The internal conversion electron spectra of neutron-activated enriched tellurium isotopes have been studied. It has been shown that each odd mass-number isotope from 121 to 131 exists in a long-lived isomeric state. In all cases the initial isomeric transition is 2⁴-pole magnetic, which appears to identify the long-lived isomeric states with a spin of 11/2. The spins of the ground states of Te¹²⁷, Te¹²⁹, Te¹³¹ would appear to be 3/2, and that of Te¹²³ 1/2. Information about Te¹²¹ and Te¹²⁵ ground states is incomplete.
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R. D. Hill (1949) studied this question.
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