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

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

2011-12-02

arxiv.org/abs/1112.0477v2

Physics

Chemical Physics

6 pages, including 2 figures and 1 table; submitted to Phys.Rev.Lett

Scientific paper

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 $^3\Lambda_g^\pm \to c^3\Pi_u^-$ 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 $c^3\Pi_u^-$ state.

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