(英)坦尼森

Preface

1.Why Record Spectra of Astronomical Objects?
1.1 A Historical Introduction
1.2 What One Can Learn from Studying Spectra

2.The Nature of Spectra
2.1 Transitions
2.2 Absorption and Emission
2.3 Other Measures of Transition Probabilities
2.4 Stimulated Emission
2.5 Optical Depth
2.6 Critical Density
2.7 Wavelength or Frequency?
2.8 The Electromagnetic Spectrum

3.Atomic Hydrogen
3.1 Overview
3.2 The Schrodinger Equation of Hydrogen-Like Atoms
3.3 Reduced Mass
3.4 Atomic Units
3.5 Wavefunctions for Hydrogen
3.6 Energy Levels and Quantum Numbers
3.7 H-Atom Discrete Spectra
3.8 H-Atom Spectra in Different Locations
3.8.1 Balmer series
3.8.2 Lyman series
3.8.3 Infrared lines
3.9 H-Atom Continuum Spectra
3.9.1 Processes
3.9.2 H-atom emission in H II regions
3.10 Radio Recombination Lines
3.11 Radio Recombination Lines for Other Atoms
3.12 Angular Momentum Coupling in the Hydrogen Atom
3.13 The Fine Structure of Hydrogen
3.14 Hyperfine Structure in the H Atom
3.15 Allowed Transitions
3.16 Hydrogen in Nebulae

4.Complex Atoms
4.1 General Considerations
4.2 Central Field Model
4.3 Indistinguishable Particles
4.4 Electron Configurations
4.5 The Periodic Table
4.6 Ions
4.7 Angular Momentum in Complex Atoms
4.7.1 L-S or Russell-Saunders coupling
4.7.2 j-j coupling
4.7.3 Why two coupling schemes?
4.8 Spectroscopic Notation
4.9 Parity of the Wavefunction
4.10 Terms and Levels in Complex Atoms

5.Helium Spectra
5.1 He I and He II Spectra
5.2 Selection Rules for Complex Atoms
5.3 Observing Forbidden Lines
5.4 Grotrian Diagrams
5.5 Potential Felt by Electrons in Complex Atoms
5.6 Emissions of Helium-Like Ions

6.Alkali Atoms
6.1 Sodium
6.2 Spin-Orbit Interactions
6.3 Fine Structure Transitions
6.4 Astronomical Sodium Spectra
6.5 Other Alkali Metal-Like Spectra

7.Spectra of Nebulae
7.1 Nebulium
7.2 The Bowen Mechanism
7.3 Two Valence Electrons
7.4 Autoionisation and Recombination

8.Spectra in Magnetic Fields
8.1 Uniform Magnetic Field
8.2 Strong Magnetic Field
8.3 Weak Magnetic Field
8.3.1 The normal Zeeman effect
8.3.2 The anomolous Zeeman effect
8.4 Spectra in Magnetic Field

9.X-Ray Spectra
9.1 Inner Shell Processes
9.2 The Solar Corona
9.3 The Structure of Highly Ionised Atoms
9.4 Isotope Effects

10.Molecular Structure
10.1 The Born-Oppenheimer Approximation
10.2 Electronic Structure of Diatomics
10.2.1 Labelling of electronic states
10.2.2 Symmetry
10.2.3 State labels
10.3 Schrodinger Equation
10.3.1 Nuclear motion in diatomic molecules
10.4 Fractionation
10.5 Vibration-Rotation Energy Levels
10.6 Temperature Effects
10.6.1 Rotational state populations
10.6.2 Vibrational state populations
10.6.3 Electronic state populations

11.Rotational Spectra
11.1 Rotational Structure of Polyatomic Molecules
11.2 Selection Rules: Pure Rotational Transitions
11.3 Selection Rules
11.4 Isotope Effects
11.5 Rotational Spectra of Other Molecules
11.6 Rotational Spectra of Molecular Hydrogen
11.7 Maser Emissions

12.Vibration-Rotation Spectra
12.1 Vibrations in Polyatomic Molecules
12.2 Vibrational Transitions
12.2.1 Structure of the spectrum
12.2.2 Isotope effects
12.2.3 Hydrogen molecule vibrational spectra
12.3 Astronomical Spectra

13.Electronic Spectra of Diatomic Molecules
13.1 Electronic Transitions
13.2 Selection Rules
13.2.1 Vibrational selection rules
13.2.2 Rotational selection rules
13.3 Transition Frequencies
13.4 Astronomical Spectra
13.5 Non-E Electronic States

Solutions to Model Problems
Further Reading and Bibliography
Index