Issue |
EPJ Web of Conferences
Volume 2, 2010
CNR*09 - Second International Workshop on Compound Nuclear Reactions and Related Topics
|
|
---|---|---|
Article Number | 05002 | |
Number of page(s) | 4 | |
Section | Neutron Induced Reactions | |
DOI | https://doi.org/10.1051/epjconf/20100205002 | |
Published online | 09 March 2010 |
https://doi.org/10.1051/epjconf/20100205002
Neutron Activation of 74Ge and 76Ge
1
Kepler Center for Astro and Particle Physics, Eberhard Karls Universität
Tübingen, D-72076
Tübingen, Germany
2
Institut für Radiochemie, Technische Universität München,
D-85748
Garching, Germany
3
Institut für Kernphysik, Universität zu Köln, D-50937
Cologne, Germany
4
Forschungs-Neutronenquelle Heinz Maier-Leibnitz FRM II, Technische
Universität München
D-85748
Garching, Germany
a e-mail:
meierhofer@pit.physik.uni-tuebingen.de
The upcoming GERDA and MAJORANA experiments will use germanium crystals, isotopically enriched in 76Ge to search for the neutrinoless double beta decay (0ν2β). The very long half-life of 0ν2β (> 1025 y for 76Ge) requires an extremely low background level. Neutrons induced by cosmic muons can be captured after thermalization by 74Ge or 76Ge, followed by β− -decay of 75Ge and 77Ge respectively. The prompt γ-cascade after neutron capture and the β-decay contribute to the total backround in these experiments. For a good estimation of the background the poorly known cross-sections for the 74Ge(n,γ)75,75mGe reactions were measured using targets, isotopically depleted in 76Ge. Furthermore the prompt γ-rays in 77Ge were measured with isotopically enriched germanium targets. The results of the latter measurement were combined with the results of a dedicated coincidence measurement to reconstruct the prompt γ-ray decay scheme.
© Owned by the authors, published by EDP Sciences, 2010
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