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$alpha$-$gamma$ ANGULAR CORRELATION MEASUREMENTS ON THE Be$sup 8$ NUCLEUS
Vincent Meyer, Heinz Müller, Hans H. Staub, R. W. Zurmühle
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Abstract
A highly excited Be/sup 8/ nucleus results from the capture of a proton by Li/sup 7/. The excited Be/sup 8/ decays directly to the ground state or to the 2.9-Mev level by emission of gamma . The nucleus can then decay into two gamma particles. It is assumed that these two types of radiation occur concurrently. Since the gamma - alpha angular correlation is strongly dependent on the mixing ratio, the gamma - alpha correlation is suitable for the determination of the mixing. The mixing ratio of the electric quadrupole radiation to the magnetic dipole radiation is 0.017 plus or minus 0.006 at the angles 90, 135, and 180 deg . (J.S.R.)