Adiabatic collisions 128
Alkali-halides 107
Alpha particles, scattering in helium 97
Alpha-decay of nuclei 147
Antisymmetrical wave functions 92
Atomic scattering factor 105
Auger effect 139
Band spectra 54
Bessel's equation 5
Beta-decay of nuclei 150
Bohr's magneton 80
Bohr's quantum theory 53
Born's interpretation of the wave function 40
Collision problems 30 123 142
Conduction bands in solids 114 116
Conservation of charge 27
Covalent forces 107
Davisson and Germer, experiments of 21
De Broglie wave-length 22
dielectric constant 77
Diffraction of electrons 21
Dirac's radiation theory 133
Dirac's theory of spinning electron 143
Dispersion Formula 76
Effective mass of electrons 115
Einstein A and B coefficients 132
Exchange integral 100 113
Fermi — Dirac statistics 119
Fermi's theory of  -decay 151
Franck — Condon principle 91
Gamow's theory of a-decay 147
Geiger — Nuttal law 150
Gerlach and Stern's experiment 81
Group velocity 12 43
Gyromagnetic effect 82
Hamiltonian operator 46
Hartree's method of self-consistent fields 68 106
Heisenberg's uncertainty principle 50
Helium atom 68 70 99
Hydrogen atom, motion of proton in 54 87
Hydrogen molecular ion 108
hydrogen molecule 112
Hydrogen molecule, rotational states 54 92
Hydrogen, atomic spectrum 62
Legendre polynomials 19
London — Heitler method 112
| Mean free path of electrons in metals 115
Methane, wave functions for 114
Molecular orbitals 112
Molecular spectra 88
Morse potential 92
Neutrino 151
Nuclear radius 150
Orthogonal property of wave functions 70
Orthohelium 101
Orthohydrogen 98
Oscillator strengths 76 127 136
Parahelium 101
Parahydrogen 98
Pauli principle 96 103
photoelectric effect 138 144
Planck's radiation theory 132
Polarisibility of atoms 74
Positron 144
Reflection of waves 8 30
Refraction of waves 11 27
Refractive index, imaginary value of 10
Relativity, principle of 83 143 144 151
Rotational states 54 88
Rutherford's scattering formula 38
Scattering of electrons by atoms 36 142
Scattering of light by atoms 77
Selection rules 137
Self-consistent field, method of 68 106
Semi-conductors 116
Silicon 117
Simple harmonic oscillators 58
Spin doublets 83
Spinning electron 81
Spinning electron, Dirac's theory of 143
Stark effect 78
Strong field emission 120
Symmetrical wave functions 92
Thomas — Fermi method 106
Thomson, G.P., experiments of 21
Transition probabilities 136
Tunnel effect 32 120 148
Van der Waals' forces 106
Variational methods 69
Wentzel — Kramers — Brillouin method 3 28 35 59 66 148
work function 119
X-ray spectra 54 103 119
Zeeman effect 79
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