Collision-radiation-collision three-step processes, and a measurement of the probability ratio for neutralization of 4 keV protons into either H(2p) or H(1s)

Abstract
Branching ratios for production of either H(2p) or H(1s) by neutralization of 4 keV protons on He, Ne, Ar and H2 have been measured by double charge transfer (H+ to H-) translational spectroscopy.