Corpus ID: 115135625

Positrons in the Galaxy: their births, marriages and deaths

  title={Positrons in the Galaxy: their births, marriages and deaths},
  author={Gerald K. Skinner},
  journal={arXiv: Astrophysics of Galaxies},
  • G. Skinner
  • Published 24 May 2010
  • Physics
  • arXiv: Astrophysics of Galaxies
High energy (approximately GeV) positrons are seen within cosmic rays and observation of a narrow line at 511 keV shows that positrons are annihilating in the galaxy after slowing down to approximately keV energies or less. Our state of knowledge of the origin of these positrons, of the formation of positronium 'atoms', and of the circumstances of their annihilation or escape from the galaxy are reviewed and the question of whether the two phenomena are linked is discussed. 

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