Generalized Lenard-Balescu calculations of electron-ion temperature relaxation in beryllium plasma

The problem of electron-ion temperature relaxation in beryllium plasma at various densities (0.185-18.5 g/cm(3)) and temperatures [(1.0-8) x10(3) eV] is investigated by using the generalized Lenard-Balescu theory. We consider the correlation effects between electrons and ions via classical and quantum static local field corrections. The numerical results show that the electron-ion pair distribution function at the origin approaches the maximum when the electron-electron coupling parameter equals unity. The classical result of the Coulomb logarithm is in agreement with the quantum result in both the weak (Gamma(ee) < 10(-2)) and strong (Gamma(ee) > 1) electron-electron coupling ranges, whereas it deviates from the quantum result at intermediate values of the coupling parameter (10(-2) < Gamma(ee) < 1). We find that with increasing density of Be, the Coulomb logarithm will decrease and the corresponding relaxation rate nu(ie) will increase. In addition, a simple fitting law nu(ie) / nu((0))(ie) = a(rho(Be)/rho(0))(b) is determined, where nu((0))(ie) is the relaxation rate corresponding to the normal metal density of Be and rho(0), a, and b are the fitting parameters related to the temperature and the degree of ionization < Z > of the system. Our results are expected to be useful for future inertial confinement fusion experiments involving Be plasma.National Natural Science Foundation of China [11275032, 11575032, 11205019, 11304009, U1530258]; Foundation for the Development of Science and Technology of CAEP [2014B0102015]; China Postdoctoral Science Foundation [2014T70029]SCI(E)EIPubMedARTICLEzhang_ping@iapcm.ac.cn30331039