Abstract
HAFNIUM-181 decays with a 48 day half-life to a 20-microsecond metastable state1 of tantalum-181. From this, two γ-rays are emitted in cascade, with internal conversion coefficients Ne/(Ne + Nγ) approximately 0·6 and 0·062. We wish to report some measurements on the directional-correlation between these successive conversion electrons.
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De Benedetti, S., and McGowan, F. K., Phys. Rev., 70, 569 (1946).
Bunyan, D. E., Lundby, A., Ward, A. H., and Walker, D., Proc. Phys. Soc., 61, 300 (1948).
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WARD, A., WALKER, D. Directional Correlation between Successive Internal-Conversion Electrons from Tantalum-181*. Nature 163, 168 (1949). https://doi.org/10.1038/163168a0
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DOI: https://doi.org/10.1038/163168a0
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