Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mitigation of Backgrounds from Cosmogenic $^{137}$Xe in Xenon Gas
  Experiments using $^{3}$He Neutron Capture   \Xe{136} is used as the target medium for many experiments searching for
\bbnonu. Despite underground operation, cosmic muons that reach the laboratory
can produce spallation neutrons causing activation of detector materials. A
potential background that is difficult to veto using muon tagging comes in the
form of \Xe{137} created by the capture of neutrons on \Xe{136}. This isotope
decays via beta decay with a half-life of 3.8 minutes and a \Qb\ of $\sim$4.16
MeV. This work proposes and explores the concept of adding a small percentage
of \He{3} to xenon as a means to capture thermal neutrons and reduce the number
of activations in the detector volume. When using this technique we find the
contamination from \Xe{137} activation can be reduced to negligible levels in
tonne and multi-tonne scale high pressure gas xenon neutrinoless double beta
decay experiments running at any depth in an underground laboratory.

17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci