Photon and Helium Energy Spectra above 1 TeV for Primary Cosmic Rays
- 12 September 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 51 (11) , 1010-1013
- https://doi.org/10.1103/physrevlett.51.1010
Abstract
Energy spectra of protons and helium nuclei in the primary cosmic rays were measured above 1 TeV in a series of balloon flights of emulsion chambers. Differential spectra may be represented by power laws of indices -2.81±0.13 and -2.83±0.20 for protons and He, respectively. No index change was observed for either species over the energy ranges 5-500 TeV for protons and 2-50 TeV/nucleon for He. Intensities were consistent with extrapolations of previously published data below 1 TeV/nucleon.Keywords
This publication has 13 references indexed in Scilit:
- Validity of Scaling toeV and High-Energy Cosmic-Ray CompositionPhysical Review Letters, 1981
- Three-dimensional development of cascade showers induced by 50-, 100-, and 300-GeV electronsPhysical Review D, 1980
- Development of Atmospheric Cosmic-Ray ShowersPhysical Review Letters, 1979
- Composition of Primary Cosmic Rays aboveeV from the Study of Time Distributions of Energetic Hadrons near Air-Shower CoresPhysical Review Letters, 1979
- On the high energy proton spectrum measurementsAstrophysics and Space Science, 1977
- Origin of energetic cosmic rays. II. The possibility of a contribution from pulsarsJournal of Physics A: Mathematical, Nuclear and General, 1974
- Cosmic Ray Sources: Evidence for Two Acceleration MechanismsScience, 1973
- Cosmic-Ray Proton and Helium Spectra above 50 GeVPhysical Review Letters, 1972
- Measurement of the Primary Cosmic-Ray Proton Spectrum between 40 and 400 GeVPhysical Review B, 1969
- Calculation of Cascade Functions for the Emulsion Chamber ProjectProgress of Theoretical Physics Supplement, 1964