Determination of Muonic Helium X-Ray Yields after Muon-Catalyzedpd,dd, anddtFusion

Abstract
X-ray yields of the muonic helium (2-1) transition from μ-catalyzed fusion have been measured for the first time in various mixtures of hydrogen isotopes. They were determined to be 0.032(4), 0.016(2), and 0.0019(5) for pd, dd, and dt fusion, respectively.