SOLAR INFLUENCES ON COSMIC RAYS

Solar Influences on Cosmic Rays and Cloud Formation: A Reassessment

[1] Svensmark and Friis-Christensen [1997] proposed a ‘‘cosmic ray-cloud cover’’ hypothesis that cosmic ray flux, modulated by solar activity, may modify global cloud cover and thus global surface temperature by increasing the number of ions in the atmosphere, leading to enhanced condensation of water vapor and cloud droplet formation. We evaluate this idea by extending their period of study an...

Solar Influence on Climate: Cosmic Rays

On Solar System and Cosmic Rays Nucleosynthesis and Spallation Processes

A brief survey of nuclide abundances in the solar-system and in cosmic rays and of the believed mechanisms of their synthesis is given. The role of spallation processes in nucleosynthesis is discussed. A short review of recent measurements, compilations, calculations, and evaluations of spallation cross sections relevant to nuclear astrophysics is given as well. It is shown that in some past as...

Solar Modulation on Galactic Cosmic Rays in the Earth’s Atmosphere

A brief review of solar modulation on galactic cosmic rays in the earth’s atmosphere is presented. The results of the characterizations of the major two events i.e. Galactic Cosmic Rays (GCRs)(measured in counts) and Galactic Solar rays(GSRs) (measured in counts) against time (measured in hour) shows significant variations. It was also observed that the variations of the events are slightly out...

24 . Cosmic rays 1 24 . COSMIC RAYS

The cosmic radiation incident at the top of the terrestrial atmosphere includes all stable charged particles and nuclei with lifetimes of order 106 years or longer. Technically, “primary” cosmic rays are those particles accelerated at astrophysical sources and “secondaries” are those particles produced in interaction of the primaries with interstellar gas. Thus electrons, protons and helium, as...