6 research outputs found
VUV Fourier-transform absorption study of the Lyman and Werner bands in D2
Get PDFAn extensive survey of the D2 absorption spectrum has been performed with the
high-resolution VUV Fourier-transform spectrometer of the DESIRS beamline at
the SOLEIL synchrotron. The frequency range of 90 000-119 000 cm-1 covers the
full depth of the potential wells of the B 1{\Sigma}+u, B' 1{\Sigma}+u, and C
1{\Pi}u electronic states up to the D(1s) + D(2\ell) dissociation limit.
Improved level energies of rovibrational levels have been determined up to
respectively v = 51, v = 13, and v = 20. Highest resolution is achieved by
probing absorption in a molecular gas jet with slit geometry, as well as in a
liquid helium cooled static gas cell, resulting in line widths of ~0.35 cm-1.
Extended calibration methods are employed to extract line positions of D2 lines
at absolute accuracies of 0.03 cm-1. The D1{\Pi}u and B" 1{\Sigma}+u electronic
states correlate with the D(1s) + D(3\ell) dissociation limit, but support a
few vibrational levels below the second dissociation limit, respectively v =
0-3 and v = 0-1, and are also included in the presented study. The complete set
of resulting level energies is the most comprehensive and accurate data set for
D2. The observations are compared with previous studies, both experimental and
theoretical.Comment: 13 pages, 6 figures. The second set of Tables (Tables I-IV after the
references), is auxiliary materia
Synchrotron vacuum ultraviolet radiation studies of the D-1 Pi(u) state of H-2 (Correction of vol 133, 144317, 2010)
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