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|Author(s):||Laurent H. Coudert; Sergei P. Belov; F. Willaert; B. McElmurry; R. Lucchese; John W. Bevan; Jon T. Hougen;|
|Title:||Submillimeter Spectrum and Analysis of Vibrational and Hyperfine Coupling Effects in (HI)2|
|Published:||October 01, 2009|
|Abstract:||Observed rotational-vibrational transitions of HI dimer in the geared bending mode, centered at 511.9 GHz, are reported. This ~50 kHz high resolution spectrum was recorded using a co-axially configured pulsed jet submillimeter spectrometer and the hyperfine structure of R(J) and P(J) transitions from the quadrupole moments of iodine nuclei are completely resolved for low J transitions. An analysis of the hyperfine patterns was carried out using a theoretical approach accounting for the large amplitude motion effects and for hyperﬁne matrix elements within and between vibrational states. The submillimeter analysis is consistent with a vibrationnally averaged ground state Rcm = 4.56372(1) Å and average bending angle theta = 46.405(1) °.|
|Citation:||Chemical Physics Letters|
|Pages:||pp. 180 - 188|
|Keywords:||(HI)2, High-Resolution Spectrum, Submillimeter Spectrum, Quadrupole Coupling|
|Research Areas:||Physics, Chemical Physics, Molecular Spectroscopy|
|PDF version:||Click here to retrieve PDF version of paper (293KB)|