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Experiments designed to study rare processes, such as neutrinoless doublebeta decay ($0\nu\beta\beta$), are crucial tests for physics beyond thestandard model. These experiments rely on reducing the intrinsic radioactivebackground to unprecedented levels, while adequately shielding the detectorsfrom external sources of radioactivity. An understanding of the potential forneutron excitation of the shielding and detector materials is important forobtaining this level of sensitivity. Using the broad-spectrum neutron beam atLANSCE, we have measured inelastic neutron scattering on $^{nat}$Cu. The goalof this work is focused on understanding the background rates from neutronsinteracting in these materials in regions around the Q-values of many candidate$0\nu\beta\beta$ decay isotopes, as well as providing data for benchmarkingMonte Carlo simulations of background events. Results: We extracted the levelcross sections from the $\gamma$ production cross section for 46 energy levelsin $^{nat}$Cu . These level cross sections were compared with the availableexperimental data, as well as the ENDF/B-VII evaluation for discrete levels. Wealso examined the potential implications of our measurements on$0\nu\beta\beta$ measurements and found that many of the commonly studied$0\nu\beta\beta$ isotopes had Q-values below the cutoff for ENDF/B-VIIevaluated discrete levels in either Cu nucleus.

Neutron inelastic scattering in natural Cu as a background in neutrinoless double-beta decay experiments