Inelastic Alpha Scattering and Associated Gamma Radiation. II

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Abstract
The rotational excitation of a deformed nucleus by inelastic alpha scattering gives rise to a gamma-radiation pattern whose orientation, as the alpha angle is varied, sometimes displays a remarkable reverse rotation determined by the relative phase of the excited rotational states. This arises from the motion of beats occuring where the incoming and outgoing waves overlap at the surface of the nucleus, as has been qualitatively explained in previous communications. The nuclear excitation and subsequent radiation are here discussed somewhat more thoroughly, again in the two-dimensional model, with the aim of exploring the essentials of the mechanism and not hiding them in computation.