been observed in measurements of particle-γ-angular correlations of Coulomb excited nuclei in H-like ions during traversal through thick metallic layers. The VZZ values deduced for 20Ne(2+), 32S(2+), 40Ar(2+), 52Cr(2+), 54Fe(2+), and 62Ni(2+) are found to be of the order of 1021 V/cm2 with consistently positive sign. They arise from distortions of the 1s electron orbit of the H-like ions by the wake field gradient induced in the solid by the charge of the moving ion. The observed interaction frequencies reflect the sign of the quadrupole moment of the excited 2+ states.


©1997 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v79/p4538
DOI: 10.1103/PhysRevLett.79.4538
PACS: 21.10.Ky, 23.20.En, 24.70.+s, 61.80.-x

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