[PDF]    http://dx.doi.org/10.3952/lithjphys.46202

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 46, 147–152 (2006)


EXCITATION OF POLARIZED ATOMS BY FAST ELECTRONS
A. Kupliauskienė, M. Šeimys, and R. Valavičius
Institute of Theoretical Physics and Astronomy of Vilnius University, A. Goštauto 12, LT-01108 Vilnius, Lithuania
E-mail: akupl@itpa.lt

Received 8 December 2005

The general expression for excitation cross-section of polarized atoms by fast electrons is derived by using the methods of the theory of an atom adapted for polarization in the plane wave Born approximation. In describing the alignment of excited atoms, the special cases of the general expression are obtained for both the polarized and non-polarized atoms and for the magnetic dichroism of the total ionization cross-section of polarized atoms.
Keywords: excitation of atoms by electron impact, polarization, angular distribution
PACS: 34.80.Dp, 29.25.Pj, 29.25.Lg


POLIARIZUOTŲ ATOMŲ SUŽADINIMAS GREITAISIAIS ELEKTRONAIS
A. Kupliauskienė, M. Šeimys, R. Valavičius
VU Teorinės fizikos ir astronomijos institutas, Vilnius, Lietuva

Taikant atomo teorijos matematinį aparatą, Borno artinyje gautos poliarizuotų atomų sužadinimo greitais nepoliarizuotais elektronais diferencialinio skerspjūvio bendrosios išraiškos. Jos patogios aiškinant atskirus poliarizacijos atvejus, sutinkamus konkrečiuose eksperimentuose, bei gaunant juos aprašančių diferencialinių skerspjūvių išraiškas. Gautos poliarizuotų atomų sužadinimo nepoliarizuotais elektronais pilnutinio skerspjūvio magnetinio dichroizmo išraiška bei nepoliarizuotais elektronais sužadinto atomo rikiavimo išraiška kaip atskiri bendrosios išraiškos atvejai.


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