Research Papers in Physics and Astronomy


Date of this Version

March 1952


Published in Physical Review 85:6 (March 15, 1952), pp. 1038-1039. Copyright ©1952 The American Physical Society. Used by permission. Online at URL:


Although the spectrographic analysis accompanying several enriched samarium isotopes from Oak Ridge contained <0.6 percent europium, some of the more intense internal conversion lines attributed to the disintegration of europium have been found photographically with neutron-activated samarium isotopes in a 180° focusing β-ray spectrograph.

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