Other
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jpsj...55.2070y&link_type=abstract
Physical Society of Japan, Journal (ISSN 0031-9015), vol. 55, June 1986, p. 2070-2085.
Other
Cosmic Rays, Energy Spectra, Geomagnetism, Main Sequence Stars, Nuclear Fusion, Heao 3, Heavy Nuclei, Interstellar Matter, Iron
Scientific paper
To measure the flux ratio of ultraheavy cosmic ray particles (UH) with Z greater than 45 and cosmic ray Fe nuclei at a mean geomagnetic cut-off rigidity of 10 GV, detector arrays were exposed for a net total of 45.2 m-squared days in two balloon flights in 1976 and 1982. The fluxes of particles with Z greater than 45 and Fe nuclei at the top of the atmosphere are presented. From comparison of the (UH/Fe) ratio of these experiments and that of the others at low rigidity region, it is shown that the energy spectrum of UH is somewhat different from that of Fe in the energy range 1-10 GeV/amu. Propagation calculations have been made to examine energy spectra of various cosmic ray particles. The results of the calculations show that the difference in the energy spectrum can be explained mainly by the energy-dependent nuclear fragmentation process during the propagation of cosmic ray particles.
Doke Tadayoshi
Hamasaki R.
Hayashi Tadashi
Hisano K.
Yanagimachi Tomoki
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