| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8172501 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2015 | 8 Pages |
Abstract
Evaluation of single, coincidence and anticoincidence gamma-ray spectrometry methods has been carried out with the aim to search for double-electron capture of 74Se to excited states. This process is unique, because there is probability for transition to the 2+ excited state in 74Ge (1204Â keV), and de-excitation through two gamma-quanta cascade with energies of 595.9Â keV and 608.4Â keV. Long-term measurements with an anticosmic shielded HPGe (high purity Ge) spectrometer and a coincidence HPGe-NaI(Tl) spectrometer did not show any evidence for the double-electron capture in 74Se. The best limit for the half-life of the double electron capture in 74Se (both for the neutrinoless and two neutrino processes) was estimated to be >1.5Ã1019 yr.
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Authors
M. JeÅ¡kovský, D. Frekers, A. KováÄik, P.P. Povinec, P. Puppe, J. StanÃÄek, I. Sýkora, F. Å imkovic, J.H. Thies,