Precise measurement of the absolute fluorescence yield of the 337 nm band in atmospheric gases

0420836 - FZÚ 2014 RIV NL eng J - Článek v odborném periodiku
Ave, M. - Boháčová, Martina - Curry, E. - Di Carlo, P. - Di Giulio, C. - Facal San Luis, P. - Gonzales, D. - Hojvat, C. - Hörandel, J. - Hrabovský, M. - Iarlori, M. - Keilhauer, B. - Klages, H. - Kleifges, M. - Kuehn, F. - Li, S. - Monasor, M. - Nožka, Libor - Palatka, Miroslav - Petrera, S. - Privitera, P. - Řídký, Jan - Rizi, V. - Rouille D’Orfeuil, B. - Salamida, F. - Schovánek, Petr - Smida, R. - Spinka, H. - Ulrich, A. - Verzi, V. - Williams, C.
Precise measurement of the absolute fluorescence yield of the 337 nm band in atmospheric gases.
Astroparticle Physics. Roč. 42, Feb (2013), 90-102. ISSN 0927-6505. E-ISSN 1873-2852
Grant CEP: GA MŠMT(CZ) LA08016
Institucionální podpora: RVO:68378271
Klíčová slova: nitrogen fluorescence yield * air fluorescence detection * ultra-high energy cosmic rays
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 4.450, rok: 2013

A measurement of the absolute fluorescence yield of the 337 nm nitrogen band, relevant to ultra-high energy cosmic ray (UHECR) detectors, is reported. Two independent calibrations of the fluorescence emission induced by a 120 GeV proton beam were employed: Cherenkov light from the beam particle and calibrated light from a nitrogen laser. The fluorescence yield in air at a pressure of 1013 hPa and temperature of 293 K was found to be Y-337 = 5.61 +/- 0.06(stat) +/- 0.22(syst) photons/MeV. When compared to the fluorescence yield currently used by UHECR experiments, this measurement improves the uncertainty by a factor of three, and has a significant impact on the determination of the energy scale of the cosmic ray spectrum.
Trvalý link: http://hdl.handle.net/11104/0227319