Effect of initial-state target polarization on single ionization of helium by 1-keV electron impact

doi:10.1088/1674-1056/21/7/073402

Abstract We report new results of triple differential cross sections for the single ionization of helium by 1-KeV electron impact at the ejection energy of 10 eV. Investigations have been made for both the perpendicular plane and the plane perpendicular to the momentum transfer geometries. The present calculation is based on the three-Coulomb wave function. Here we have also incorporated the effect of target polarization in the initial state. A comparison is made between the present calculation with the results of other theoretical methods and a recent experiment [D黵r M, Dimopoulou C, Najjari B, Dorn A, Bartschat K, Bray I, Fursa D V, Chen Z, Madison D H and Ullrich J 2008 Phys. Rev. A 77 032717]. At an impact energy of 1 KeV, the target polarization is found to induce a substantial change of the cross section for the ionization process. We observe that the effect of target polarization plays a dominant role in deciding the shape of triple differential cross sections.

Keywords: triple differential cross section target polarization non-coplanar geometry

Received: 08 September 2011
Revised: 05 April 2012
Accepted manuscript online:

PACS:

34.80.Dp

(Atomic excitation and ionization)

Fund: Project supported by the Natural Science Foundation of Shanxi Province of China (Grant Nos. 20051008 and 2010011009), the National Natural Science Foundation of China (Grant No. 11047191), the Key Project of Chinese Ministry of Education (Grant No. 211025), and the Natural Science Foundation for Young Scientists of Shanxi Province, China (Grant No. 2009021005).

Corresponding Authors: Jia Xiang-Fu
E-mail: jiaxf@dns.sxnu.edu.cn

Cite this article:

Sun Shi-Yan (孙世艳), Ma Xiao-Yan (马晓艳), Li Xia (李霞), Miao Xiang-Yang (苗向阳), Jia Xiang-Fu (贾祥富 ) Effect of initial-state target polarization on single ionization of helium by 1-keV electron impact 2012 Chin. Phys. B 21 073402

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Effect of initial-state target polarization on single ionization of helium by 1-keV electron impact

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