Interference effects due to projective-target nucleus scattering in single ionization of molecular hydrogen by 75 keV proton impact
"Doubly-differential cross-sections for the single ionization of molecular hydrogen by 75 keV proton impact have been measured as a function of the projectile scattering angle and energy loss and compared to available theoretical models. Interference structures are directly observed in the scattering angular dependence of the DDCS. The phase angle appears to be most sensitive to the projectile angle but not as sensitive to the electron energy, suggesting that the projectile - target nucleus interaction plays a central role in the interference. The large-angle structures disappear at electron speeds near the projectile speed. This may be due to a focusing effect introduced by post-collision interaction. Furthermore, our data suggest that for a given scattering angle, the ionization amplitude depends strongly on the molecular orientation, relative to the projectile beam axis, with transverse orientation favored at small angles and longitudinal orientation at large angles"--Abstract, page iii.
Missouri University of Science and Technology
Networked Digital Library of Theses and Dissertations