Measurement of the K_β/K_α ratio for muon alpha sticking X-rays in muon catalyzed d-t fusion at the RIKEN-RAL Muon Facility

At the RIKEN-RAL Muon Facility, μ- to α sticking K β X-rays were observed for the first time taking advantage of the pulsed beam structure. The precision of the present measurements was insufficient to distinguish between theoretical models, however the observed K β /K α X-ray intensity ratio tends to be smaller than most of these theoretical predictions.