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  • Access by Xinjiang University

Alpha-Emitting Isomeric State of Tb149

Ronald D. Macfarlane

  • Lawrence Radiation Laboratory, University of California, Berkeley, California

Phys. Rev. 126, 274 – Published 1 April, 1962

DOI: https://doi.org/10.1103/PhysRev.126.274

Abstract

Bombardment of La139 targets with 80- to 140-Mev O16 ions has resulted in the identification of a new alpha activity decaying with a half-life of 4.3±0.2 min and an alpha-particle energy of 3.99±0.03 Mev. Subsequent experiments have established that the activity is due to an isomeric state of Tb149. It is proposed that the isomerism due to the filling of an h112 proton state for the spherical Tb isotopes.

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