Angular correlations in compound nucleus decay following the reactions 16O+27Al, 40Ca and 58Ni

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Abstract

Angular correlations have been measured between light particles emitted in compound nucleus decay for different nuclei formed in heavy ion reactions. The reactions used were 16O+27Al at Elab = 50 and 60 MeV, 16O+natCa and 16O+58Ni at 70 MeV. The αα, αp and pp correlations were measured in a plane perpendicular to the beam axis as a function of the relative azimuthal angle. The anisotropies wre around 5:1, 2:1 and 1.2:1 for the αα, αp and pp correlations respectively. Detailed calculations of the αα correlations in the geometry show that the correlation is sensitive to the angular momentum in the entrance channel. The yield for Δø = 180 primarily comes from the high angular momenta whereas the yield at Δø = 90° has contributions from all the angular momenta.

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Present and permanent address: Institute of Modern Physics, Lanchow, P.R. China.

††

Present address: Max-Planck-Institut, Heidelberg, B.R. Germany.

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