Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the thickness of an insensitive surface layer of a PIN
  photodiode   We measured the thickness of an insensitive surface layer of a PIN
photodiode, Hamamatsu S3590-06, used in the Tokyo Axion Helioscope. We made
alpha-particles impinge on the PIN photodiode in various incidence angles and
measured the pulse height to estimate the thickness of the insensitive surface
layer. This measurement showed its thickness was $0.31 \pm 0.02 \mu m$ on the
assumption that the insensitive layer consisted of Si. We calculated the peak
detection efficiency for low energy x-rays in consideration of the insensitive
layer and escape of x-rays and Auger electrons. This result showed the
efficiency for 4-10keV x-rays was more than 95%.

11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
1
The categories of this paper are: cs
19
The categories of this paper are: eess