Abstract
Nuclear quadrupole hyperfine structure has been observed in the 1–0 vibration–rotation band of hydrogen iodide with a tunable-diode laser. The measured splittings agree well with microwave measurements of the HI molecule. Evidence for a slight change in the iodine nuclear quadrupole coupling constant from the ground to first excited vibrational state in hydrogen iodide was found.
© 1980 Optical Society of America
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