Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurements of Luminescence from Cleaved Silicon   This paper outlines the results from experiments performed to gain further
information about the structure and properties of cleaved silicon surfaces,
using vacuum cleavage luminescence detection methods. The experiments involved
detecting the luminescence produced by cleaving thin silicon plates within a
high vacuum, by a process of converting the luminescence to an amplified
electrical signal.

37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph