Direct Electron Pairs Along Heavy Ion Tracks Derrickson, J. H. ; Eby, P. B. ; Fountain, W. F. ; Parnell, T. A. ; Watts, J. W. ; Moon, K. H. ; King, D. T. ; Gregory, J. C. ; Takahashi, Y. ; Ogata, T. Abstract Publication: 23rd International Cosmic Ray Conference (ICRC23), Volume 2 Pub Date: 1993 Bibcode: 1993ICRC....2..540D