{"paper":{"title":"Measurement of muonium emission from silica aerogel","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","physics.ins-det"],"primary_cat":"physics.atom-ph","authors_text":"A. Olin, D. Contreras, D. Tomono, G.A. Beer, G.M. Marshall, H. Iinuma, H. Kawai, H. Masuda, H. Onishi, K. Ishida, K. Olchanski, K. Shimomura, K. Ueno, K. Yokoyama, M. Esashi, M. Iwasaki, M. Tabata, N. Kawamura, N. Saito, P. Bakule, P. Strasser, S. Hirota, S. Kanda, S. Okada, S. Yoshida, T. Kakurai, T. Mibe, Y. Fujiwara, Y. Fukao, Y. Matsuda, Y. Miyake","submitted_at":"2013-06-17T11:03:34Z","abstract_excerpt":"Emission of muonium ($\\mu^{+}e^{-}$) atoms from silica aerogel into vacuum was observed. Characteristics of muonium emission were established from silica aerogel samples with densities in the range from 29 mg cm$^{-3}$ to 178 mg cm$^{-3}$. Spectra of muonium decay times correlated with distances from the aerogel surfaces, which are sensitive to the speed distributions, follow general features expected from a diffusion process, while small deviations from a simple room-temperature thermal diffusion model are identified. The parameters of the diffusion process are deduced from the observed yield"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.3810","kind":"arxiv","version":1},"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"}