Computer Science
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978stin...8011986j&link_type=abstract
Unknown
Computer Science
Composition (Property), Nitrogen Isotopes, Primary Cosmic Rays, High Altitude Balloons, Interstellar Chemistry, Interstellar Radiation, Nuclear Emulsions, Solar System
Scientific paper
An experimental investigation of the isotopic composition of cosmic ray nitrogen and oxygen is reported. The detector was a stack of nuclear emulsions exposed at about 3 g/sq cm atmospheric depth. The mass determinations were based on photometric track width measurements on stopping nuclei. The energy of the measured nuclei falls in the interval 220 to 450 MeV/nuclean at the top of the atmosphere. The cosmic ray source shows that the nitrogen-oxygen abundances ratio is approximately the same in the source as in the solar system. The results were compared with different hypotheses about the source composition and is found to be in best agreement with a hypothesis which states that the source matter has approximately the composition of the solar system.
Jacobsson L.
Joensson G.
Kristiansson Krister
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