Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Re-evaluation of the $^{16}$O($n$,$\gamma$)$^{17}$O cross section at
  astrophysical energies and its role as neutron poison in the $s$ process   The doubly-magic nucleus $^{16}$O has a small neutron capture cross section
of just a few tens of microbarn in the astrophysical energy region. Despite of
this, $^{16}$O plays an important role as neutron poison in the astrophysical
slow neutron capture ($s$) process due to its high abundance. We present in
this paper a re-evaluation of the available experimental data for
$^{16}$O($n,\gamma$)$^{17}$O and derive a new recommendation for the
Maxwellian-averaged cross sections (MACS) between $kT$= 5$-$100 keV. Our new
recommendations are lower up to $kT$= 60 keV compared to the previously
recommended values but up to 14\% higher at $kT$= 100 keV. We explore the
impact of this different energy dependence on the weak $s$-process during core
helium- ($kT$= 26 keV) and shell carbon burning ($kT$= 90 keV) in massive stars
where $^{16}$O is the most abundant isotope.

24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg