Left panel: Spectra of 3He++ and 4He+++ ions accelerated in impulsive flares [Paesold et al., 2003]; middle panel: The spectra of suprathermal H, He, CNO, and Fe during the passage of the two shocks.
Right panel: The 3He/4He ratio derived from STOF PHA data (open squares) and HSTOF rates data (solid triangles) for the same period [Bamert et al., 2004b]; the line indicates the theoretical ratio.