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arXiv · 1511.05551

Development and Mass Production of a Mixture of LAB- and DIN-based Gadolinium-loaded Liquid Scintillator for the NEOS Short-baseline Neutrino Experiment

Ba Ro Kim·Boyoung Han·Eun-ju Jeon·Kyung Kwang Joo·H. J. Kim·Hyunsoo Kim·Jinyu Kim·Yeongduk Kim·Youngju Ko·Jaison Lee·Jooyoung Lee·Moohyun Lee·Kyungju Ma·Yoomin Oh·Hyangkyu Park·Kang-soon Park·Kyungmin Seo·Gwang-Min Seon·Kim Siyeon
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Abstract

A new experiment, which is called as NEOS (NEutrino Oscillation at Short baseline), is proposed on the site of Hanbit reactors at Yonggwang, South Korea, to investigate a reactor antineutrino anomaly. A homogeneous NEOS detector having a 1000-L target volume has been constructed and deployed at the tendon gallery ~25 m away from the reactor core. A linear alkylbenzene (LAB) is used as a main base solvent of the NEOS detector. Furthermore, a di-isopropylnaphthalene (DIN) is added to improve the light output and pulse shape discrimination (PSD) ability. The ratio of LAB to DIN is 90:10. PPO (3 g/L) and bis-MSB (30 mg/L) are dissolved to formulate the mixture of LAB- and DIN-based liquid scintillator (LS). Then, ~0.5% gadolinium (Gd) is loaded into the LS by using the solvent-solvent extraction technique. In this paper, we report the characteristics of Gd-loaded LS (GdLS) for the NEOS detector and the handling during mass production.

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Ba Ro Kim, Boyoung Han, Eun-ju Jeon, Kyung Kwang Joo, H. J. Kim, Hyunsoo Kim, Jinyu Kim, Yeongduk Kim, Youngju Ko, Jaison Lee, Jooyoung Lee, Moohyun Lee, Kyungju Ma, Yoomin Oh, Hyangkyu Park, Kang-soon Park, Kyungmin Seo, Gwang-Min Seon, Kim Siyeon. 2015-11-16. Development and Mass Production of a Mixture of LAB- and DIN-based Gadolinium-loaded Liquid Scintillator for the NEOS Short-baseline Neutrino Experiment. https://arxiv.org/abs/1511.05551

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