Low-Lying Levels of ⁵⁸Co

Abstract

The odd–odd nucleus 58 Co has been investigated experimentally by the 59 Co(d,t) 58 Co and the 55 Mn(α,nγ) 58 Co reactions. In the pickup studies deuteron energies of 15 and 16.5 MeV were used and levels at 0, 25, 52, 112, 365, 375, 456, 888, 1043, and 1078 keV were observed. DWBA analysis showed mixed l n = 1 and 3 transfers for all levels except the last named, which is pure l n = 3. High resolution gamma–gamma coincidence work using the (α,nγ) reaction has revealed the decay properties of a large number of levels up to 1.5 MeV, including all those seen in (d,t), and has allowed tentative spin assignments for a comparison with the theoretical calculations of Vervier. Qualitatively the agreement is good.