"Observation of latent heavy-ion tracks in GeS by transmission electron microscopy" R. Scholz, S. Hopfe, J. Vetter Rad. Eff. Def. Solids 126 (1993) 275-278.

Description:

Cross-section of the ion track of a high-energy uranium ion in germanium sulfide, recorded using a transmission electron microscope. The elliptical form, with axis lengths 21.8 and 15.0 millionths of a millimeter (nm), is a result of the anisotropy of the crystal. The four "butterfly-like" structures in the picture show the stress created in the crystal lattice by the track.

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