EPJ Web of Conferences
Volume 107, 2016International Conference on Nuclear Structure and Related Topics (NSRT15)
|Number of page(s)||6|
|Section||Nuclear Spectroscopy – Experiment and Theory|
|Published online||19 January 2016|
First observation of the competitive double-gamma (“γγ/γ”) decay process
1 Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
2 Department of Physics, University of Saskatchewan, Saskatoon S7N5E2, Canada
Published online: 19 January 2016
First 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 proceeds at a fraction of 2 × 10−6 by simultaneous emission of two γ quanta instead of one. The observed angular correlation and energy distribution of coincident γ quanta are well described by a dominant M2 – E2 and a minor E3 – M1 contribution to the double-γ decay branch. The data were well accounted for by a calculation using the Quasiparticle Phonon Model.
© Owned by the authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.