Postprint version. Published in Astroparticle Physics, Volume 34, August 1, 2010, pages 18-24.
The definitive version is available at http://dx.doi.org/10.1016/j.astropartphys.2010.04.004.
To better understand the contribution of cosmic ray muons to the CUORICINO background, 10 plastic scintillator detectors were installed at the CUORICINO site and operated during the final 3 months of the experiment. From these measurements, an upper limit of 0.0021 counts/(keV kg yr) (95% CL) was obtained on the cosmic ray-induced background in the neutrinoless double beta decay region of interest. The measurements were also compared to GEANT4 simulations.