With inner radiation belt AKEBONO whistle wave parameter statistics model and background cold electron density model changed with altitude, as 1.4 ≤ L ≤ 2.0 electron bounce-averaged equator pitch angle diffusion coefficients due to Coulomb collision and wave-particle resonance interaction are calculated by using quasi-linear diffusion theory. Influences of interaction mechanisms, whistle wave types such as hiss, lightning-generated whistlers (LG), artificial very low frequency(VLF), energies and magnet shell parameter(L) on inner radiation belt energetic electrons diffusing loss are analyzed. It shows that Coulomb collision caused by atmosphere plays a dominant role in energetic electrons diffusion around equator loss cone angle, while hiss and LG are main diffusion factors near 90° of equator pitch angle. Wave-particle resonance diffusion caused by VLF plays a dominant role in inner radiation belt. Diffusion coefficients is sensitive to energetic electron energy and L. Usually, the greater the L or electron energy, the more significant the electron resonance diffusion coefficient is.

With Fokker-Plank equation of pitch-angle diffusion,a numerical method for atmospheric diffusion loss of radiation belt trapped electrons is shown.Flux and energy spectrum are calculated as atmospheric scattering of fission β spectrum electrons injected in radiation belt by high altitude nuclear detonation.Diffusion due to atmospheric scattering is remarkable as L < 1.3.Low energy electrons are removed more rapidly than those with high energy.Electron flux decays rapidly at an initial phase and then decays gradually as an exponential function of time.