High-energy proton,helium, and gamma-ray observations on OSO-III |
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| Authors: | M F Kaplon D Valentine |
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| Institution: | (1) Dept. of Physics and Astronomy, University of Rochester, Rochester, N.Y., U.S.A. |
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| Abstract: | A report on preliminary results obtained from the analysis of the first 700 orbits of data obtained in the University of Rochester particle telescope, carried in the wheel section of OSO-III, is presented. The telescope is sensitive to high-energy  -rays (threshold 50 MeV) and the nuclear component of the cosmic radiation. An upper limit of 3.2 × 10–4 /cm2secster. is set on the intensity of the diffuse primary -radiation, on the assumption it arises from the decay of  ° mesons produced in nuclear interactions. An upper limit to the flux from the sun, on the same assumptions, is set at 5.5 × 10–5 /cm2 sec. The analysis of the charged particle data yields the integral rigidity spectra of proton and helium nuclei from 3 to 15 GV; the results indicate that the He spectrum is slightly steeper than the proton spectrum and that the ratio P/He increases slowly from a value of approximately 6 at 3 GV to 8 at 15 GV.NASA Predoctoral Trainee. |
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