The difference in the energy spectra of galactic cosmic rays at the minima of the 19th and 20th solar activity cycles

Details The difference in the energy spectra of galactic cosmic rays at the minima of the 19th and 20th solar activity cycles The difference in the energy spectra of galactic cosmic rays at the minima of the 19th and 20th solar activity cycles

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....5...79s&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 5 p 79-82 (SEE N85-34991 23-93)

Computer Science

Cosmic Rays, Energy Spectra, Galactic Radiation, Radiant Flux Density, Solar Activity, Solar Cycles, Absorptivity, Helium, Protons, Solar Magnetic Field, Spectrum Analysis, Stratosphere

Scientific paper

The absorption curves of the cosmic ray charged component for solar minima in 1965 and 1975 to 1977 are analyzed on the basis of daily stratospheric measurements in Murmansk, Moscow, Alma-Ata and Mirny (Antarctic). Two distinct features in the energy spectra of galactic cosmic rays are revealed during these periods. At the 20th solar activity minimum there was the additional short range component of cosmic rays. Additional fluxes in the stratosphere at high latitudes caused by this component are probably protons and He nuclei with the energy 100 to 500 MeV/n. The fluxes are estimates as Approx. 300 sq m/s/sr. At the minimum in 1975 to 1977 the proton intensity in the energy range 1 to 15 GeV is 10 to 15% lower than that in the 1965 solar activity minimum.

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