2037strahlung measurement 16 is not correct and that the value of 0.89 Mev determined from the Fe 57 (^)Co 57 reaction 17 should be adopted. Mn 57 DecayThe decay of this nucleus to the §-second-excited state and the f -third-excited state establishes Mn 57 to be f -or f-. From the coupling behavior of individual nucleons in the (/7/2)~3 configuration found in neighboring nuclei, the higher spin is considered to be more probable. The log// values for the various decay * Work performed under the auspices of the U. S. Air Force and U. S. Atomic Energy Commission.The gamma-ray cascades which follow thermal neutron capture in chromium have been investigated by means of the measurement of coincidences between gamma rays detected by a three-crystal pair spectrometer and a single Nal crystal. Samples of normal chromium and chromium enriched in Cr 50 and Cr 53 were used. The following assignments of gamma rays to individual isotopes have been made. 4.83 Mev. A number of features of the de-excitation of the energy levels populated by these transitions are established.

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The y-angular correlation of osmium is measured after Coulomb-excitation with 30 MeV 160 ions. The recoiling nuclei are implanted into a magnetized iron substrate. The fit of the perturbated angular correlation gives the value B=--800-1-200 kG for the internal field at the sites of osmium atoms dissolved in an iron host.