Altitude dependence of fluorescence light emission by extensive air showers

Details Altitude dependence of fluorescence light emission by extensive air showers Altitude dependence of fluorescence light emission by extensive air showers

2008-01-28

arxiv.org/abs/0801.4200v4

Nucl.Instrum.Meth.A597:99-104,2008

Astronomy and Astrophysics

Astrophysics

8 pages, 18 figures, to be published in Proc. 5th Fluorescence Workshop, El Escorial - Madrid, Sept. 2007

Scientific paper

10.1016/j.nima.2008.08.060

Fluorescence light is induced by extensive air showers while developing in the Earth's atmosphere. The number of emitted fluorescence photons depends on the conditions of the air and on the energy deposited by the shower particles at every stage of the development. In a previous model calculation, the pressure and temperature dependences of the fluorescence yield have been studied on the basis of kinetic gas theory, assuming temperature-independent molecular collision cross-sections. In this work we investigate the importance of temperature-dependent collision cross-sections and of water vapour quenching on the expected fluorescence yield. The calculations will be applied to simulated air showers while using actual atmospheric profiles to estimate the influence on the reconstructed energy of extensive air showers.

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