l mixing and dissociation of Rydberg molecules accompanying slow collisions with inert-gas atoms |
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Authors: | G V Golubkov G K Ivanov E M Balashov M G Golubkov |
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Institution: | (1) N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 117977 Moscow, Russia |
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Abstract: | Processes involving a change of orbital angular momentum l and the dissociation of Rydberg molecules when they collide with inert-gas atoms are considered, using a method based on
analyzing the terms of the interacting systems. The proposed method makes it possible to take into account the perturbations
in a large group of Rydberg states that weakly penetrate into the ion core and to go beyond the limits of the two-level approximations
R. F. Stebbings and F. B. Dunning, eds., Rydberg States of Atoms and Molecules (Cambridge University Press, Cambridge, 1983; Mir, Moscow, 1985)] widely used in the theory of l mixing with the participation of Rydberg atoms. Using the Na**(nd)+Xe reaction as an example, it is demonstrated that this method gives good results in a wide range of variation of the principal
quantum number n of the Rydberg electron (n≈10–40). Features of the l mixing and dissociation of Rydberg molecules are studied for the H2**+Xe system. It is shown that collisional dissociation occurs by the formation of an intermediate Rydberg state of the molecules,
followed by self-decay into a dissociative continuum.
Zh. éksp. Teor. Fiz. 114, 100–113 (July 1998) |
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