EGAS41 - Swansea University

41 st EGAS CP 96 Gdańsk 2009
Ionization of Mg atom by electron impact in the region of
autoinizing states excitation
T. Zajac 1 , A. Opachko 2 , V. Simulik 3,∗ , R. Tymchyk 4
1 Department of Electronic Systems, 13 Kapitulna Str., Uzhgorod, Uzhgorod National
University, Ukraine
2 Transkarpathian Regional Center of Scientific and Technical Creative Work of the Pupil’s
Youth, 1 Buditeliv Str., Ukraine
3 Institute of Electron Physics, 21 Universitetska str, Uzhgorod, National Academy of Sciences,
Ukraine
4 Institute of Electron Physics, 21 Universitetska str, Uzhgorod, National Academy of Sciences,
Ukraine
∗ Corresponding author: sim@iep.uzhgorod.ua
The method of interacting configurations in complex numbers representation (MICCNR)
was created in [1-3]. Moreover, the calculations of the positions and total widths of AIS,
converging to the N=3 threshold of helium atom, were done [1-3].
MICCNR has a high precision in the problem of determination of positions and widths
of autoionizing states (AIS) in the processes of ionization of the atoms by photons, electrons
and other particles. The method under consideration is the further development
and generalization of the standard method of interacting configurations in the real number
representation.
The advantages of this method are as follows. First it is the absence of difficulties with
the identification of resonances (of AIS), further we may mark the possibility of finding
here the widths of quasi-stationary states, which is a problematical task in other methods.
The program of application of MICCNR to the calculation of ionization processes for
more complex (in comparison with helium atom) atomic structures is the actual next
step. Below we apply this method to the problem of photoionization of Mg atom. The
positions of lowest five 1 S, 1 P, 1 D, 1 F AIS of Mg in the problem of ionization of atom
by electron impact will be presented in the special table. The indirect comparison with
the similar states, which are generated in the problem of electron scattering on the Mg
ion [4] will be fulfilled. In the paper [4] the calculations were made in the diagonalising
approximation.
References
[1] S.M. Burkov, S.I. Strakhova, T.M. Zajac, J. Phys. B: Atom. and Mol. Phys 21,
p.3677-3689 (1990)
[2] T.M. Zajac, Uzhgorod University Scientific Herald: Ser. Physics 11, p. 72-86 (2002)
[3] T.M. Zajac, V.M. Simulik, Int. J. Pure Appl. Phys. 2, p.231-248 (2006)
[4] V.I. Lengyel, V.T. Navrotsky, E.P. Sabad, J. Phys. B: At. Mol. Opt. Phys. 23,
p.2847-2867 (1990)
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