Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of Krypton-85 in samples of atmospheric with Quantulus 1220
  device without using a liquid scintillator   The possibility of measuring the 85Kr activity with a liquid scintillation
spectrometer (LSS) by registering the scintillations in krypton was
investigated. It was found that at partial pressure of krypton less than
atmospheric, the conversion efficiency of krypton scintillators amounts to 3
keV/photon and is 20 times lower than the conversion efficiency of liquid
scintillators. The amplitude of the pulses due to scintillations in krypton is
approximately equal to the amplitude of the pulses from Cherenkov radiation
which occurs in the walls of the vial under the influence of 85Kr beta
particles.

19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org