The analysis presented in the recent publication of the CRESST-II results [1] finds a statistically significant excess of registered events over known background contributions in the acceptance region and attributes the excess to a possible Dark Matter signal, caused by scattering of rather light WIMPs. We propose a mechanism which explains the excess events with ion sputtering caused by 206Pb recoils and α-particles from 210Po decay, combined with realistic surface roughness effects.

Additional Metadata
Keywords 210Po, CRESST, Dark Matter, Low background, Sputtering, Surface roughness, WIMP
Persistent URL
Journal Astroparticle Physics
Kuźniak, M. (M.), Boulay, M.G, & Pollmann, T. (T.). (2012). Surface roughness interpretation of 730 kg days CRESST-II results. Astroparticle Physics, 36(1), 77–82. doi:10.1016/j.astropartphys.2012.05.005