## Basic Atomic and Molecular SpectroscopyThe main aim of this unique book is to introduce the student to spectroscopy in a clear manner which avoids, as far as possible, the mathematical aspects of the subject. It is thus intended for first or second year undergraduates, particularly those with minimal mathematics qualifications. After explaining the theory behind spectroscopy, the book then goes on to look at the different techniques, such as rotational, vibrational and electronic spectroscopy. It encompasses both high resolution (structural) and low resolution (analytical) spectroscopy, demonstrating their close interrelationship. The many worked problems make this book particularly appealing for independent study. Ideal for the needs of undergraduate chemistry students, Tutorial Chemistry Texts is a major new series consisting of short, single topic or modular texts concentrating on the fundamental areas of chemistry taught in undergraduate science courses. Each book provides a concise account of the basic principles underlying a given subject, embodying an independent-learning philosophy and including worked examples. |

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### Contents

What is Spectroscopy? | 1 |

The Electromagnetic Spectrum | 8 |

Quantization and the Hydrogen Atom | 17 |

Quantization in Polyelectronic Atoms | 31 |

Molecular Vibrations | 75 |

Molecular Rotation | 91 |

How Spectra are Obtained | 100 |

Rotational Spectroscopy | 110 |

Vibrational Spectroscopy | 126 |

Molecules | 139 |

Electronic Spectroscopy | 146 |

Further Reading | 171 |

182 | |

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### Common terms and phrases

absorption spectrum anharmonic antibonding approximation asymmetric top molecules atomic orbitals bending vibration benzene bond length bond order centrifugal distortion coupling diatomic molecule electron spin electronic spectra electronic transition equation ethyne example excited electronic far-infrared frequency gas phase give ground configuration ground electronic ground term helium homonuclear diatomic molecules Hund's hydrogen atom inertia intensity internuclear axis involved labelled linear polyatomic molecule lines microwave millimetre wave molecular moment of inertia multiplet nuclear spin nuclei oblate symmetric top observed obtained orbital angular momentum potential energy curve prism quantum mechanical quantum number R-branch radiation Raman scattering Raman spectra Raman spectroscopy region respectively result rotational constant rotational energy levels rotational fine structure rotational term values rotational transitions selection rule shown in Figure shows singlet spin angular momenta stretching vibration sub-shell symmetric top tion triplet vector vibration wavenumber vibrational levels vibronic transitions wave functions wavelength wavenumber