Doubly differential electron emission for transfer ionization in 100-keVH+on Ar

We have measured doubly differential electron emission for transfer ionization produced by 100-keV ${\mathrm{H}}^{+}$ impact on an Ar target. Data were obtained by measuring coincidences between electrons of selected energy and angle of emission with outgoing ${\mathrm{H}}^0$ projectiles. The measurements covered emission angles in the range of θ=0° to 160° and energies starting from 10 eV. We present a detailed discussion on the experimental conditions used and give a tentative interpretation of the main features observed.