Measurement of muonium emission from silica aerogel
Bakule, P. · Beer, G. A. · Contreras, D. · Esashi, M. · Fujiwara, Y. · Fukao, Y. · Hirota, S. · Iinuma, H. · Ishida, K. · Iwasaki, M. · Kakurai, T. · Kanda, S. · Kawai, H. · Kawamura, N. · Marshall, G. M. · Masuda, H. · Matsuda, Y. · Mibe, T. · Miyake, Y. · Okada, S. · Olchanski, K. · Olin, A. · Onishi, H. · Saito, N. · Shimomura, K. · Strasser, P. · Tabata, M. · Tomono, D. · Ueno, K. · Yokoyama, K. · Yoshida, S.
الأصل · EN
Emission of muonium (μ⁺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 yields.
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