Molecular beam magnetic resonance study of intra- and inter- molecular effects in H 2 in high rotational states

Author： Verberne J. Ozier I. Zandee L. Reuss J.

ISSN： 1362-3028

Source： Molecular Physics, Vol.35, Iss.6, 1978-06, pp. : 1649-1657

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Abstract

The hyperfine spectrum of H 2 in the ( J = 3) and ( J = 5) rotational states has been observed in the low-field limit by the molecular beam magnetic resonance method. The spin-rotation constant c J and the spin-spin constant d J have been determined for each state. The results in kHz are It is shown that these values are consistent with the earlier measurements of Ramsey and collaborators on H 2 , HD and D 2 in lower rotational states and the current theory for centrifugal distortion and isotope effects. From the intensities of the two ( J = 3) lines, the two ( J = 5) lines and one ( J = 1) line, it is shown that the distribution over rotational states in a nozzle source under the conditions used here is strongly athermal.