Using instruments on the ACE and Wind spacecraft, we investigate the temporal
evolution, spectrum, and ionization states of Solar Energetic Particle (SEP) Fe in
the impulsive event of 2000 May 1. Proton and electron intensities and anisotropies
were used to help constrain the characteristics of the interplanetary propagation
taking account of focusing, pitch-angle scattering, adiabatic decele
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