Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Development of a Pixel Detector for Ultra-Cold Neutrons   A pixel detector with high spatial resolution and temporal information for
ultra-cold neutrons is developed based on a commercial CCD on which a neutron
converter is attached. 10B and 6Li are tested for the neutron converter and 10B
is found to be more suitable based on efficiency and spatial resolution. The
pixel detector has an efficiency of 44.1 +- 1.1% and a spatial resolution of
2.9 +- 0.1 um (1 sigma).

37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th