Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the $K_L$ nuclear interaction length in the NaI(Tl)
  calorimeter   In the study of the reaction $e^+e^-\to K_{S}K_{L}$ at the VEPP-2M $e^+e^-$
collider with the SND detector the nuclear interaction length of $K_{L}$ meson
in NaI(Tl) has been measured. Its value is found to be 30--50 cm in the $K_{L}$
momentum range 0.11--0.48 GeV/$c$. The results are compared with the values
used in the simulation programs GEANT4 and UNIMOD.

1
The categories of this paper are: cs
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org