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Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment
- Authors
- Park, J.S.; Adhikari, P.; Adhikari, G.; Oh, S.Y.; Kim, N.Y.; Kim, Y.D.; Ha, C.; Park, K.S.; Lee, H.S.; Jeon, E.J.
- Issue Date
- Apr-2017
- Publisher
- ELSEVIER
- Keywords
- Dark matter; WIMP; Low-background techniques; Background veto; Liquid scintillator; Radioactivity
- Citation
- NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.851, pp 103 - 107
- Pages
- 5
- Journal Title
- NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
- Volume
- 851
- Start Page
- 103
- End Page
- 107
- ISSN
- 0168-9002
1872-9576
- 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%.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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