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arXiv · 1112.0477

Observation of the fine structure for rovibronic spectral lines in visible part of emission spectra of $D_2$

B. P. Lavrov·I. S. Umrikhin·A. S. Zhukov
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Abstract

For the first time in visible part of the $D_2$ emission spectrum the pseudo doublets representing partly resolved fine structure of rovibronic lines have been observed. They are characterized by splitting values about 0.2 cm$^{-1}$ and relative intensity of the doublet components close to 2.0. It is shown that they are determined by triplet splitting in lower rovibronic levels of various $^3Λ_g^\pm \to c^3Π_u^-$ electronic transitions. It is proposed to use an existence of such partly resolved fine structure patterns for identification of numerous unassigned spectral lines of the $D_2$ molecule coming from great variety of triplet "gerade" electronic states to vibro-rotational levels of the $c^3Π_u^-$ state.

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B. P. Lavrov, I. S. Umrikhin, A. S. Zhukov. 2012-03-12. Observation of the fine structure for rovibronic spectral lines in visible part of emission spectra of $D_2$. https://doi.org/10.1103/physreva.85.052505

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