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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 21, Iss. 4 — Apr. 1, 2004
  • pp: 820–832

Hyperfine interactions and perturbation effects in the B0u+(3Πu) state of 127I2

Lisheng Chen, Wang-Yau Cheng, and Jun Ye  »View Author Affiliations


JOSA B, Vol. 21, Issue 4, pp. 820-832 (2004)
http://dx.doi.org/10.1364/JOSAB.21.000820


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Abstract

We report new measurements of the hyperfine spectra of B←X transitions in the wavelength range 500–517 nm. Four effective hyperfine parameters, eqQB, CB, dB, and δB, are determined for an extensive number of rovibrational levels spanning the intermediate region 42≤v≤70 in the electronically excited B0u+(3Πu) state. Second-order perturbation accounts for most of the observed rovibrational dependence of the hyperfine interactions. In addition, it was found that, near vibrational levels v=57–60, the 1g(1Πg) electronic state strongly perturbs the B state through rotational coincidence, leading to effects such as abnormal variations in the hyperfine parameters and strong u–g mixing recorded for the transition P(84)60–0. Various perturbation effects in the B state identified so far are summarized. Also, the radial dependence of the hyperfine interactions was examined by removal of the vibrational average in the hyperfine parameters.

© 2004 Optical Society of America

OCIS Codes
(020.2930) Atomic and molecular physics : Hyperfine structure
(300.6190) Spectroscopy : Spectrometers
(300.6390) Spectroscopy : Spectroscopy, molecular
(300.6460) Spectroscopy : Spectroscopy, saturation

Citation
Lisheng Chen, Wang-Yau Cheng, and Jun Ye, "Hyperfine interactions and perturbation effects in the B0u+(3Πu) state of 127I2," J. Opt. Soc. Am. B 21, 820-832 (2004)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-21-4-820

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