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arXiv · 1304.4536

Measuring Fast Neutrons with Large Liquid Scintillation Detector for Ultra-low Background Experiments

C. Zhang·D. -M. Mei·P. Davis·B. Woltman·F. Gray
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Abstract

We developed a 12-liter volume neutron detector filled with the liquid scintillator EJ301 that measures neutrons in an underground laboratory where dark matter and neutrino experiments are located. The detector target is a cylindrical volume coated on the inside with reflective paint (95% reflectivity) that significantly increases the detector's light collection. We demonstrate several calibration techniques using point sources and cosmic-ray muons for energies up to 20 MeV for this large liquid scintillation detector. Neutron-gamma separation using pulse shape discrimination with a few MeV neutrons to hundreds of MeV neutrons is shown for the first time using a large liquid scintillator.

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C. Zhang, D. -M. Mei, P. Davis, B. Woltman, F. Gray. 2013-04-16. Measuring Fast Neutrons with Large Liquid Scintillation Detector for Ultra-low Background Experiments. https://doi.org/10.1016/j.nima.2013.07.012

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