Publication: Comparison of available measurements of the absolute air-fluorescence yield and determination of its global average value
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2011
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American Institute of Physics
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Experimental results of the absolute air-fluorescence yield are given very often in different units (photons/MeV or photons/m) and for different wavelength intervals. In this work we present a comparison of available results normalized to its value in photons/MeV for the 337 nm band at 1013 hPa and 293 K. The conversion of photons/m to photons/MeV requires an accurate determination of the energy deposited by the electrons in the field of view of the experimental set-up. We have calculated the energy deposition for each experiment by means of a detailed Monte Carlo simulation and the results have been compared with those assumed or calculated by the authors. As a result, corrections to the reported fluorescence yields are proposed. These corrections improve the compatibility between measurements in such a way that a reliable average value with uncertainty at the level of 5% is obtained.
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© 2011 American Institute of Physics.
ISSN: 0094-243X
International Symposium on the Recent Progress of Ultra-High Energy Cosmic Ray Observation (2010. Aichi, Japón)
This work has been supported by the Spanish Ministerio de Ciencia e Innovacion (FPA2009-07772 and CONSOLIDER CPAN CSD2007-42) and “Comunidad de Madrid” (Ref.: 910600). J. Rosado acknowledges a PhD grant from “Universidad Complutense de Madrid”. The authors thank our colleagues of the Auger collaboration for fruitful discussions and comments on this work.
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