Abstract
The decay of 56 Co to the levels of 56 Fe has been investigated using low-temperature nuclear orientation in the hyperfine magnetic field in iron. Based on the anisotropies of the γ rays, the following spin assignments are established: 4 + (4100.2- and 4298.0-keV levels) and 3 + (4119.8- and 4395.0-keV levels). Multipole mixing ratios of a number of γ transitions are reported. In addition, upper limits of the Fermi to Gamow-Teller matrix element ratios of the two 4 + -4 + electron capture and β + transitions to the 4100.2- and 4289.0-keV levels are obtained.
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