  Energetic particles that undergo strong pitch-angle scattering and diffuse
through a plasma containing strong compressible MHD turbulence undergo
diffusion in momentum space with diffusion coefficient Dp. In this paper, the
contribution of slow modes to Dp is calculated assuming the rms turbulent
velocity is of order the Alfven speed. The energy spectrum of accelerated
particles is derived assuming slow modes make the dominant contribution to Dp,
taking into account Coulomb losses and particle escape from the acceleration
region with an energy-independent escape time. The results are applied to solar
flares.
