NASA Technical Reports Server (NTRS) : A pdf

NASA Technical Reports Server (NTRS) : A

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The differential energy spectra of cosmic-ray positrons and negatrons with energies between approximately 11 and 1500 MeV was measured during the period 1968-1971 using a balloon-borne magnetic spectrometer. These measurements fill a gap in the previously existing data and permit the determination of the interstellar spectra of cosmic-ray positrons and electrons. Knowledge of these spectra provides a crucial tool for studies of the distribution and density of matter and magnetic fields in the interstellar medium and the origin and dynamics of energetic particles contained in the fields. The differential energy spectrum of interstellar electrons may be represented as a power-law, j alpha T to the -1.8 power for 100 MeV approximately T approximately 2 GeV, but must flatten considerably at lower energies. From the measured electron charge composition, it is concluded that the majority of cosmic-ray electrons with energies above approximately 10 MeV originate in primary sources

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 3/1/1973
• Year: 1973
• Book Topics/Themes: NASA Technical Reports Server (NTRS), COSMIC RAYS, ELECTRONS, ENERGY SPECTRA, INTERSTELLAR SPACE, POSITRONS, BOLTZMANN TRANSPORT EQUATION, DIFFUSION COEFFICIENT, SOLAR SPECTROMETERS, Cummings, A. C

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