Submillimeter Spectrum and Analysis of Vibrational and Hyperfine Coupling Effects in (HI)2
Laurent H. Coudert, Sergei P. Belov, F. Willaert, B. McElmurry, R. Lucchese, John W. Bevan, Jon T. Hougen
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) °.
, Belov, S.
, Willaert, F.
, McElmurry, B.
, Lucchese, R.
, Bevan, J.
and Hougen, J.
Submillimeter Spectrum and Analysis of Vibrational and Hyperfine Coupling Effects in (HI)2, Chemical Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=903808
(Accessed September 21, 2023)