dorsal/arxiv
View SchemaRovibronic energy levels for triplet electronic states of molecular deuterium
| Authors | B. P. Lavrov, I. S. Umrikhin |
|---|---|
| Categories | |
| ArXiv ID | physics/0703114 |
| URL | https://arxiv.org/abs/physics/0703114 |
Abstract
An optimal set of 1050 rovibronic energy levels for 35 triplet electronic states of $D_2$ has been obtained by means of a statistical analysis of all available wavenumbers of triplet-triplet rovibronic transitions studied in emission, absorption, laser and anticrossing spectroscopic experiments of various authors. We used a new method of the analysis (Lavrov, Ryazanov, JETP Letters, 2005), which does not need any \it a priori \rm assumptions concerning the molecular structure being based on only two fundamental principles: maximum likelihood and Rydberg-Ritz. The method provides the opportunity to obtain the estimation of uncertainties of experimental wavenumbers independent from those presented in the original papers. 234 from 3822 published wavenumber values were found to be spurious, while the remaining set of the data may be divided into 19 subsets of uniformly precise data having close to normal distributions of random errors within the subsets. New wavenumber values of 125 questionable lines were measured in the present work (20-th subset). Optimal values of the rovibronic levels were obtained from the experimental data set consisting of 3713 wavenumber values (3588 old and 125 new). The unknown shift between levels of ortho- and para- deuterium was found by least squares analysis of the $a^3\Sigma_g^+$, $v = 0$, $N = 0 \div 18$ rovibronic levels with odd and even values of N. All the energy levels were obtained relative to the lowest vibro-rotational level ($v = 0$, N=0) of the $a^3\Sigma_g^+$ electronic state and presented in tabular form together with standard deviations (SD) of the semi-empirical determination. New energy level values differ significantly from those available in literature.
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"abstract": "An optimal set of 1050 rovibronic energy levels for 35 triplet electronic\nstates of $D_2$ has been obtained by means of a statistical analysis of all\navailable wavenumbers of triplet-triplet rovibronic transitions studied in\nemission, absorption, laser and anticrossing spectroscopic experiments of\nvarious authors. We used a new method of the analysis (Lavrov, Ryazanov, JETP\nLetters, 2005), which does not need any \\it a priori \\rm assumptions concerning\nthe molecular structure being based on only two fundamental principles: maximum\nlikelihood and Rydberg-Ritz. The method provides the opportunity to obtain the\nestimation of uncertainties of experimental wavenumbers independent from those\npresented in the original papers. 234 from 3822 published wavenumber values\nwere found to be spurious, while the remaining set of the data may be divided\ninto 19 subsets of uniformly precise data having close to normal distributions\nof random errors within the subsets. New wavenumber values of 125 questionable\nlines were measured in the present work (20-th subset). Optimal values of the\nrovibronic levels were obtained from the experimental data set consisting of\n3713 wavenumber values (3588 old and 125 new). The unknown shift between levels\nof ortho- and para- deuterium was found by least squares analysis of the\n$a^3\\Sigma_g^+$, $v = 0$, $N = 0 \\div 18$ rovibronic levels with odd and even\nvalues of N. All the energy levels were obtained relative to the lowest\nvibro-rotational level ($v = 0$, N=0) of the $a^3\\Sigma_g^+$ electronic state\nand presented in tabular form together with standard deviations (SD) of the\nsemi-empirical determination. New energy level values differ significantly from\nthose available in literature.",
"arxiv_id": "physics/0703114",
"authors": [
"B. P. Lavrov",
"I. S. Umrikhin"
],
"categories": [
"physics.optics",
"physics.chem-ph"
],
"title": "Rovibronic energy levels for triplet electronic states of molecular deuterium",
"url": "https://arxiv.org/abs/physics/0703114"
},
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