Abstract
Quality Ge(Li) detectors of large volume make it possible to determine the correlation coefficients in directional correlation studies with an accuracy greater than ever before. In this connection, the corrections to be applied to the experimentally determined coefficients, for various deviations from the ideal case, are examined in detail. Explicit formulae are compiled as extensions to earlier work, for specific application to gamma-gamma directional correlation studies. It is considered that the geometrical attenuation factors for Ge(Li) detectors are best determined experimentally. The collimated beam technique for the experimental determination of the same is investigated with respect to increasing the beam size. Suitable formulae to correct for the beam size effects are also proposed. The case of shielded detector geometries and the peculiarities associated with such applications are illustrated in the investigation with 99Mo.
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