It is shown that the Landau-Spitzer theory for temperature relaxation between electrons and ions, which was originally derived for ideal plasmas, is in fact more general. A relaxation formula is derived, for arbitrary ion-ion coupling that follows from elementary considerations combined with the fluctuation-dissipation theorem and the f-sum rule. The conditions for the validity of this theory are weak electron-ion coupling and that the spectrum of fluctuations of the ions lies at energies far below the resonances of the electrons spectrum. It is found that the rate of energy relaxation is not sensitive to the details of the ion-excitation spectrum. For classical electrons the formula reduces to the Landau-Spitzer form with minor modifications.
2. The Wilson band-overlap transition . 3. Mott-Hubbard insulators . 4. Kohn's proof of the insulating property. 5. Slater's description of Mott-Hubbard insulators . 6. Spin polarons . 7. Behaviour near the metal-nonmetal transition point 8. Hubbard's Hamiltonian . 9. Magnetic moments . 10. Effect of the long-range forces 11. Wigner crystallization . 12. T h e excitonic insulator . 13. Kohn's model for the Mott transition . 14. The term in the resistivity proportional to T 2 . 15. The metal-nonmetal transition in disordered systems; the Wilson band 16. The metal-nonmetal transition in disordered systems; the Mott 17. Metal-ammonia solutions . 18. Resistance and magnetoresistance of crystalline Li(NH,), . 19. Transition metal oxides, sulphides and selenides . . overlap transition . transition ..
The energy loss of energetic protons in heavy metal targets is calculated at temperatures and densities of interest for pellet fusion. The contributions of bound and free electrons to the stopping power are considered. It is found that in the temperature range of interest the increase in the number of free electrons in the target plasma causes range shortening with increasing temperatures and specific volumes. In order to study this effect on the ablation process, a one-dimensional calculation of the hydrodynamic flow with energy deposition was carried out.
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