Talk:Super-Kamiokande
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From the page: Superkamiokande that i redirected to this page. (Revision as of 12:06, 21 Apr 2004)
Superkamiokande is built in the former kamioka mine in Japan. The experiment filters cosmic radiation (pions, high-energetic protons, ...), which are absorbed in the rock formations above.
Athmospheric neutrino production
The detector
The detector consists of a huge tank filled with water. The outer wall is equipped with lots of photomultipliers.
If a neutrino produced in the athmosphere crosses the tank compton scattering may occur with the electrons of water. The high energetic electron set free in this process crosses the detector with a speed higher than the speed of light within the water, producing Cherenkov radiation (Cherenkov effect). The radiation cone is observed with the photmultipliers on the wall.
Through reconstructing the eletron path (it's energy is already known from the radiation cone) one may acquire information about the path of the neutrino wich caused the electron prodution.
Interpretation The Myon-Neutrino to electron-neutrino ratio observed is incompatible with the theoretcal predictions.
Flux?
What is the observed neutrino flux, in neutrinos per day? What fraction is cosmic, atmospheric and KEK? linas 03:33, 14 Jun 2005 (UTC)