Knowledge Bank

The vibration-rotation absorption bands $v2$, 2$v2$, 3$v2$, $v1$ and $v3$ of $H2Te$ have been analyzed using high resolution Fourier transform spectra of natural and $\mathrm{<mrow\; data-mjx-texclass="ORD">130</mrow>}Te$ monoisotopic material. The rotational levels of the upper states ($v1v2v3)=(010),(020)$ and (030) have been very satisfactorily fit using a Watson-type Hamiltonian. It proved however necessary to include Coriolis interaction terms in the Hamiltonian matrix to calculate to within the experimental accuracy ($0.0002cm-1$) the rotational levels of the two interacting state (100) and (001). From these fits, accurate upper states Hamiltonian constants have been derived for the seven most abundant tellurium isotopes. These constants have then been used to derive a preliminary equilibrium structure for $H2Te$.