Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Estimations and integral measurements for the spectral yield of neutrons
  from thick beryllium target bombarded with 16 MeV protons   Spectral yield of p+Be neutrons emitted by thick (stopping) beryllium target
bombarded by 16 MeV protons was estimated via extrapolation of literature data.
The spectrum was validated via multi-foil activation method and irradiation of
2N2222 transistors. The hardness parameter (NIEL scaling factor) for
displacement damage in bulk silicon was calculated and measured and kappa =
1.26 +- 0.1 was obtained.

1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org