{"paper":{"title":"Measurement of radioactive contamination in the high-resistivity silicon CCDs of the DAMIC experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","physics.ins-det"],"primary_cat":"astro-ph.IM","authors_text":"A. Aguilar-Arevalo, A. Casta\\~neda V\\'azquez, A.E. Chavarria, A. Kavner, B. Kilminster, D. Amidei, D. Bole, D. Torres Machado, F. Izraelevitch, F. Trillaud, G. Cancelo, G. Fernandez Moroni, G. Moreno-Granados, I. Lawson, J.C. D'Olivo, J. Estrada, J. Liao, J. Molina, J. Pena, J.R.T. de Mello Neto, J. Tiffenberg, J. Zhou, K.P. Hern\\'andez Torres, M. Butner, M. L\\'opez, M. Sofo Haro, P. Privitera, S. Dixon, T. Schwarz, V. Scarpine, X. Bertou, X. You, Y. Sarkis","submitted_at":"2015-06-08T15:52:58Z","abstract_excerpt":"We present measurements of radioactive contamination in the high-resistivity silicon charge-coupled devices (CCDs) used by the DAMIC experiment to search for dark matter particles. Novel analysis methods, which exploit the unique spatial resolution of CCDs, were developed to identify $\\alpha$ and $\\beta$ particles. Uranium and thorium contamination in the CCD bulk was measured through $\\alpha$ spectroscopy, with an upper limit on the $^{238}$U ($^{232}$Th) decay rate of 5 (15) kg$^{-1}$ d$^{-1}$ at 95% CL. We also searched for pairs of spatially correlated electron tracks separated in time by "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.02562","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}