Polarized-photon–scattered-particle correlation measurements inH++He collisions

Measurements of the relative magnetic-substate population of differentially scattered H(2p) atoms formed in 4-, 5-, and 8-keV proton-helium collisions have been made using polarized-photon–scattered-particle coincidence techniques. The relative phases of the scattering amplitudes were also determined. It was found that the differential cross sections for the magnetic substates $m_l$=0 and $m_l$=±1 were of comparable magnitude indicating that translational and rotational coupling play equally important roles in the excitation process. The average measured phase difference was found to be ‖45?(de‖.