Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Piezonuclear Neutrons   We report the results of neutron measurements carried out during the
application of ultrasounds to a solution containing only stable elements like
Iron and Chlorine, without any other radioactive source of any kind. These
measurements, carried out by CR39 detectors and a Boron TriFouride electronic
detector, evidenced the emission of neutron pulses. These pulses stand well
above the electronic noise and the background of the laboratory where the
measurements were carried out.

15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys