First observation of the competitive double-gamma (γγ/γ) decay process

  • First observation of the competitive double-γ decay process is presented. It is a second-order electromagnetic decay mode. The 662-keV transition from the 11/2− isomer of 137Ba to its ground state proceeds at a fraction of 2 x 10−6 by simultaneous emission of two γ quanta instead of one. The angular correlation and energy distribution of coincident γ quanta are reproduced by a dominant M2-E2 and a minor E3-M1 contribution to the double-γ decay branch. The data are well accounted for by a calculation in the Quasiparticle Phonon Model.
Metadaten
Author:Norbert PietrallaORCiDGND, Christopher WalzGND, Heiko ScheitORCiDGND, Thomas AumannORCiDGND, Ronan Lefol, V. Yu. PonomarevGND
URN:urn:nbn:de:hebis:30:3-631771
DOI:https://doi.org/10.1088/1742-6596/724/1/012039
ISSN:1742-6596
Parent Title (English):Journal of physics. Conference Series
Publisher:IOP Publ.
Place of publication:Bristol
Document Type:Article
Language:English
Date of Publication (online):2016/06/01
Date of first Publication:2016/06/01
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2022/10/27
Volume:724
Issue:art. 012039
Article Number:012039
Page Number:7
Note:
Our research was supported by the DFG having funded the LaBr detectors within the grant SFB 634 at TU Darmstadt. It was partially funded also by HIC for FAIR within the LOEWE initiative of the State of Hesse.
HeBIS-PPN:505128187
Institutes:Forschungscluster / ELEMENTS
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung 3.0