Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The laboratory measurement of radioactivity purification for Pb212 in
  liquid scintillator   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.

24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg