Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analytical modeling of thin film neutron converters and its application
  to thermal neutron gas detectors   A simple model is explored mainly analytically to calculate and understand
the PHS of single and multi-layer thermal neutron detectors and to help
optimize the design in different circumstances. Several theorems are deduced
that can help guide the design.

1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg