Abstract
Angular distributions and excitation functions were measured for 30 2+ resonances in the39K(p,p0) and39K(p, α0) reactions. Partial reduced widths have been extracted for three proton channels; the relative signs of the reduced width amplitudes for two of these channels were also determined. Reduced widths are generally consistent with a Gaussian distribution for the reduced width amplitudes, but the amplitudes themselves are not. These data represent the first measurement of correlation coefficients in an entrance channel and suggest that the large correlations previously observed in exit channels are generic features of this mass region.
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Work supported by the U.S. Department of Energy, Office of High Energy and Nuclear Physics, under Contracts No. DE-AC05-76ER01067, DE-FG05-88ER40441, and DE-FG05-87ER40353
We wish to thank W.K. Brooks, D. Fang, J.R. Vanhoy, B.W. Smith, L.H. James, K.J. Keeter, S.C. Frankle, and C.M. Frankle for their assistance in performing the experiment.