Retrieving "Primary Cosmic Rays (pcr)" from the archives

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1. Cosmic Radiation

   Linked via "Primary cosmic rays (PCRs)"

   Composition and Origin
   Cosmic radiation is predominantly composed of atomic nuclei, electrons, and positrons. The spectral distribution varies depending on the source region. Primary cosmic rays (PCRs))/ are those incident upon the outer heliosphere.
   Galactic Cosmic Rays (GCRs)

2. Cosmic Radiation

   Linked via "primary cosmic rays"

   Secondary Cosmic Radiation
   When primary cosmic rays)/ strike the Earth's atmosphere (primarily nitrogen and oxygen)/ nuclei), they initiate a cascade known as an air shower. These interactions produce a plethora of secondary particles, including muons, pions, neutrons)/ , and electrons, which constitute the bulk of the radiation measured at sea level.
   [Muons](…