A COMPARISON OF NONRELATIVISTIC ELECTRON-ESCAPE EFFICIENCIES FOR SOLAR-FLARES WITH AND WITHOUT CORONAL MASS EJECTIONS

We have calculated ratios of peak E > 70 keV interplanetary electron f luxes to E > 55 keV hard X-ray fluences from solar flares observed in 1981-1983 by the Venera 13 and Venera 14 spacecraft to determine the e scape efficiencies for nonrelativistic electrons. We used observations from the Solwind coronagraph to determine whether a coronal mass ejec tion (CME) accompanied each flare. We find that the escape efficiencie s of nine events associated with CMEs are similar to those of the eigh t events not associated with CMEs. This indicates that the population of nonrelativistic electrons produced by a CME-driven shock is at most comparable to the population of nonrelativistic electrons escaping fr om the associated flare. However, an extended electron injection phase is not considered, and there is at least one well-observed counterexa mple of an electron event produced in a coronal shock.