Neutron Inelastic Scattering Processes as Background for Double-Beta Decay Experiments

Details Neutron Inelastic Scattering Processes as Background for Double-Beta Decay Experiments Neutron Inelastic Scattering Processes as Background for Double-Beta Decay Experiments

2007-04-03

arxiv.org/abs/0704.0306v4

Phys.Rev.C77:054614,2008

Physics

Nuclear Physics

Nuclear Experiment

16 pages, 7 figures

Scientific paper

10.1103/PhysRevC.77.054614

We investigate several Pb$(n,n'\gamma$) and Ge$(n,n'\gamma$) reactions. We measure $\gamma$-ray production from Pb$(n,n'\gamma$) reactions that can be a significant background for double-beta decay experiments which use lead as a massive inner shield. Particularly worrisome for Ge-based double-beta decay experiments are the 2041-keV and 3062-keV $\gamma$ rays produced via Pb$(n,n'\gamma$). The former is very close to the ^{76}Ge double-beta decay endpoint energy and the latter has a double escape peak energy near the endpoint. Excitation $\gamma$-ray lines from Ge$(n,n'\gamma$) reactions are also observed. We consider the contribution of such backgrounds and their impact on the sensitivity of next-generation searches for neutrinoless double-beta decay using enriched germanium detectors.

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