POTENTIAL ENERGY CURVES FOR THE B, C, B' AND D STATES OF THE HYDROGEN MOLECULE.

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1965

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Ohio State University

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The potential energy curves for the B, C, $B^{1}$ and D states of the $H_{2}$ molecule have been calculated from experimental spectroscopic data with the use of the Rydberg-Klein-Rees (R-K-R) method. The theoretical curve for the C state given by Kolos and Wolniewiez shows excellent agreement with the R-K-R curve over the whole range of internuclear distances. From these two curves and experimental evidence it is now evident that the C state does have a potential hump above its dissociation limit at the internuclear distance of about 4.76 {\AA}. Although some difficulties have been encountered in constructing the potential energy curve for the $B^{1}$ state in the vicinity of the dissociation limit, there is a definite indication that the right limb of the R-K-R curve could provide a limiting curve of the form required to explain the observed limiting curve for the dissociation continuum. Through these studies it was found that the last vibrational levels of the states B and $B^{1}$ are most probably $v = 36$ and $v = 8$, respectively. It was also found that the predissociation occurring in the C state should be classified as the case $b^{-}$ rather than $b^{0}$.

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Author Institution: Air Force Cambridge Research Laboratories, L. G. Hanscom Field

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