Measurement of the relative composition of the cosmic-ray iron group with lexan polycarbonate

Details Measurement of the relative composition of the cosmic-ray iron group with lexan polycarbonate Measurement of the relative composition of the cosmic-ray iron group with lexan polycarbonate

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..94..371c&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 94, no. 2, Aug. 1983, p. 371-381. Research supported by the Comision Nacio

Astronomy and Astrophysics

Astrophysics

Abundance, Cosmic Ray Showers, Heavy Nuclei, Iron Isotopes, Particle Tracks, Balloon-Borne Instruments, Inelastic Scattering, Lexan (Trademark), Nuclear Scattering, Radiation Detectors

Scientific paper

Results are presented on the relative abundances of the cosmic ray iron group at energies of 600 MeV/nucleon using lexan polycarbonate as a detector. The exposure took place at Sioux Falls, South Dakota, reaching an average altitude of 40 km, equivalent to 4 gm/sq cm of residual atmosphere, with a duration of 82 hr. The measured abundances at the detector level were extrapolated to the top of the atmosphere making use of the propagation equation in the frame of the regular model and introducing corrections to account for energy loss. The obtained relative abundances are in reasonable agreement with those reported by other authors using electronic detectors. Abnormal high abundances of magnesium and cobalt can be attributed to wide temperature variations during the registration interval. In spite of the poor mass resolution a high abundance of Fe-54 is found, indicating a nonstellar origin for cosmic iron.

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