In the decay of Co 56 the following quantities have been measured: 7-ray intensities, p-y directional correlation, and fl-(circularly polarized y) correlation. The directional correlation anisotropy was found to be, for fl energies above 300 keV, A z = 0.5___ 0.4 per cent, corresponding to small or vanishing twice forbidden contributions to the allowed decay. The asymmetry parameter A of the B-(circularly polarized y) correlation was measured to be A = --0.01 __+ 0.05 which implies a ratio x between Fermi and GamowTeller contributions to the decay of x= --0.10! 0.07, in agreement with the isospin selection rule. In the decay ofJ TM the following quantities have been measured: shape of the 606 keV fl-ray group, y-ray intensities, conversion coefficients, and fl-(circularly polarized ~) correlations. The measured K/L ratio of the 364 keV y-transition, K/L=6.0+0.2, is compatible with the conversion tables of Sliv and Band only.The nmltipolarities of the 7 rays of 364, 637, and 723 keV were deduced. The 606 keV /3-364 keV 7 cascade was used as a new calibration standard for analysers of circularly polarized y-rays.

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