The utility of the (~so, a~ reaction at small angles for the mass determination of highly neutron rich nuclei is demonstrated by a determination of the mass excess of 62Fe as (-58.946_+0.022) MeV and of 6SNi as (-63.466_+0.028) MeV. An excited state of 62Fe is observed at 0.875 MeV.

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Accurate, confirmed mass excess values have been determined for the nuclei 6o, 6ZFe ' 68Ni, 69Cu, and 73, 75Ga by the Q-value method. The mass of 74Zn requires further study. Good agreement was found between experimentally determined mass values and those from mass model predictions.

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The specific heat of ammonia is calculated in the temperature range from 0°C to 150°C. The effect of the anharmonicity of the 948 cm—1 vibration on the specific heat is very noticeable. Small corrections due to the stretching of the molecule by centrifugal force and the interaction of vibration and rotation are taken into account. The results are in good agreement with measurements of Osborne, Stimson, Sligh and Cragoe.