Abstract
Local perturbations observed in the 0111 (Πg)→0110 (Πu) hot bands of 64ZnH2, 66ZnH2, 68ZnH2, 64ZnD2 and 66ZnD2 have been analyzed. The 0111 (Πg) state is perturbed by the nearby 040 vibrational level that contains 0440 (Γg), 0420 (Δg) and 0400 (Σg+) states. Appropriate Hamiltonian matrices were constructed in which the effects of rotational ℓ-type doubling, ℓ-type resonance and Coriolis interaction were taken into account, and nonlinear least squares fits were performed. Unperturbed constants were obtained for the 0111 (Πg) states, along with vibrational energies of the 040 (perturbing) levels and the Coriolis interaction coefficients. Relative vibrational energies of the 040 and 030 levels were then used to estimate the origins of the bending mode fundamental bands, resulting in ν2 vibrational wavenumbers of 634.45cm−1 and 459.14cm−1, for 64ZnH2 and 64ZnD2, respectively.
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