Nonperturbative treatment of electron-impact ionization of Ar(3p)

作者：Zatsarinny Oleg^*; Bartschat Klaus

来源：Physical Review A, 2012, 85(3): 032708.

DOI：10.1103/PhysRevA.85.032708

We present triple-differential cross sections for electron-impact ionization of a 3p electron in Ar. Results from a fully nonperturbative close-coupling formalism using our B-spline R-matrix approach are compared with those from a hybrid distorted-wave plus R-matrix (close-coupling) expansion as well as recent experimental data of Ren et al. [Phys. Rev. A 83, 052714 (2011)]. We find overall good agreement between the two sets of entirely independent theoretical predictions but serious discrepancies with the published experimental data regarding the drop of the cross section with increasing detection angle of "scattered projectile," i.e., the faster of the two outgoing electrons. A detailed investigation of the dependence of the results on this angle suggests that obtaining reliable data, both experimentally and theoretically, is highly challenging in the regime where the largest discrepancies occur.

• 出版日期2012-3-15