Measurement of muonium emission from silica aerogel

Abstract

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 yields.

11 pages, 5 figures, submitted to PTEP

References in corpus (3)

• (g-2)_mu and alpha(M_Z^2) re-evaluated using new precise data
• Hydrophobic silica aerogel production at KEK
• Muonium emission into vacuum from mesoporous thin films at cryogenic temperatures

Cited by in corpus (7)

• Spatial confinement of muonium atoms
• Precision Muonium Spectroscopy
• First muon acceleration and muon linear accelerator for measuring the muon anomalous magnetic moment and electric dipole moment
• Room-temperature emission of muonium from aerogel and zeolite targets
• Planar and Nematic Aerogels: DLCA and Superfluid 3He
• Progress in development of silica aerogel for particle- and nuclear-physics experiments at J-PARC
• Acceleration of positive muons by a radio-frequency cavity