Abstract
Modification and operation of the Van ne Graaff accelerators are reported. The polarization and differential cross sections for neutrons scattered from Be/sup 9/ were measured at five angles for neutron energies from 0.2 to 2.0 Mev. Analysis of the data favors assignments of J/sup pi / = 3- (1 = 2) for the 7.37-Mev level in Be/sup 10/ and J/sup pi / = 21 (1 = 1) for the 7.54- Mev level. A two-stage computer program was developed for the analysis of complex beta spectra comprising up to 13 components. Molecular beam investigations of hyperfine structure in Cr/sup 51/, Cr/sup 53/, Fe/sup 56/, and Fe/sup 57/ were performed. Some nuclear constants for Cr/sup 51/ and Cr/sup 53/ were derived. Some neutron resonances in the kev region of neutron energies were restudied by flat-detection measurements, self-detection measurements, and a ratio method. Neutron cross sections and ratios for Al and Fe/sup 56/ were measured. The 131-kev Fe/sup 56/ level was analyzed; parameters determined for the resonace were smaller than those of other experimenters. The neutron energy spread was 0.65 plus or minus 0.20 kev. A general-purpose computer was programmed to simulate a three-layer random connection network similar to the Perceptron of Rosenblatt. In a learning phase, many different sets of connections were tried, and the most useful ones were kept. In preliminary tests, the system showed significant (but not yet useful) discrimination in a realistic csse. The calculated magnetic moment of the B/sup 11/ ground state was found to be very sensitive to the ground-state wave function. A wave function that gives the experimental moment was constructed by generating from Nilsson wave functions. This function gave a C/sup 11/ magnetic moment in good agreement with preliminary measurements. The existing statistical monel for nuclear energy level partial radiation widths was modified to describe such anomalies as the unexpectedly small fluctuations sometimes reported for U/sup 239/. (auth)
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