Atmospheric gamma-ray observation with the BETS detectorfor calibrating atmospheric neutrino flux calculations

Abstract

We observed atmospheric gamma-rays around 10 GeV at balloon altitudes (15~25 km) and at a mountain (2770 m a.s.l). The observed results were compared with Monte Carlo calculations to find that an interaction model (Lund Fritiof1.6) used in an old neutrino flux calculation was not good enough for describing the observed values. In stead, we found that two other nuclear interaction models, Lund Fritiof7.02 and dpmjet3.03, gave much better agreement with the observations. Our data will serve for examining nuclear interaction models and for deriving a reliable absolute atmospheric neutrino flux in the GeV region.

9 pages 12 figures

References in corpus (7)

• Measurements of the Solar Neutrino Flux from Super-Kamiokande's First 300 Days
• Atmospheric neutrino flux above 1 GeV
• Precise Measurement of Cosmic-Ray Proton and Helium Spectra with the BESS Spectrometer
• Calculation of the Flux of Atmospheric Neutrinos
• The Energy Spectra and Relative Abundances of Electrons and Positrons in the Galactic Cosmic Radiation
• A 3-Dimensional Calculation of Atmospheric Neutrino Flux
• Measurements of atmospheric muon spectra at mountain altitude

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• Gamma-Rays Produced in Cosmic-Ray Interactions and the TeV-band Spectrum of RX J1713-3946
• Production of Neutrinos and Secondary Electrons in Cosmic Sources
• Cosmic-ray spectra of primary protons and high altitude muons deconvolved from observed atmospheric gamma rays