Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of $^{139}$La(p,x) Cross Sections from 35-60 MeV by
  Stacked-Target Activation   A stacked-target of natural lanthanum foils (99.9119% $^{139}$La) was
irradiated using a 60 MeV proton beam at the LBNL 88-Inch Cyclotron.
$^{139}$La(p,x) cross sections are reported between 35-60 MeV for nine
radionuclides. The primary motivation for this measurement was the need to
quantify the production of $^{134}$Ce. As a positron-emitting analogue of the
promising medical radionuclide $^{225}$Ac, $^{134}$Ce is desirable for in vivo
applications of bio-distribution assays for this emerging radio-pharmaceutical.
The results of this measurement were compared to the nuclear model codes TALYS,
EMPIRE and ALICE (using default parameters), which showed significant deviation
from the measured values.

23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess