activity
19982013
most citedExtension of the Cosmic-Ray Energy Spectrum Beyond the Predicted Greisen-Zatsepin-Kuz'min Cutoff

674 citations · 2.3k across the 13 of their papers we have counts for

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11 papers · 1 filter

astro-ph2005

Fluorescence in damp air and comments on the radiative life time

N. Sakaki, K. Kobayakawa, M. Nagano +1

Photon yields in damp air excited by an electron using a Sr90 source are compared withthose in dry air. Water vapors considerably reduce the yields, however, a further study is…

astro-ph2004★ 127 cited

New measurement on photon yields from air and the application to the energy estimation of primary cosmic rays

M. Nagano, K. Kobayakawa, N. Sakaki +1

The air fluorescence technique is used to detect ultra-high energy cosmic rays (UHECR), and to estimate their energy. Of fundamental importance is the photon yield due to excitatio…

astro-ph2003★ 63 cited

Photon yields from nitrogen gas and dry air excited by electrons

M. Nagano, K. Kobayakawa, N. Sakaki +1

In order to detect ultrahigh-energy cosmic rays (UHECR), atmospheric fluorescence light from the trajectory of the extensive air shower may be measured by mirror-photosensor system…

astro-ph2002★ 369 cited

Energy determination in the Akeno Giant Air Shower Array experiment

M. Takeda, N. Sakaki, K. Honda +29

Using data from more than ten-years of observations with the Akeno Giant Air Shower Array (AGASA), we published a result that the energy spectrum of ultra-high energy cosmic rays e…

astro-ph2000★ 28 cited

Updated AGASA event list above 4x10^19eV

N. Hayashida, K. Honda, N. Inoue +26

After our Ap.J. publication of the Akeno Giant Air Shower Array (AGASA) results in 1999 (Takeda et al., 1999), we observed nine events with energies above 4 10eV un…

astro-ph1999★ 47 cited

Comparison of AGASA data with CORSIKA simulation

M. Nagano, D. Heck, K. Shinozaki +2

An interpretation of AGASA (Akeno Giant Air Shower Array) data by comparing the experimental results with the simulated ones by CORSIKA (COsmic Ray SImulation for KASCADE) has been…