Analysis of the long range potential of iodine in the B 3Π +ou state

Gerstenkorn, S.; Luc, P.; Amiot, C.

doi:10.1051/jphys:01985004603035500

Cited by 58 publications

(71 citation statements)

References 31 publications

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“…7-9 we show in addition calculated spectra C and D, where the excited-state potentials have been shifted by a small amount to either smaller (spectra C) or larger (spectra D) nuclear distances. For exact values see the caption for (9) (obtained from absorption measurements) is -3.2 x 10-l2 m. If we continue the pure repulsive 3110+u potential curve into the bound region, it turns out that near the dissociation limit the repulsive turning points given by Barrow and Yee (12) as well as those from Gerstenkorn et al (16) differ by about -2.3 x 10-l2 m from the extrapolated repulsive values. To attach the bound potential curve to the repulsive part without discontinuity, we shifted the turning points of the bound part by this amount.…”

Section: Sensitivity To Position Of Excited State Potentialsmentioning

confidence: 94%

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Polarized and depolarized continuum resonance Raman scattering of molecular iodine: accurate determination of repulsive states

Strempel¹,

Kiefer²

1991

Can. J. Chem.

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.We have recorded high-resolution polarized and depolarized resonance Raman spectra of molecular iodine with excitation by argon-ion laser lines at 496.5, 488.0, and 476.5 nm up to the seventh, and with 457.9 nm up to the fifth, overtone. These spectra were also calculated numerically applying second-order perturbation theory. In contrast to earlier publications on this subject, special emphasis was put on obtaining highly reliable polarized and depolarized spectra. The variations of the spectral band shapes and depolarization ratios obtained at different excitation wavelengths could be explained by means of the specific contributions of the two excited electronic states 3no+, and Inlu. About 60 different experimentally obtained spectra were finally used to derive the positions of the two excited-state potentials involved in this type of light scattering. The derivation was done by comparison of the experimental and theoretically simulated spectra where parameters of the In,, as well as of the 3no+u state potentials were varied.

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Section: Sensitivity To Position Of Excited State Potentialsmentioning

confidence: 94%

“…In a more re-. , cent analysis Gerstenkorn et al (16) In this paper the repulsive of the potentials are calculated using an exponential function of the form…”

Section: Sensitivity To Position Of Excited State Potentialsmentioning

confidence: 99%

Polarized and depolarized continuum resonance Raman scattering of molecular iodine: accurate determination of repulsive states

Strempel¹,

Kiefer²

1991

Can. J. Chem.

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“…The parameters D e and C n are taken from literature [26][27][28], and the same values are taken for all isotopomers. This is justified because this part of the long range extension is far enough from the levels determined by the data that small changes like the atomic isotope shift do not introduce significant changes of the eigenvalues in the central part R I ≤ R ≤ R O of the potential within the present accuracy.…”

Section: Modeling Of the Spectramentioning

confidence: 99%

“…The structure of the iodine B-X spectrum was modeled by Gerstenkorn and Luc [9] with a Dunham parameter approach based on the frequencies of the lines in their atlases. Extensive Fourier-transform laser induced fluorescence spectra were taken and modeled in Dunham based descriptions by Cerny et al [10] for the three isotopomers 127 I 2 , 129 I 2 and 127 I 129 I.…”

Section: Introductionmentioning

confidence: 99%

Improved potentials and Born-Oppenheimer corrections by new measurements of transitions of 129I2 and 127I 129I in the B3 $\Pi_{\rm O^+_u}$ - X1 $\Sigma^+_{\rm g}$ band system

et al. 2008

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Abstract. The light from one single frequency cw laser was employed in a double saturation spectroscopy experiment to record high resolution spectra of 129 I2 and 127 I 129 I together with spectra of 127 I2 which is used as a simultaneous frequency reference. Two separate saturation spectroscopy set ups were used. The frequencies of lines of 129 I2 and 127 I 129 I were determined with respect to lines of 127 I2. More than 380 frequency differences between lines of 127 I2 and of the other isotopomers have been included in the data set. By a direct potential fit a precise description of the potential energy curves of the B and the X state and of effective Born-Oppenheimer correction functions valid for all three isotopomers of I2 are given.PACS. 33.15.Pw Fine and hyperfine structure -33.20.-t Molecular spectra -33.20.Kf Visible spectra

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“…The linear absorption lines of I2 are used as frequency references [14]: for each Mg transition we look for the nearest iodine absorption and record it together with the atomic beam fluorescence vs. the laser frequency. The transitions of concern in this work are schematically shown in fig.…”

Section: -Experimental Set-upmentioning

confidence: 99%

Fine structure and isotope shift of the 3s4d 3 D-3s3p 3 P, 3s5d 3 D-3s3p 3 P and 3p 2 3 P-3s3p 3 P Transitions of MgI

1992

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Summary. --We report the measurements of the 3D(3s4d)-3P(3s3p), 3D(3s5d)--ap(3s3p), and 3P(3p2)-3p(3s3p) transition frequency of MgI, the free-structure separation and isotope shift between 2aMg and 26Mg. The measurements have been performed in a metastable atomic beam; a good agreement is found for data already existing in the literature. The accuracy of the measurements reported in this paper is mainly limited by the Doppler broadening of the/2 transitions used as a reference and by the precision in the knowledge of the related wavelengths.PACS 32.30.Jc -Visible and ultraviolet spectra. High-resolution spectroscopic studies of the first-excited states of Mg have been performed mainly in recent years; the fine-structure splittings of the metastable triplet 8p(0) are reported in [l,2], the isotope shifts and hyperfine splittings in [3][4][5]. Moreover, the isotope shift and hyperfine splittings of the following transitions have been measured: 3s4s 8S-3s3p 3p [6,7], the 3s3d 3D-3s3p 3p [8,9], the 3s4d 3D-3s3p 8p [9] and 3s 21S o-3s3p 1P 1 [10].The transitions between the terms Sp(3p2), ~D(3s4d), and SD(3s5d), and the term 3p(0) (3s3p) of MgI fall in the (277 + 310) nm wavelength range, covered by frequency duplication of the rhodamine dyes.A high-resolution investigation of these terms is interesting in order to complete the literature data. In fact, except for the 3D(3s4d) fine-structure splittings, already cited above, the major work on the matter remains the one of Risberg [ll] who measured about 160 lines of MgI and whose data make the body of a critically compiled collection of energy levels of MgI [12]. That work was performed with classical hollow-cathode discharge lamps and isotope shifts were not resolved. We have performed the measurements in a metastable atomic beam which assures a sub-Doppler resolution to the experiment. The source of radiation is a commercial 955

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Analysis of the long range potential of iodine in the B 3Π +ou state

Cited by 58 publications

References 31 publications

Polarized and depolarized continuum resonance Raman scattering of molecular iodine: accurate determination of repulsive states

Polarized and depolarized continuum resonance Raman scattering of molecular iodine: accurate determination of repulsive states

Improved potentials and Born-Oppenheimer corrections by new measurements of transitions of 129I2 and 127I 129I in the B3 $\Pi_{\rm O^+_u}$ - X1 $\Sigma^+_{\rm g}$ band system

Fine structure and isotope shift of the 3s4d 3 D-3s3p 3 P, 3s5d 3 D-3s3p 3 P and 3p 2 3 P-3s3p 3 P Transitions of MgI

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