The B(1/2 2P3/2)→X(1/2 2Σ+) transition in XeI.
In: Journal of Chemical Physics, Jg. 105 (1996-07-22), Heft 4, S. 1330-1340
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Zugriff:
The B(1/2 2P3/2)→X(1/2 2Σ+) transition in XeI (2385–2490 Å) is recorded at high resolution for the single isotopomer 136Xe127I, using a Tesla discharge source and a CCD array detector. The high signal-to-noise capabilities of the detector make it possible to measure the discrete vibrational structure in this system for the first time. The assignments consist of 86 v′–v″ bands spanning 15 upper-state levels (assigned as v′=3–17) and 17 lower-state levels (tentatively assigned as v″=0–16). A vibrational analysis yields the following spectroscopic constants (cm-1): ΔTe=40 047.8, ωe′=110.6, ωexe′=0.217, ωe″=24.0, ωexe″=0.66. From a near-dissociation analysis, the X state has a dissociation energy (De) of 267±5 cm-1 and supports 28 bound vibrational levels. However, it is likely that our lowest observed v″ level is not v″=0, so these values should be considered lower limits. The potential energy curves are modeled by a Morse–RKR function for the X state and a Rittner function for the B state. Trial-and-error Franck–Condon calculations are used to locate the B- and X-state potential curves relative to each other, fixing the X-state internuclear distance Re at a value ∼0.7 Å larger than that for the B state. Bound–free simulations of the low-resolution spectrum indicate that the X potential must be significantly steeper in the Franck–Condon region than found from previous scattering studies. © 1996 American Institute of Physics. [ABSTRACT FROM AUTHOR]
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Titel: |
The B(1/2 2P3/2)→X(1/2 2Σ+) transition in XeI.
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Autor/in / Beteiligte Person: | Radzykewycz, Dan T. ; Tellinghuisen, Joel |
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Zeitschrift: | Journal of Chemical Physics, Jg. 105 (1996-07-22), Heft 4, S. 1330-1340 |
Veröffentlichung: | 1996 |
Medientyp: | academicJournal |
ISSN: | 0021-9606 (print) |
DOI: | 10.1063/1.471999 |
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