Improved molecular constants for the and states of NaH |
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Authors: | FP Pesl S Lutz K Bergmann |
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Institution: | Fachbereich Physik, Universit?t Kaiserslautern, 67663 Kaiserslautern, Germany, DE
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Abstract: | Improved molecular constants for the and states of the NaH molecule are presented. NaH molecules are produced by reactive scattering of H and Na2 in a crossed beam experiment. High vibrational levels (6 9) of the NaH molecules are predominantly populated. Their excitation spectrum in the range has been measured using a new variant of Doppler spectroscopy. The transition frequencies involving the vibrational levels
2 8 in the and 6 9 in the state have been determined with an accuracy of better than . Using also previously published data a new set of molecular constants for the and state is derived. In particular, the vibrational dependence of the rotational constants B, D and H as well as some of v”-v' band origins for and is determined. The transition frequencies measured here or published previously are reproduced by these new coefficients
with an accuracy of 0.1 cm-1 rms value] with a maximum deviation of 0.4 cm-1. New RKR potential energy curves have been calculated up to the turning points of the levels v” = 9 in the state and v' = 25 in the state.
Received 21 August 1999 |
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Keywords: | PACS 33 15 Mt Rotation vibration and vibration-rotation constants - 33 20 Kf Visible spectra |
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