Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Working characteristics of the New Low-Background Laboratory (DULB-4900,
  Baksan Neutrino Observatory)   A concise technical characteristic of a new low-background laboratory
DULB-4900 of the BNO INR RAS is presented. The technique and the results of
background measurements in the Hall, ordinary box and low-background box are
presented. Rn-222 contamination in the laboratory air has been measured by
direct detection of gamma-radiation of its daughter Bi-214 distributed over the
volume of the low-background box. The results of the data analysis are
presented.

1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an