Enhanced Abundances of Low-Energy Heavy Elements in Solar Cosmic Rays

Abstract

Measurements of solar cosmic-ray 0/He, Si/He, and Fe/He ratios during the onset phase of the 197t January 25 flare event indicate a substantial (2() O times) enhancement of the ratios above the solar photospheric abundances. It is suggested that preferential acceleration of the heavy elements within the solar-flare region is the most likely cause of the increased abundances.