Hyperfine structure and isotope shift of the 1.3-microm transition of (129)I.
High resolution Fourier transform spectra of the 1.3-microm emission from (127)I and (129)I electrodeless discharge lamps are presented and analyzed. The hyperfine splitting constants of (129)I 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 (129)I and (127)I for the 1.3-microm transition was measured to be <1 mK.
Engleman
R
R
Keller
R A
RA
Palmer
B A
BA