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- W2057053722 abstract "The dissociative recombination (DR) of vibrationally excited H${}_{2}^{+}$ ions to form products in high Rydberg states has been investigated experimentally and theoretically for small $(0.01ensuremath{-}0.1$ eV) center-of-mass energies of the projectile electron. The merged beam method was used in the experiment and very large cross sections were found for DR from highly vibrationally excited states. The Rydberg states population was analyzed by the application of an electric field ionizer with an axial electric field in excess of 70 kV/cm, which is sufficient to ionize Rydberg states with $n>~10$. Experiments with and without the ionizer were performed and cross sections $ensuremath{sigma}(0<n<~21)$, $ensuremath{sigma}(n<10)$, and $ensuremath{sigma}(10<~n<~21)$ were measured. The dipole approximation was used for the interpretation of the experimental results. Molecular rovibrational transitions were considered quantum mechanically. At low collision energy (0.01 eV), DR cross sections with high $n=10ensuremath{-}21$ Rydberg products arise from initial vibrational states $v>~15$. Absolute values of these cross sections are found to be of the order of magnitude of ${10}^{ensuremath{-}12}ensuremath{-}{10}^{ensuremath{-}13}$ cm${}^{2}$. Comparison of theoretical and experimental results has shown that the modified back autoionization (involving transitions to the continuum and to very high $n$; that is the ``indirect'' mechanism of DR) plays a significant role for all cross sections." @default.
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- W2057053722 date "1997-07-01" @default.
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- W2057053722 title "Dissociative recombination of vibrationally excited H<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msubsup><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math>ions: High-Rydberg-state formation" @default.
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- W2057053722 doi "https://doi.org/10.1103/physreva.56.443" @default.
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