Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment

Abstract

We report the performance of an active veto system using a liquid scintillator with NaI(Tl) crystals for use in a dark matter search experiment. When a NaI(Tl) crystal is immersed in the prototype detector, the detector tags 48% of the internal K-40 background in the 0-10 keV energy region. We also determined the tagging efficiency for events at 6-20 keV as 26.5 +/- 1.7% of the total events, which corresponds to 0.76 +/- 0.04 events/keV/kg/day. According to a simulation, approximately 60% of the background events from U, Th, and K radioisotopes in photomultiplier tubes are tagged at energies of 0-10 keV. Full shielding with a 40-cm-thick liquid scintillator can increase the tagging efficiency for both the internal K-40 and external background to approximately 80%.

Submitted to Nuclear Instruments and Methods in Physics Research Section A

References in corpus (15)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Planck 2013 results. XVI. Cosmological parameters
• Supersymmetric Dark Matter
• A direct empirical proof of the existence of dark matter
• Final model independent result of DAMA/LIBRA-phase1
• Dark matter direct-detection experiments
• New Limits on Interactions between Weakly Interacting Massive Particles and Nucleons Obtained with CsI(Tl) Crystal Detectors
• First limit on WIMP cross section with low background CsI(Tl) crystal detector
• Tests on NaI(Tl) crystals for WIMP search at the Yangyang Underground Laboratory
• First data from DM-Ice17
• Preliminary results of ANAIS-25
• Assessment of backgrounds of the ANAIS experiment for dark matter direct detection
• A Highly Efficient Neutron Veto for Dark Matter Experiments
• Pulse-shape discrimination between electron and nuclear recoils in a NaI(Tl) crystal
• Prototyping an Active Neutron Veto for SuperCDMS

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