Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Preliminary measurement of the 2$\nu\beta\beta$ decay half-life of
  $^{150}$Nd to $^{150}$Sm   The NEMO-3 experiment searches for neutrino-less double beta
(0$\nu\beta\beta$) decay in seven different isotopes simultaneously by
reconstructing the full event topology of each decay. One of the investigated
isotopes is Nd-150, which has the second highest Q-value (3.37 MeV) of all
0$\nu\beta\beta$ candidate isotopes, as well as a favourable phase space factor
and matrix element. The largest sources of background in the search for this
rare decay process in Nd-150 are Tl-208 and the irreducible 2$\nu\beta\beta$
decay. Using the full data set from NEMO-3 detector, a complete description of
the background model is presented, along with a preliminary measurement of the
2$\nu\beta\beta$ decay rate for Nd-150 to the ground state of Sm-150.

1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int