Composition of cosmic-ray nuclei from boron to nickel for 1200 to 2400 MeV per nucleon

Abstract

view Abstract Citations (17) References (47) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Composition of cosmic-ray nuclei from boron to nickel for 1200 to 2400 MeV per nucleon Dwyer, R. ; Meyer, P. Abstract Balloon-borne measurements of cosmic-ray nuclear abundances for Z = 5-28 and energies 1.2-1.4 GeV/nucleon, obtained using the scintillation/Cerenkov-counter telescope and multiwire proportional counter described by Dwyer et al. (1984) on four flights from Texas and Oklahoma during 1973-1975, are reported. The data are presented in tables and graphs and compared with published observations. Charge separation (sigma = 0.2 units for Fe) and exposure factor (38 sq m sr h) are attained, and the findings are found to be in good agreement with the predictions of a simple leaky-box model of the Galaxy and a pure exponential path-length distribution, although a nested-leaky-box model with some truncation is possible. The delay between e-process nucleosynthesis and cosmic-ray acceleration is estimated on the basis of the Co abundance at greater than 100 d and probably greater than 100,000 yr. Publication: The Astrophysical Journal Pub Date: July 1985 DOI: 10.1086/163310 Bibcode: 1985ApJ...294..441D Keywords: Abundance; Cosmic Ray Showers; Galactic Cosmic Rays; Heavy Nuclei; Particle Acceleration; Particle Telescopes; Balloon-Borne Instruments; Cerenkov Counters; Energetic Particles; Energy Spectra; High Energy Interactions; Interstellar Chemistry; Nuclear Fusion; Proportional Counters; Scintillation Counters; Astrophysics full text sources ADS |