Fast electron impact ionization of molecular hydrogen and Young type interference

S. CHATTERJEE; S. KASTHURIRANGAN; A. H. KELKAR; C. R. STIA; O. A. FOJÓN; R. D. RIVAROLA; L. C. TRIBEDI

Perth, Australia

Congreso; Asian International Conference on Atomic and Molecular Physics; 2008

We have measured the energy and angular distribution of double differential cross sections (DDCS) of secondary electrons emitted in collision of 8 keV (~24 a.u.) electrons with molecular hydrogen target [1, 2]. The emitted electrons are detected in the energy ranging from 1 to 400 eV and wide range of observation angles between 300 and 1500. The measured data are compared with the theoretical calculations. The Young type interference arising due to the spatial coherence has been investigated in electron emission spectrum from single ionization of inversion symmetric homonuclear diatomic molecule, H2. The first-order interference is derived from DDCS energy distribution. The resulting ratio-spectra (H2-to-2H) show oscillating behaviors. A Cohen-Fano model function has been fitted to these oscillations for wide range of angles. The evidence of the interference effect in the angular distribution of the double differential spectrum of secondary electron is found for the first time.References[1] S. Chatterjee et al., Phys. Rev. A (to be published).[2] S. Chatterjee et al., J. Phys. B (submitted).