Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $^7$Be and $^{22}$Na radionuclides for a new therapy of cancer   The $^{10}$B isotope has been almost exclusively used in the neutron-capture
radiation therapy (NCT) of cancer for decades. We have identified two other
nuclides suitable for the radiotherapy, which have ca.10 times larger cross
section of absorption for neutrons and emit heavy charged particles. This would
provide several key advantages for potential NCT, such as the possibility to
use either a lower nuclide concentration in the target tissues, or a lower
neutron irradiation flux. By detecting the characteristic $\gamma$ radiation
from the spontaneous decay of the radionuclides, one can image and control
their accumulation. These advantages could be critical for the revival of the
NCT as a safer, more efficient and more widely used cancer therapy.

16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int