Münster 2017 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 108: Neutrinophysik 9 (sterile Neutrinos)
T 108.6: Vortrag
Donnerstag, 30. März 2017, 18:10–18:25, VSH 118
Calibration studies with a 68Ge-68Ga β+ source in the SOX experiment — •Michael Nieslony for the Borexino collaboration — Johannes Gutenberg-Universität Mainz
Several experiments showed anomalous behavior in the neutrino sector which could be explained by the existence of a 4th, sterile neutrino with mass in the eV range. The existing 3 neutrino generations would then be able to oscillate into the sterile state, enabling the appearance of new oscillation phenomena at short baselines. The aim of the SOX experiment (Short distance Oscillations in BoreXino) is to test this hypothesis by placing a 144Ce-144Pr antineutrino source below the Borexino detector located deep underground in the Gran Sasso laboratories. SOX will search not only for a rate reduction in inverse beta decays induced by active antineutrinos but also for the presence of an oscillation pattern in space and energy related to the prompt positron signals.
This talk will present plans and the current status of the calibration campaign with a 68Ga-68Ge β+ source that will be essential to assess the detector response to the neutrino-induced positrons and the connected systematic uncertainties. A calibration source design and an optimized scheme of calibration points will be outlined.