HAL : in2p3-00141070, version 1

arXiv : 0704.1532

DOI : 10.1016/j.nima.2007.04.106

Fiche détaillée

Récupérer au format BibTeX - EndNote - TEI - RefWorks -

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 578 (2007) 78-87

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

G. Lefeuvre1, P. Gorodetzky1, J. Dolbeau1, T. Patzak1, P. Salin1

(21/07/2007)

The 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 ± 0.20 photons per meter when normalized to 760 mmHg, 15°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].

1 :	APC - AstroParticule et Cosmologie

équipe(s) de recherche : APC - AHE APC - Neutrinos

Thème(s)

:

Physique/Astrophysique/Cosmologie et astrophysique extra-galactique Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique Planète et Univers/Astrophysique

Mot(s)-clé(s) : nitrogen fluorescence – air fluorescence – extensive air showers – ultra-high energy cosmic rays

in2p3-00141070, version 1

http://hal.in2p3.fr/in2p3-00141070

oai:hal.in2p3.fr:in2p3-00141070

Contributeur : Simone Lantz <>

Déposé pour le compte de : Philippe Gorodetzky <>

Soumis le : Mardi 17 Avril 2007, 15:47:55

Dernière modification le : Samedi 23 Juin 2012, 15:38:52