## Theory of Molecular Spectra |

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### Contents

Introduction | 1 |

Pure Rotation Spectra 1 | 15 |

Electronic Band Spectra of Diatomic Molecules | 49 |

Copyright | |

6 other sections not shown

### Common terms and phrases

absorption spectrum according to equation According to Table anharmonic antibonding AO's approximation band system bending vibration bond angle component correlation diagram corresponding described determined diagram of Fig diatomic molecules different from zero dipole dissociation energy electronic transition emission emission spectrum equilibrium distance excited experimental factor Franck-Condon principle geometry given gives ground heteronuclear homonuclear molecules intensity internuclear axis internuclear distance isotope linear molecules lower lowest MO configuration MO's molecular terms NH molecule normal vibrations nuclear charge nuclei observed obtained occur one-electron orbital perpendicular polyatomic molecules potential energy curves principal quantum pure rotation Q branch quantum-mechanical rotation spectrum rotational analysis rotational constants rotational lines rotational quantum number rotational terms Section selection rules separated atoms shown in Fig spectra spectroscopy stable symmetric top symmetry species Table 14 term symbols theory total energy united atom upper valence electrons values vector vibrational levels vibrational motion vibrational transition Walsh diagram wave functions wave numbers wavelengths