Abstract

High resolution Fourier transform spectra of the 1.3-μm emission from 127I and 129I electrodeless discharge lamps are presented and analyzed. The hyperfine splitting constants of 129I are: A = 18.35 ± 0.01 mK and B = 26.55 ± 0.07 mK for the J = 3/2 ground state and A = 146.32 ± 0.02 mK for the J = 1/2 excited state. The validity of the theoretical intensity and isotope relationships is confirmed. The isotope shift between 129I and 127I for the 1.3-μm transition was measured to be <1 mK.

© 1980 Optical Society of America

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