## Molecular PhysicsThe richly illustrated, advanced textbook comprehensively explains the important principles of diatomic and polyatomic molecules and their spectra in two distinct parts. The first concentrates on the theoretical aspects of molecular physics, such as the vibration, rotation, electronic states, potential curves, and spectra of molecules, while also covering the different methods of approximation for the calculation of electronic wave functions and their energy. The introduction of basic terms used in group theory and their meaning in molecular physics enables an elegant description of polyatomic molecules and their symmetries. A whole chapter is devoted to molecular spectra and the dynamic processes involved in their excited states. The theoretical section concludes with a discussion of the field of Van der Waals molecules and clusters. The second part is devoted entirely to experimental techniques, such as laser, Fourier, NMR, and ESR spectroscopies, used in the fields of physics, chemistry, biology, and material science. Time-resolved measurements and the influence of chemical reactions by coherent controls are also treated, and a list of general textbooks and specialized literature is provided for further reading. With its specific examples, definitions, and integrated notes to aid understanding, this textbook is suitable for undergraduates and graduates in physics and chemistry with a knowledge of atomic physics and who are familiar with the basics of quantum mechanics. |

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### Contents

Molecular Electronic States | 15 |

Rotation Vibration and Potential Curves of Diatomic Molecules | 79 |

Spectra of Diatomic Molecules | 121 |

Copyright | |

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### Common terms and phrases

angle antisymmetric approximation atomic orbitals beam bending vibration Born-Oppenheimer approximation calculated clusters coefficients collision components configuration coordinates corresponding density depends described determined diatomic molecules dipole dissociation electron configuration electronic transition emission energy levels example excited experimental fluorescence frequency Hamiltonian harmonic Hence hybrid hydrogen atoms infrared integral intensity interaction internuclear distance ionization kinetic energy laser linear combination linear molecule linewidth magnetic field matrix element measured molecular axis molecular orbitals molecular physics Morse potential normal vibrations nuclear framework nuclear spin nuclei obtain oscillator perturbation photon plane point group polyatomic molecules potential curves potential energy radiation Raman representation resonance rigid rotor rotational constant rotational energy rotational levels rotational quantum number Rydberg Schrodinger equation Sect selection rules shifts spectral spectroscopy spectrum splitting structure symmetric top symmetry axis symmetry operations symmetry type term values tion total angular momentum transition probability two-photon vector velocity vibrational energy vibrational levels wavefunctions wavenumbers Zeeman Zeeman splitting