Physics
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ebhe.conf..319c&link_type=abstract
ENERGY BUDGET IN THE HIGH ENERGY UNIVERSE . Proceedings of the International Workshop. Held 22-24 February 2006 in Kashiwa, Japa
Physics
Scientific paper
Ultra high energy (UHE ) neutrinos (E > 1015 eV) exist at any rate due to presence of the cosmic microwave background and UHE cosmic rays implied by Greisen, Zatsepin and Kuz'min (GZK). The low rate of GZK neutrinos requires us to utilize a large mass (> 50 Gton) of detection medium. The UHE neutrino generates a huge number of unpaired electrons in rock salt. They would emit sensible radio wave by coherent Cherenkov effect (Askar'yan effect). Attenuation lengths of natural rock salt samples including synthesized one at 0.3 and 1.0 GHz were measured to find a suitable site constructing a salt neutrino detector. The result indicates a possibility for constructing the salt neutrino detector with economical antenna spacing.
Amano Akio
Chiba Masami
Chikashige Yuichi
Fujii Masatoshi
Kamijo Toshio
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