Multichannel excitation cross sections of sodium atoms at slow collisions with hydrogen atoms |
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Authors: | D. V. Vlasov P. S. Barklem A. K. Belyaev |
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Affiliation: | 1.Herzen Russian State Pedagogical University,St. Petersburg,Russia;2.Department of Physics and Astronomy,Uppsala University,Uppsala,Sweden |
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Abstract: | Excitation cross sections at slow collisions of hydrogen and sodium atoms are calculated based on two sets of quantum-chemical data. The results of calculations permit one to conclude that, upon the excitation of the sodium atom from the ground state in the region of near-threshold energies, the cross sections are highly sensitive to matrix nonadiabaticity elements. In addition, the matrix nonadiabaticity element was varied for the transition 3s → 3p of the sodium atom at fixed collision energy near the reaction threshold. It was found that the variation leads to a significant change in the excitation cross section 3s → 3p, and the range of the energetic dependence of this cross section was determined. |
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