Absolute measurement of the nitrogen fluorescence yield in air between 300 and 430 nm

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dc.creatorLefeuvre, G.
dc.creatorGorodetzky, P.
dc.creatorDolbeau, J.
dc.creatorPatzak, T.
dc.creatorSalin, P.
dc.date2007-04-12
dc.date.accessioned2026-07-07T12:13:26Z
dc.date.available2026-07-07T12:13:26Z
dc.descriptionThe nitrogen fluorescence induced in air is used to detect ultra-high energy cosmic rays and to measure their energy. The precise knowledge of the absolute fluorescence yield is the key quantity to improve the accuracy on the cosmic ray energy. The total yield has been measured in dry air using a 90Sr source and a [300-430 nm] filter. The fluorescence yield in air is 4.23 $\pm$ 0.20 photons per meter when normalized to 760 mmHg, 15 degrees C and with an electron energy of 0.85 MeV. This result is consistent with previous experiments made at various energies, but with an accuracy improved by a factor of about 3. For the first time, the absolute continuous spectrum of nitrogen excited by 90Sr electrons has also been measured with a spectrometer. Details of this experiment are given in one of the author's PhD thesis [32].
dc.descriptionaccepted for publication in NIMA
dc.identifierhttps://arxiv.org/abs/0704.1532
dc.identifierhttp://arxiv.org/abs/0704.1532
dc.identifierNucl.Instrum.Meth.A578:78-87,2007
dc.identifierdoi:10.1016/j.nima.2007.04.106
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210847
dc.subjectAstrophysics
dc.titleAbsolute measurement of the nitrogen fluorescence yield in air between 300 and 430 nm
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