@article{1212,
  keywords = {pfc},
  author = {L. Chen and W.-Y. Cheng and Jun Ye},
  title = {Hyperfine interactions and perturbation effects in the B0u+(3Πu) state of 127I2},
  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},
  year = {2004},
  journal = {Journal of the Optical Society of America B},
  volume = {21},
  chapter = {820-832},
  month = {2004-04},
  doi = {10.1364/JOSAB.21.000820},
  note = {JILA Pub. 7169},
}