The light terbium isotopes a survey of half-lives and γ-ray spectra with the use of mass-separated samples

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Abstract

Gadolinium oxide was bombarded with 65 MeV protons to produce terbium nuclides. Following a chemical separation the terbium fraction was mass separated. The different mass samples were studied for their half-lives. γ-Ray spectra were taken in most cases. New information was found concerning γ-rays of the extremely light isotopes, i.e., 149Tb through 152Tb. 150Tb was discovered for the first time in this research. The results obtained on the remaining isotopes are essentially in agreement with the data reported earlier and summarized in the most recent Table of Isotopes (April 1958).

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Permanent address: The Gustaf Werner Institute for Nuclear Chemistry, University of Uppsala, Uppsala, Sweden.

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