Diffusion and trapping of muonium on silica surfaces |
| |
Authors: | D.R. Harshman R. Keitel M. Senba R.F. Kiefl E.J. Ansaldo J.H. Brewer |
| |
Affiliation: | TRIUMF and Department of Physics, University of British Columbia, Vancouver, B.C., Canada V6T 2A3 |
| |
Abstract: | The spin relaxation rate λMu of muonium atoms on fine silica powder surfaces was measured as a function of temperature and of the surface concentration of hydroxyl groups. Results indicate two-dimensional diffusion, trapping and detrapping of the muonium atoms on the silica surface. At low temperatures λMu decreases dramatically as the concentration of surface hydroxyls is reduced. A three-state model is used to extract the muonium adsorption energy and other physical parameters. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |