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Book

Cover Atomic Spectra
Atomic Spectra starts off by looking at quantum mechanics and the relationship of quantum mechanics with light. The next chapter considers the structure and spectrum of the hydrogen atoms. The text also covers the spectrum of the helium atom. Finally, the text examines the spectra of many-electron atoms.

Chapter

Cover Instrumental Analysis (International Edition)

Quantum Mechanics and Spectroscopy  

This chapter reviews the basic quantum mechanics of spectroscopy, analyzing forms of spectroscopy based on the measurement of energy as an atom or molecule undergoes a change in quantum states. It looks at different aspects of quantum mechanics in order to understand instrumental techniques and analysis involving the interaction of light and matter. It also looks at how spectroscopy explores particular energy level differences between quantum states in molecules and atoms. The chapter stresses the importance of quantum mechanics in the development of spectroscopic techniques used to investigate atomic composition and chemical structures. It cites an example that outlines the quantum mechanic events that led to the line spectrum of hydrogen in a gas in a discharge tube.

Book

Cover Instrumental Analysis (International Edition)

Robert M. Granger, Hank M. Yochum, Jill N. Granger, Karl D. Sienerth, Robert M. Granger, Hank M. Yochum, Jill N. Granger, and Karl D. Sienerth

Instrumental Analysis XE begins by presenting the analyst's toolbox. The next chapter covers quantum mechanics and spectroscopy. Other topics include optics, instrumental electronics, signals and noise and signal processing, molecular ultraviolet and visible spectroscopy, and atomic absorption spectroscopy. The text then goes on to cover luminescence spectroscopy, atomic emission spectroscopy, infrared spectroscopy, and raman spectroscopy. There are also chapters on mass spectroscopy, nuclear magnetic resonance spectroscopy, and liquid chromatography. Next, there are chapters on gas chromatography and electrophoresis. Finally, the text looks at potentiometry and probes and statistical data analysis.

Chapter

Cover Atomic Spectra

Quantum mechanics and light  

This chapter provides a brief overview of quantum mechanics and light. It begins with a discussion on the purpose and practice of spectroscopy, which involves the investigation of the interaction of light with matter. It then breaks down the nature of electromagnetic radiation, expounding on the classical theory of light before turning to photons and how they make up light. Next, the chapter elaborates on the properties of lasers and how these same remarkable properties are achieved largely from the process of stimulated emission. Afterward, the chapter presents the wave mechanical description of an atom, and considers the Schrödinger equation and the Hamiltonian operator. Lastly, angular momentum is explored.

Book

Cover Molecular Spectroscopy
Molecular Spectroscopy provides an introduction to the spectroscopy of diatomic molecules. Following a general introduction to the subject, the second chapter lays out the essential quantum mechanical tools required to understand spectroscopy. The following chapter uses this quantum mechanical framework to establish the selection rules which govern spectroscopic transitions. Chapters 4–7 describe the various branches of spectroscopy covered by the book; rotational, rotational—vibrational, Raman, and electronic spectroscopy. Quantum mechanics is used to derive formulae for the various energy levels involved and for the relative intensities of different types of transition. From these, the appearances of the different types of spectra are derived. The molecular parameters on which these spectra depend are defined and the structural information which can be derived from these is discussed.