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Göttingen 2012 – scientific programme

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T: Fachverband Teilchenphysik

T 110: Niederenergie-Neutrinophysik/Suche nach Dunkler Materie 5

T 110.5: Talk

Wednesday, February 29, 2012, 17:50–18:05, ZHG 102

Proton Recoils in Organic Liquid Scintillator — •Jürgen Winter — for the LENA working group - Technische Universität München, Physik Department E15, James Franck Straße, 85748 Garching

In liquid-scintillator detectors like the LENA (Low Energy Neutrino Astronomy) project, understanding the nature of proton recoils is vital. First of all concerning the observation of the diffuse Supernova νe background with the inverse beta decay (IBD). This signature can be mimicked by the thermalization and capture of a knockout neutron originating from inelastic NC interactions of atmospheric neutrinos on 12C. However, with the help of pulse shape discrimination between the neutron-induced proton recoils and the prompt positron signal from the IBD, this background might be reduced effectively. Furthermore, elastic ν-p scattering is an important channel for neutrinos from a galactic core-collapse SN. In order to reconstruct the initial neutrino energy, the energy-dependent quenching factor of proton recoils has to be known. Therefore, a neutron scattering experiment at the Maier-Leibnitz-Laboratorium in Garching has been set up in order to understand the response of proton recoils in organic liquid scintillator.

This work has been supported by the Maier-Leibnitz-Laboratorium and the cluster of excellence ’Origin and Structure of the Universe’.

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