Abstract

The yield has been determined for the excitation of 180gTa ( J π=1 +) from the 181Ta(γ,n) reaction by measurements of γ rays emitted following the electron capture and β-decays of the 8.15 h ground state. The probability σ m/( σ m+ σ g) for the production of the 180mTa isomer ( J π=9 −) after γ absorption in the energy region from 8 to 13 MeV was deduced. The role of the initial and final spins on the reaction yield, along with the relevance for nucleosynthesis of 180mTa, is discussed.

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