Measurement of the helium isotopic abundance in primary cosmic rays

Details Measurement of the helium isotopic abundance in primary cosmic rays Measurement of the helium isotopic abundance in primary cosmic rays

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978izyak..42..912i&link_type=abstract

(Vsesoiuznaia Konferentsiia po Kosmicheskim Lucham, Yakutsk, USSR, June 1977.) Akademiia Nauk SSSR, Izvestiia, Seriia Fizicheska

Physics

Abundance, Cerenkov Counters, Helium Isotopes, Primary Cosmic Rays, Scintillation Counters, Stratosphere, Balloon-Borne Instruments, High Altitude Balloons, Midlatitude Atmosphere, Particle Telescopes

Scientific paper

Results are presented for stratospheric measurements of the isotopic abundance of helium nuclei in primary cosmic rays in the energy range around 1 GeV/n, which were performed at midlatitudes with scintillation- and Cerenkov-counter telescopes aboard a high-altitude aerostat. Corrections for the effects of delta-electrons in the Cerenkov counter are discussed. A mean value of 0.15 + or - 0.04 is determined for the He-3/(He-3)+(He-4) ratio for energies of 1.13 GeV/n and higher.

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