O. Deligny

Molecular Bremsstrahlung Radiation at GHz Frequencies in Air

A detection technique for ultra-high energy cosmic rays, complementary to the fluorescence technique, would be the use of the molecular Bremsstrahlung radiation emitted by low-energy ionization electrons left after the passage of the showers in the atmosphere. In this article, a detailed estimate of the spectral intensity of photons at ground level originating from this radiation is presented. The spectral intensity expected from the passage of the high-energy electrons of the cascade is also estimated. The absorption of the photons in the plasma of electrons/neutral molecules is shown to be negligible. The obtained spectral intensity is shown to be

Measurements and implications of cosmic ray anisotropies from TeV to trans-EeV energies

2times10^{-21}

Intensity of Microwave Signals Expected from Molecular Bremsstrahlung Radiation in Extensive Air Showers

W cm

The Small Contribution of Molecular Bremsstrahlung Radiation to the Air-Fluorescence Yield of Cosmic Ray Shower Particles

^{-2}

Measurement of Anisotropy and Search for UHECR Sources

GHz

The Energy Spectrum of Cosmic Rays at the Highest Energies

^{-1}

Arrival Directions of Cosmic Rays at Ultra-High Energies

at 10 km from the shower core for a vertical shower induced by a proton of

Measurement of anisotropy and the search for ultra high energy cosmic ray sources

10^{17.5}

宇宙線スペクトルの「くるぶし」での混合質量組成の証拠

eV. In addition, a recent measurement of Bremsstrahlung radiation in air at gigahertz frequencies from a beam of electrons produced at 95 keV by an electron gun is also discussed and reasonably reproduced by the model.