Fig. 9
From: A comparative study of target fabrication strategies for microgram muonic atom spectroscopy
Comparison of spectra obtained by measuring different barium targets showing the \(2p_{1/2}\)–\(1s\) (\(3923\,\text {keV}\)) and \(2p_{3/2}\)–\(1s\) (\(3989\,\text {keV}\)) transitions. The molecular plated (MP) targets had a substantially higher signal than the drop-on-demand (DoD) targets.
