Molecular orientation effect on the differential cross sections for the electron-impact double ionization of oriented water molecules

作者：Champion C^*; Oubaziz D; Aouchiche H; Popov Yu V; Dal Cappello C

来源：Physical Review A, 2010, 81(3): 032704.

DOI：10.1103/PhysRevA.81.032704

Double ionization of isolated water molecules fixed in space is here investigated in a theoretical approach based on the first Born approximation. Secondary electron angular distributions are reported for particular (e,3e) kinematical conditions and compared in terms of shape and magnitude. Strong dependence of the fivefold differential cross sections on the molecular target orientation is clearly observed in (e,3-1e) as well as (e,3e) channels. Furthermore, for the major part of the kinematics considered, we identified the different mechanisms involved in the double ionization of water molecule, namely, the direct shake-off process as well as the two-step1 process. They are both discussed and analyzed with respect to the molecular target orientation.

• 出版日期2010-3