Heidelberg 2007 – scientific programme

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T: Fachverband Teilchenphysik

T 508: Dunkle Materie und niederenergetische Neutrinos

T 508.6: Talk

Friday, March 9, 2007, 15:15–15:30, KIP SR 2.403

Simulation of the Neutron Induced Background in Direct Dark Matter Searches — •Stephan Scholl, Michael Bauer, Josef Jochum, and Klemens Rottler — Physikalisches Institut I, Eberhard-Kalrs-Universität Tübingen

In direct dark matter searches, a small signal due to the scattering of WIMPs of nuclei in the detector has to be detected against a large background induced by ambient radioactivity and myons. While the dicrimination of the electromagnetic background can be easily done by the simultaneous read-out of two signal channels in eperiments like CRESST or EDELWEISS, the remaining background is given by nuclear recoils from neutron induced reactions. For the analysis of such experiments, this irreducible background ha to be understood.

Simulations of both elastic and inelastic neutron scattering were done in GEANT4, where several issues show up for the simulation of inelastic neutron scattering. These problems are addressed and available corrections presented.