Fig. 1
From: A comparative study of target fabrication strategies for microgram muonic atom spectroscopy

Schematic representation of the transfer process explained above. (a) Muon enters the gas cell, (b) muon is stopped and forms \(\mu \textrm{p}\), (c) \(\mu \textrm{p}\) diffuses until it gets close to D2, (d) muon is transferred to deuterium, (e) \(\mu \textrm{d}\) diffuses to the back of the gas cell, (f) muonic atom of interest is formed and corresponding x rays are emitted6.