Preparation of Gd Loaded Liquid Scintillator for Daya Bay Neutrino Experiment

Journal Article · Wed May 12 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3442611· OSTI ID:21362031

Yayun, Ding; Zhiyong, Zhang ^[1]

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1. Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100049 (China)

Gadolinium loaded liquid scintillator (Gd-LS) is an excellent target material for reactor antineutrino experiments. Ideal Gd-LS should have long attenuation length, high light yield, long term stability, low toxicity, and should be compatible with the material used to build the detector. We have developed a new Gd-LS recipe in which carboxylic acid 3,5,5-trimethylhexanoic acid is used as the complexing ligand to gadolinium, 2,5-diphenyloxazole (PPO) and 1,4-bis[2-methylstyryl]benzene (bis-MSB) are used as primary fluor and wavelength shifter, respectively. The scintillator base is linear alkyl benzene (LAB). Eight hundred liters of Gd-LS has been synthesized and tested in a prototype detector. Results show that the Gd-LS has high quality and is suitable for underground experiments in large quantity. Large scale production facility has been built. A full batch production of 4 t Gd-LS has been produced and monitored for several months. The production of 180 t Gd-LS will be carried out in the near future.

• OSTI ID: 21362031
• Journal Information: AIP Conference Proceedings, Vol. 1235, Issue 1; Conference: 7. Japan-China joint nuclear physics symposium, Tsukuba (Japan), 9-13 Nov 2009; Other Information: DOI: 10.1063/1.3442611; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTINEUTRINOS
BENZENE
CARBOXYLIC ACIDS
GADOLINIUM
PHOSPHORS
TOXICITY
UNDERGROUND FACILITIES
WAVELENGTHS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
AROMATICS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HYDROCARBONS
LEPTONS
MASSLESS PARTICLES
MATTER
METALS
NEUTRINOS
ORGANIC ACIDS
ORGANIC COMPOUNDS
RARE EARTHS