Theory of Molecular Spectra |
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a₁ absorption spectrum according to equation According to Table angular momentum antibonding AO's approximation B₁ B₂ band system bond angle component correlation diagram corresponding determined diagram of Fig diatomic molecules different from zero dipole electronic transition emission emission spectrum equilibrium distance excited experimental factor Franck-Condon principle geometry given gives ground H₂ homonuclear molecules intensity internuclear axis internuclear distance isotope linear molecules lowest M₁ Mn'n MO configuration MO's molecular terms moments of inertia normal vibrations nuclear charge nuclei observed obtained occur orbital polyatomic molecules potential energy curves pure rotation Q branch quantum-mechanical rotation spectrum rotation-vibration rotational analysis rotational constants rotational lines rotational quantum number rotational terms Schrödinger equation Section selection rules separated atoms shown in Fig spectra symmetry species Table 14 total energy united atom upper valence electrons values vector vibrational levels vibrational transition Walsh diagram wave functions wave numbers wavelengths ΣΤ