Measurement of X-rays from anti-protonic hydrogen and deuterium

The yields of K and L series X-rays from pp atoms and of the L series X-rays from pd atoms have been measured at gas densities of 0.25, 0.92, 2.0 and 10.0ρ STP . For pp atoms the strong interaction shift and width for the 1s state and the width of the 2p state have been measured. The results are in good agreement with the predictions of potential models.