Hyperfine structure of low-lying vibrational levels in the B electronic state of molecular iodine
- National Research Laboratory of Metrology, 1-1-4, Umezono, Tsukuba-shi, Ibaraki 305, Japan (JP)
- Physikalisch-Technische Bundesanstalt, Bundesalle 100, D-3300 Braunschweig, Federal Republic of Germany
The hyperfine structures of the weak lines {ital R}(69) in the 3--4 band and {ital P}(84) in the 5--5 band of the {ital B}{l arrow}{ital X} electronic transition in molecular {sup 127}I{sub 2} at {lambda}=657 nm have been detected by the method of FM saturation spectroscopy. Frequency separations between the hyperfine components were measured, and the hyperfine coupling constants for the electric quadrupole interaction and the magnetic spin-rotation interaction were determined. For low vibrational levels of the {ital B} state, {ital eQq}{sub {ital B}} depends linearly on the vibrational energy of the level {ital v}{sub {ital B}} according to {ital eQq}{sub {ital B}} (MHz)={minus}0.01721{ital G}({ital v}{sub {ital B}}) (cm{sup {minus}1}){minus}484.89. {Delta}{ital C} is almost constant for {ital v}{sub {ital B}} values smaller than 6.
- OSTI ID:
- 5593954
- Journal Information:
- Journal of the Optical Society of America B: Optical Physics; (USA), Vol. 6:9; ISSN 0740-3224
- Country of Publication:
- United States
- Language:
- English
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