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- Jansons, M, et al.
(författare)
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Quasi-resonant Energy-transfer In Collisions - Na2(a(1)sigma(u)(+))+k(4s)
- 1994
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Ingår i: Zeitschrift für Physik D Atoms, Molecules and Clusters. - 0178-7683. ; 31:1-2, s. 55-59
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Tidskriftsartikel (refereegranskat)abstract
- Cross sections for electron energy transfer from the initial rotational state J' of the two lowest vibrational levels upsilon' = 0 and upsilon' = 1 of excited dimers Na2(A) to potassium atoms as described by Na2(A1Sigma(u)+, upsilon'J') + K(4S) --> Na2 (X1Sigma(g)+, upsilon''J'')+K(4P)+DeltaE have been examined by laser-induced fluorescence. A strong increase of the cross section by as much as an order of magnitude has been observed for those dimer upsilon'J'-levels for which the dipole transitions are close to resonance of the 4S-4P transitions in the atom (DeltaE < 4 cm-1). The absolute cross sections for energy transfer have been calculated by the Rabitz approximation of first-order perturbation theory. In the case of closest energy resonance (DeltaE = 0.9 cm-1) the cross section is Q = 7.8 x 10(-13) cm2.
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| 3. |
- Klavins, J, et al.
(författare)
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Ionization In Collisions Between Excited Sodium Dimers and Atoms
- 1994
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Ingår i: Chemical Physics Letters. - : Elsevier BV. - 0009-2614. ; 228:4-5, s. 346-350
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Tidskriftsartikel (refereegranskat)abstract
- Associative ionizing molecule-atom collisions Na-2(A(1) Sigma(u)(+)) + Na(3p) --> Na-3(+) + e have been observed at simultaneous excitation of dimers and atoms by means of two lasers. Measurements of the relevant ionization current show that the cross section of molecule-atom ionizing collisions exceeds by an order of magnitude the cross section of the well-known atom-atom associative ionization Na(3p) + Na(3p) --> Na-2(+) + e.
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