Vol. 10, No 1, 2012 pp. 13 - 20
DOI 10.2298/FUPCT1201013V
UDC 546.11 : 54-188 + 621.375.826

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HYDROGEN ATOM IN 2S STATE IN A LASER FIELD
Svetlana Vučić
Institute of Physics, University of Belgrade, PO Box 57, 1001 Belgrade, Serbia
E-mail: vucic@ipb.ac.rs

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Abstract.The hydrogen atom in the 2s state exposed to a linearly polarized laser field is studied by using the non-perturbative non-Hermitian Floquet theory. The electronic density of the quasi-energy H(2s) state versus the electron coordinate is analyzed. We conclude that the decay of an atom in a low-intensity non-resonant laser field occurs from the asymptotically distant part of the initial state. On the other hand, the process of electron emission in a resonant laser field is governed by the excited-bound-state-part of the resonance wave function. With an increase in the intensity and by increasing the degree of excitation of the initial state not too high, the electron is ionized at smaller distances from the nucleus.
Key words: hydrogen, 2s state, laser field, resonance

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ATOM VODONIKA U 2S STANJU U LASERSKOM POLJU Atom vodonika u pobuđenom stanju 2s nalazi se u laserskom polju. Izučavan je primenom ne-perturbativne ne-Hermitske teorije Floke. Zaključeno je da sa povećanjem intenzita polja i sa povećanjem stepena pobuđenja početnog stanja, elektron biva jonizovan pri sve manjim rastojanjima od jezgra.
Ključne reči: vodonik, 2S stanje, lasersko polje, rezonanca