Electron density of states and energy relaxation time in magnetic field

Temperature and sample size dependences of the electron density of states and energy relaxation time in disordered metallic systems are obtained. It is shown that in one ( d = 1) dimension case energy relaxation time increases with the decreasing of the quasiparticle energy so slow that the quasiparticle description (Fermi-liquid theory) fails in the limit T→O. It is shown that there is essential magnetic field dependence of the electron-electron relaxation time and electron density of states in the classically small magnetic field.