Journal
ASTROPARTICLE PHYSICS
Volume 25, Issue 2, Pages 129-139Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.astropartphys.2005.12.008
Keywords
nitrogen fluorescence; air fluorescence; extensive air shower; ultrahigh-energy cosmic rays
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In a test experiment at the Final Focus Test Beam of the Stanford Linear Accelerator Center, the fluorescence yield of 28.5 GeV electrons in air and nitrogen was measured. The measured photon yields between 300 and 400 nm at 1 atm and 29 degrees C are Y(760 Torr)(air) = 4.42 +/- 0.73 and Y(760 Torr)N-2 = 29.2 +/- 4.8 photons per electron per meter. Assuming that the fluorescence yield is proportional to the energy deposition of a charged particle traveling through air, good agreement with measurements at lower particle energies is observed. Published by Elsevier B.V.
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