Double differential cross sections for soft electron emission in ionization of hydrogen by bare carbon ions

Young Type Interference Effect on the Forward-Backward Asymmetry Parameter in Electron Emission from H2Under Fast Ion Impact

“…the soft collision, two center effect, binary encounter and electron capture in continuum [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Since the two indistinguishable H-atoms may be termed as a coherent source of electrons in a large impact parameter collision with a fast projectile, their contributions to the ionization add coherently and an interference effect may be expected and has been observed [1,2].…”

“…We have now demonstrated [41] an independent way of obtaining the interference structure by using the forward backward asymmetry parameter of electron DDCS which is independent of the theoretical model calculations and does not require a complementary experiment with atomic H. The experiments with atomic H as a target become difficult owing to the involved procedure of production of atomic H from the dissociation of H 2 . It is known that a large forward backward angular asymmetry is mainly caused by the two-center mechanism in heavy ion collisions [5][6][7][8][9][10][11][12][13][14]. The enhancement in the forward directions and depletion in the backward angles is caused by the long range post collisional interaction among the three particles in the continuum (electron-projectile ion-recoil ion) of the final states and qualitatively explained by the continuum distorted wave models such as CDW-EIS (eikonal initial state), at least for an atomic target like He [5][6][7] or H [8][9][10].…”