Local mode behavior in H2Te

Coudert, L. H.; Tine, M.; N'Gom, H.; Bürger, H.
October 2007
Journal of Chemical Physics;10/7/2007, Vol. 127 Issue 13, p134304
Academic Journal
A high-resolution spectrum of hydrogen telluride (H2Te) was recorded in the 4050–7000 cm-1 region. Two bands could be observed at 4900 and 5980 cm-1 and were assigned as the (20±,1)←(00+,0) and (30±,0)←(00+,0) bands, respectively. Rotational transitions of the two bands were assigned for the most abundant H2130Te and H2128Te isotopic species. Line position analyses were carried out to investigate a possible local mode behavior. For the first time we found in H2Te strong experimental evidence for such a behavior for the higher-lying band as its two upper vibrational states are only 0.027 and 0.032 cm-1 apart for the H2130Te and H2128Te isotopic species, respectively.


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