Electron Capture into then=3States of H by FastH+Impact onN2

Electron capture into the $3s$, $3p$, and $3d$ states of hydrogen has been measured for 10-35 keV proton impact on ${\mathrm{N}}_2$. Polarization of the $3d\to 2p$ and $3p\to 2s$ radiations resulting from the collisions has also been measured. The cross sections for the production of Balmeralpha radiation have been calculated from the $3s$, $3p$, and $3d$ cross sections and compared with those of previous investigations. The $3d$ cross section is about equal to the $3s$ cross section at 10 keV, but decreases monotonically as the energy is increased to 35 keV.