Radiohalos in a Radiochronological and Cosmological Perspective

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Science  05 Apr 1974:
Vol. 184, Issue 4132, pp. 62-66
DOI: 10.1126/science.184.4132.62


New photographic evidence, data on halo ring sizes, and x-ray fluorescence analyses provide unambiguous evidence that polonium halos exist as a separate and distinct class apart from uranium halos. Because of the short half-lives of the polonium isotopes involved, it is not clear how polonium halos may be explained on the basis of currently accepted cosmological models of Earth formation.