The laboratory measurement of radioactivity purification for Pb212 in liquid scintillator

TL;DR

This paper presents a laboratory setup for measuring and optimizing the removal of radioactive Pb-212 from liquid scintillator using water extraction, aiding the design of large-scale purification processes for neutrino experiments.

Contribution

Development of a laboratory measurement system for Pb-212 radioactivity purification in liquid scintillator, facilitating optimization of water extraction techniques for high-purity requirements.

Findings

Effective measurement of Pb-212 removal efficiency.

Optimization parameters for water extraction process.

Insights for scaling up purification methods.

Abstract

The liquid scintillator (LS) has been widely utilized in the past, running and future neutrino experiments, and requirement to the LS radio-purity is higher and higher. The water extraction is a powerful method to remove soluble radioactive nuclei, and a mini-extraction station has been constructed. To evaluate the extraction efficiency and optimize the operation parameters, a setup to load radioactivity to LS and a laboratory scale setup to measure radioactivity which use Bi^{212}-Po^{212}-Pb^{208} cascade decay are developed. Experiences from laboratory study will be useful to large scale water extraction plants design and the optimization of working in future.