Multilevel rotational transitions in the intermediate stage of three-photon ionization of molecules |
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Authors: | G K Ivanov G V Golubkov S V Drygin I E Cherlina |
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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: | Ionization and dissociation of diatomic molecules induced by a weak field (after preliminarily populating an intermediate
level) and by intense, linearly polarized monochromatic radiation have been studied. Field-induced mixing of rotational components
of various electronic-vibrational states of molecules (such as CO, NO, etc.) at field strength f∼10−4–10−5 atomic units can lead to migration among states with different angular momenta J. Therefore, ions with rotational momenta J
+ much higher than those prescribed by selection rules for three-photon absorption can be formed from molecules in the ground
state. The possibility of selective formation of ions with J
+≫1 and zero projection of the angular momentum on the polarization vector of the external electromagnetic radiation has been
investigated.
Zh. éksp. Teor. Fiz. 111, 1624–1632 (May 1997) |
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Keywords: | |
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