Experiments on the Competitive Double-Gamma (γγ/γ) Decay
Abstract
The recent observation of the competitive double-γ decay process is presented. It is a second-order electromagnetic decay mode. The 662-keV decay transition from the 11/2- isomer of 137Ba to its ground state has been studied. The emission of a single 662-keV γ quantum is a factor of 5 × 105 more likely than the simultaneous emission of two γ quanta instead of one. The observed angular correlation and energy distribution of these rare coincident double-γ quanta are well described by a dominant M2 - E2 and a sub-dominant E3 - M1 contribution to the double-γ decay branch.
- Publication:
-
Journal of Physics Conference Series
- Pub Date:
- July 2018
- DOI:
- 10.1088/1742-6596/1056/1/012045
- Bibcode:
- 2018JPhCS1056a2045P