The 123 keV K, L and M shell particle parameters in 154Gd

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The K, L and M shell particle parameters of the 123 keV transition in 154Gd were carefully measured under five controlled experimental conditions in order to deduce the possible effects which could alter the γ-e and γ-γ directional correlations. The results show that the correlations are sensitive to the preparation, chemical composition and physical environment of the source; and that when careful experimental procedures are employed, the K, L and M shell parameters are found to be normal. An explanation is offered for the contradictory results obtained by other investigators using Eu oxide and Eu chloride sources. © 1972.

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Nuclear Physics, Section A

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