Berlin 2001 – scientific programme

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A: Atomphysik

A 1: Posters Monday (Cluster, Atoms in Fields)

A 1.37: Poster

Monday, April 2, 2001, 12:30–15:00, AT3

STOCHASTIC INSTABILITY OF MULTIOSCILLATOR SYSTEMS, HIGHLY EXCITED ATOMS IN ELECTROMAGNETIC FIELD AND CHAOTIC DYNAMICS OF DIATOMIC MOLECULES IN RESONANCE HIGH-INTENSITY IR FIELD — •Alexander Glushkov¹, Sergey Ambrosov¹, Vladimir Ignatenko², and Georgy Prepelitsa² — ¹Atom.-Nucl.-Mol. Spectr. Centre and Inst. Appl. Math. OHMI, P. O. Box 108, Odessa-9, 65009, Ukraine — ²Comput. Dept., OHMI, P. O. Box 108, Odessa-9, 65009, Ukraine

Stochastic instability of oscillator and ionization of the highly excited atoms in an electromagnetic field is studied. On the basis of the optimal governing theory it is constructed the optimized models of electromagnetic effect on highly excited atoms with numeral realization. These models are also used for study of the resonance spectroscopic effects in the forming of the non-linear atmosphere gases behaviour (under propagation of the powerful IR pulses under different conditions and atmosphere models). We have examined an effect of 2-photon IR adsorption on vibration-rotational molecular transitions: CO2 IR in water steam 010 band and received for 2-photon adsorption probability   (2−3)10⁹, that is in agreement with estimate of Letokhov etal: (1−1,5)10⁹s⁻¹. It is on several orders less than value of the one-photon process probability.

Chaotic dynamics of the diatomic molecules in a high-intensive IR field which is of a great interest in last year, is studied. Situations with the circularly and plane polarized radiation are considered and an appearance of the quantum chaos in molecule in last case is shown.