Abstract
The low-lying energy levels of 59Co have been investigated by Coulomb excitation with 36 MeV oxygen ions. Reduced transition probabilities were determined from the singles yields, spins and mixing ratios from particle-gamma angular correlations and the excited state mean lives from the Doppler shifts of gamma rays as observed by a Ge(Li) detector. The levels at 1097, 1189 and 1458 keV are strongly excited. Inelastic deuteron scattering, in addition, reveals levels at 1479 and 1743 keV. The following quantities were determined: The 1097 keV level J π = 3 2 −, B( E2)↑ = 0.0005 ( units of e 2 × 10 −48 cm 4, τ > 4.2 ps . The 1189 keV level: J π = 9 2 − (J π = 7 2 − not definitely excluded) B(E2)↑ = 0.022, τ = 0.08±0.01 ps. The 1458 keV level: J π = 11 2 − ( 5 2 −), B( E2)↑ = 0.012, τ = 1.6±0.4 ps . An appendix gives general methods for the treatment of Doppler shift data from Coulomb excitation.
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