Primary Proton and Helium Spectra Observed by RUN- JOB Collaboration

From 1995 through 1999, RUssian Nippon JOint Balloon collaboration (RUNJOB) had 10 successful balloon flights to observe primary cosmic rays by emulsion chambers. We have reported the half of the total exposure, 575 m hour and in this paper we will report the spectra of protons and alpha particles, using all the data with sum of gamma ray energies greater than 5 TeV, though some chambers are scanned for the lower energy events. And we have got the spectra up to 10 eV/nucleon. We also report the technical details for the energy determination method newly employed, basing on the lateral spread of cascade showers. pp. 1837–1840 c ©2003 by Universal Academy Press, Inc.