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)
We report new measurements of the hyperfine spectra of transitions in the wavelength range 500–517 nm. Four effective hyperfine parameters,
and are determined for an extensive number of rovibrational levels spanning the intermediate region in the electronically excited 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 the electronic state strongly perturbs the B state through rotational coincidence, leading to effects such as abnormal variations in the hyperfine parameters and strong mixing recorded for the transition 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.
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A four-term effective Hamiltonian is used in the fit. Transitions
and
are not included in this table because their upper-level hyperfine spectra are altered considerably by the hyperfine perturbation from a
state.
and
are determined by Eqs. (14) and (10), respectively, of Ref. 13 and are held fixed in the fit.
and
are fixed in the fit to 1.524 and 3.705 kHz,13 respectively.
Quoted uncertainties (1σ) are estimated from the standard deviations of the fits.
and
The fit includes 69 levels with
which are taken from this study and from published data summarized in Refs. 13 and 25.
Quoted uncertainties (1σ) are estimated from the standard deviations of the fit.
Tables (2)
Table 1
B-State Effective Hyperfine Parameters Derived from the Measurement of Rovibrational Transitions in the Wavelength Range 500–517 nma
A four-term effective Hamiltonian is used in the fit. Transitions
and
are not included in this table because their upper-level hyperfine spectra are altered considerably by the hyperfine perturbation from a
state.
and
are determined by Eqs. (14) and (10), respectively, of Ref. 13 and are held fixed in the fit.
and
are fixed in the fit to 1.524 and 3.705 kHz,13 respectively.
Quoted uncertainties (1σ) are estimated from the standard deviations of the fits.
and
The fit includes 69 levels with
which are taken from this study and from published data summarized in Refs. 13 and 25.
Quoted uncertainties (1σ) are estimated from the standard deviations of the fit.