Abstract
The experimental signature in searches for the neutrinoless double-β decay of 76Ge is a peak near 2039 keV in the spectrum. Given the low probability of the process, it is important that the background in this region be well understood. Inelastic scattering reactions with neutrons from muon-induced interactions and (α,n) reactions in the surrounding materials or in the detector can provide contributions to the background. We have measured the production cross sections for γ rays from the 76Ge(n,n'γ ) reaction in the 2039-keV region at incident neutron energies up to 4.9 MeV. In addition to determining that the cross sections of a previously known 2040.7-keV γ ray from the 3952-keV level in 76Ge are rather small, we find that a larger contribution arises from a 2037.5-keV γ ray which is attributed to a newly identified level at 3147 keV in 76Ge. A third contribution is also possible from another new level at 3577 keV. These results indicate that the 2039-keV region in 76Ge neutrinoless double-β decay searches is more complex than was previously thought.
Document Type
Article
Publication Date
9-2015
Digital Object Identifier (DOI)
https://doi.org/10.1103/PhysRevC.92.034310
Funding Information
This material is based upon work supported by the U.S. National Science Foundation under Grant No. PHY-1305801.
Repository Citation
Crider, Benjamin P.; Peters, Erin Elizabeth; Allmond, J. M.; McEllistrem, Marcus T.; Prados-Estévez, Francisco M.; Ross, T. J.; Vanhoy, J. R.; and Yates, Steven W., "Inelastic Neutron Scattering Cross Sections for 76Ge Relevant to Background in Neutrinoless Double-β Decay Experiments" (2015). Physics and Astronomy Faculty Publications. 389.
https://uknowledge.uky.edu/physastron_facpub/389
Notes/Citation Information
Published in Physical Review C, v. 92, no. 3, article 034310, p. 1-7.
©2015 American Physical Society
The copyright holders have granted the permission for posting the article here.