Photon, scattered-atom coincidence measurements, with polarization analysis, in 3.0-keVHe+- He collisions

Abstract

Photon, scattered-atom coincidence measurements with polarization analysis have been made for 3.0-keV ${\mathrm{He}}^{+}$-He charge-transfer collisions leading to $\mathrm{He}\left(3\mathrm{}{}_{}{}^3{}_{}{}^{}P\right)$ excitation. The phase difference between the scattering amplitudes for $m_l=0\mathrm{}$ and $m_l=\pm 1$ magnetic-sublevel formation is an approximately constant function of scattering angle. We interpret our results using the electron promotion model and show that the phase difference should be a constant function of scattering angle and incident kinetic energy.