Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Double beta decay experiments: past and present achievements   A brief history of double beta decay experiments is presented. The best
currently running experiments (NEMO-3 and CUORICINO) and their latest results
are described. The best measurements and limits for the $2\nu\beta\beta$,
$0\nu\beta\beta$ and $0\nu\chi^{0}\beta\beta$ are summarized.

34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org