The neutron capture cross section of 141Pr has been measured with 0·2% energy resolution from 2·5 to 200 keY. Resonance parameters are given from 2·6 to 13·3 keY. The average s-wave radiative width is 88 meY, with a standard deviation of 27 meY. The s-wave reduced neutron widths and the corresponding radiative widths are not correlated, but the standard deviation of the s-wave radiative widths greatly exceeds that predicted by the statistical model.

The results of two y-y correlation measurements following the thermal capture of neutrons in 57Pe are presented. The spin of the 1'725 MeV state is found to be 3/2-and that of the 1·627 MeV state to be 3/2-(5/2-). The mixing ratios for the decay of the two states have been calculated.

The level structure in 91Zr has been investigated by Cohen and Chubinsky (1963) with the 90Zr (d, p)91Zr reaction. They noted some 14 levels up to an excitation energy of 3·9 MeV. All these states were found to have positive parity and their structure is fairly well understood in terms of coupling a single-particle neutron to the ground state and the first two excited states of 90Zr (Ramavataram 1964). A study of the isobaric analogues of the 9lZr states with the 90Zr(p, pO)90Zr reaction was carried out by Moore (1964). His results were in agreement with those of Cohen and Chubinsky (1963) except that he did not see the analogue of the 1·48 MeV level in 91Z1'.

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