Observation of the isotope effect in the ν2 fundamental of germane

1 January 1980

journal article
Published by AIP Publishing in The Journal of Chemical Physics

Vol. 72 (1) , 395-398
https://doi.org/10.1063/1.438862

Abstract

Ten ro–vibrational transitions in the ν₂ fundamental of germane, GeH₄, have been investigated with a tunable sideband laser. The isotope effect, i.e., the fivefold occurence of each transition due to the natural germanium isotopes, has been clearly resolved. From the observation of a combination difference the ground state centrifugal distortion constant D_t is determined to 67.6±0.4 kHz for two molecular isotopes separately. The dependence of other molecular constants on the isotope mass is shown. The worst‐case error in absolute frequency measurement is about 18 MHz while the relative accuracy is believed to be better than 5 MHz for most of the lines observed.

Keywords

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