radiation vs scattering

radiation

noun
  • The process of radiating waves or particles. 

  • The transfer of energy via radiation. 

  • The shooting forth of anything from a point or surface, like diverging rays of light. 

  • A rapid diversification of an ancestral species into many new forms. 

  • Radioactive energy. 

scattering

noun
  • The process whereby a beam of waves or particles is dispersed by collisions or similar interactions. 

  • The total number of votes awarded to nonmajor or unlisted candidates. 

  • A small quantity of something occurring at irregular intervals and dispersed at random points. 

How often have the words radiation and scattering occurred in a corpus of books? (source: Google Ngram Viewer )