Primary cosmic ray spectra observed by RUNJOB --- proton and alpha spectra

Details Primary cosmic ray spectra observed by RUNJOB --- proton and alpha spectra Primary cosmic ray spectra observed by RUNJOB --- proton and alpha spectra

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icrc....3..163a&link_type=abstract

Proceedings of the 26th International Cosmic Ray Conference. August 17-25, 1999. Salt Lake City, Utah, USA. Under the auspices o

Physics

Scientific paper

Primary cosmic ray absolute fluxes of proton and helium components are reported from RUssian Nippon JOint Balloon (RUNJOB) exp eriment. RUNJOB collab oration has been carrying out the balloon campaign since 1995. Total exp osure so far b ecomes 342.4 m2 hour at the average altitude of around 30 km. Using the angular distribution of the secondary gamma rays and the darkness on X-ray films, the energy of the primary particle is estimated and the flux of proton comp onents extends up to 1014 eV including an event with the primary energy of about 1 PeV. For helium, the flux up to 1014 eV/nucleon is obtained. The procedures of analysis and results of RUNJOB exp eriments are given here from campaigns in 1995 and 1996. This paper becomes a complete paper with next OG 1.2.15. Some explanations are found in next paper and vice versa.

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