The neutron total cross sections for Th 232 and U 238 have been measured from about 100 eV to 4 keV with ^0.5 nsec/m resolution at the highest energies. The mean level spacings for these nuclei have been observed to be (17.5±0.7) eV and (17.7±0.7) eV. For U 238 about 17% of the observed levels probably belong to / = 1 and are omitted from the statistical analysis of the data. S-wave strength functions of (0.69±0.07)X10~4 and (0.90=b0.10)X10~~4 are obtained for Th 232 and U 238 , respectively. Detailed comparisons of the observed statistical aspects of the level spacings and neutron reduced width distributions have been made with the predictions of various theoretical models. The distributions of r n° for both nuclei seem to be consistent with a single-channel Porter-Thomas distribution. The observed distributions of nearest-and next-nearest-neighbor level spacings agree quite well with the expected distributions for real symmetric Hamiltonian matrices with randomly distributed matrix elements. The correlation coefficients for Th 232 and U 238 are, respectively: (a) (-0.21db0.07) and (-0.26±0.08) for adjacent level spacings, (b) (-0.03 ±0.07) and (-0.17i0.07) for adjacent reduced neutron widths, and (c) (0.12dz0.07) and (0.15±0.07) for the neutron reduced width of a level and the average of its spacing from adjacent levels.

Discrete values of the parameters (E"gI'",J, I'", etc. ) of the resonances in the reaction 30Zn+ n have been determined from total cross section measurements from a few keV to 380 keV with a nominal resolution of 0.07 ns/m for the highest energy and from capture cross section measurements up to 130 keV using the pulsed neutron time-of-flight technique with a neutron burst width of 5 ns. The cross section data were analyzed to determine the parameters of the resonances using R-matrix multilevel codes. These results have provided values of average quantities as follows: So = (2 01~0.34) S& -(0.56+0.05), S, = (0.2+0.1) in units of 10 ', D, = (5.56~0.43} keV and D, = (1.63~0.14) keV. From these measurements we have also determined the following average radiation

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