Novel Technique for Ultra-sensitive Determination of Trace Elements in Organic Scintillators

Details Novel Technique for Ultra-sensitive Determination of Trace Elements in Organic Scintillators Novel Technique for Ultra-sensitive Determination of Trace Elements in Organic Scintillators

2002-10-16

arxiv.org/abs/hep-ex/0210038v3

Nucl.Instrum.Meth. A507 (2003) 680-690

Physics

High Energy Physics

High Energy Physics - Experiment

16 pages, 3 figures, accepted for publication in Nuclear Instruments and Methods A

Scientific paper

10.1016/S0168-9002(03)01362-7

A technique based on neutron activation has been developed for an extremely high sensitivity analysis of trace elements in organic materials. Organic materials are sealed in plastic or high purity quartz and irradiated at the HFIR and MITR. The most volatile materials such as liquid scintillator (LS) are first preconcentrated by clean vacuum evaporation. Activities of interest are separated from side activities by acid digestion and ion exchange. The technique has been applied to study the liquid scintillator used in the KamLAND neutrino experiment. Detection limits of <2.4X10**-15 g 40K/g LS, <5.5X10**-15 g Th/g LS, and <8X10**-15 g U/g LS have been achieved.

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