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HK: Hadronen und Kerne

HK 29: Weak Interactions and Fundamental Symmetries II

HK 29.5: Talk

Tuesday, March 17, 1998, 15:30–15:45, E

Background free neutrino spectroscopy with Karmen — •C. Ruf — Institut für Strahlen und Kernphysik der Universität Bonn

In the Karmen neutrino experiment performed at the Rutherford Appleton Laboratory neutrinos with energies up to 52.8 MeV are detected in a 56 t scintillation calorimeter. The physical aims of the Karmen experiment are the search for neutrino oscillations in the appearance channels ν_µ → ν_e and ν_µ → ν_e as well as the detailed study of neutrino nucleus interactions on ¹²C, ¹³C and ⁵⁶Fe.

In an upgrade programme to improve the sensitivity for ν–oscillations an additional veto counter system has been installed. This allows an almost complete suppression of any cosmogenic background. >From the new data an background free analysis of neutrino nucleus interactions are presented.

We acknowledge the financial support of the BMBF.