Abstract
The infrared spectrum of gas-phase RbH in its ground electronic state has been observed using a diode laser spectrometer. The wavenumbers of a number of transitions have been measured in each of the ν=1←0, ν=2,←1, ν=3←2 and ν=4←3 bands of both 85RbH and 87RbH with a nominal accuray of ± 0.001 cm −1. These data have been used to obtain the most accurate values for the ground-state Dunham parameters available to date. An improved value of r e = 2.3668079 (82) Å has been determined.
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