Quiet‐Time Spectra and Abundances of Energetic Particles During the 1996 Solar Minimum

We report the energy spectra and abundances of ions with atomic number, Z, in the interval 2 " Z " 36 and energies D3¨20 MeV amu~1 for solar and interplanetary quiet periods between 1994 November and 1998 April, as measured by the large-geometry Low-Energy Matrix Telescope on the W ind spacecraft near Earth. The energy spectra show the presence of galactic and ìì anomalous ˇˇ cosmic- ray components (GCR and ACR, respectively), depending on the element. ACR components are reported for Mg and Si for the —rst time at 1 AU, and the previous observation of S and Ar is con—rmed. However, only GCR components are clearly apparent for the elements Ca, Ti, Cr, Fe, as well as for C. New limits are placed on a possible ACR contribution for other elements, including Kr. Subject headings: acceleration of particlescosmic raysinterplanetary medium ¨ ISM: abundancesshock waves