The Composition of Low Energy Primaries with Z>=g in Cosmic Radiation

Details The Composition of Low Energy Primaries with Z>=g in Cosmic Radiation The Composition of Low Energy Primaries with Z>=g in Cosmic Radiation

Jul 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970ap%26ss...8...74d&link_type=abstract

Astrophysics and Space Science, Volume 8, Issue 1, pp.74-85

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

Photometric mean track width measurements have been made on 81 primary particles (Z≥9) stopping in a nuclear emulsion stack exposed at 2.7 g/cm2 of residual atmosphere at Fort Churchill, Canada. The standard deviation of the charge determinations amounts to 0.14 units of charge for oxygen and increases to 0.40 units for iron nuclei when 10 mm track is measured. The relative abundances of the nuclei in the charge interval 8≤Z≤14 are given for the energy interval 250 400 MeV/nucleon, and comparisons are performed with the results of other measurements. The VH-particles are dominated by iron. The distribution of the VH-particles seems to be consistent with the assumption that the VH-nuclei have in the mean passed through only 1.6±0.5 g/cm2 interstellar matter.

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