Abstract
The directional correlations for the 174 keV-beta and the 208 keV-gamma cascade and for the 384 keV-beta and the 113 keV-gamma cascade in the decay of Lu177 have been measured as a function of the energy of the beta-particles. A magnetic lens spectrometer was used to select the energy of the beta-rays. For the first cascade the observed correlation is isotropic. For the 384 keV-beta and the 113 keV-gamma cascade, the anisotropy factorA 2(W) in the beta-gamma directional correlation\(W_{\beta _\gamma } (\vartheta ,W) = 1 + A_2 (W)P_2 (\cos \vartheta )\) is proportional toP 2/W and its value isA 2 (1.48)=+0.0575±0.0068. The analysis of the data shows that theξ-approximation for first-forbidden nonunique beta transitions represents the results of the 384 keV-beta and the 113 keV-gamma cascade in a very satisfactory manner.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
On leave from the Atomic Energy Establishment, Cairo, Egypt.
We express our sincere gratitude to the director of this institute, ProfessorKai Siegbahn, for the excellent research facilities provided.
Rights and permissions
About this article
Cite this article
El-Nesr, M.S., Bashandy, E. Energy dependence of beta-gamma directional correlation in the decay of Lu177 . Z. Physik 167, 100–110 (1962). https://doi.org/10.1007/BF02144657
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02144657