Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Uncertainty of the astrophysical $^{17,18}$O($\alpha$,n)$^{20,21}$Ne
  reaction rates and the applicability of the statistical model for nuclei with
  $A \lesssim 20$   Background: The ($\alpha$,n) and ($\alpha$,$\gamma$) reactions on $^{17,18}$O
have significant impact on the neutron balance in the astrophysical
$s$-process. In this scenario stellar reaction rates are required for
relatively low temperatures below $T_9 \lesssim 1$.
  Purpose: The uncertainties of the $^{17,18}$O($\alpha$,n)$^{20,21}$Ne
reactions are investigated. Statistical model calculations are performed to
study the applicability of this model for relatively light nuclei in extension
to a recent review for the $20 \le A \le 50$ mass range.
  Method: The available experimental data for the
$^{17,18}$O($\alpha$,n)$^{20,21}$Ne reactions are compared to statistical model
calculations. Additionally, the reverse $^{20}$Ne(n,$\alpha$)$^{17}$O reaction
is investigated, and similar studies for the $^{17}$F mirror nucleus are
provided.
  Results: It is found that on average the available experimental data for
$^{17}$O and $^{18}$O are well described within the statistical model,
resulting in reliable reaction rates above $T_9 \gtrsim 1.5$ from these
calculations. However, significant experimental uncertainties are identified
for the $^{17}$O($\alpha$,n$_0$)$^{20}$Ne(g.s.) channel.
  Conclusions: The statistical model is able to predict astrophysical reaction
rates for temperatures above 1 GK with uncertainties of less than a factor of
two for the nuclei under study. An experimental discrepancy for the
$^{17}$O($\alpha$,n)$^{20}$Ne reaction needs to be resolved.

34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an