Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental simulation of a stellar photon bath by bremsstrahlung: the
  astrophysical $\gamma$-process   The nucleosynthesis of heavy proton-rich nuclei in a stellar photon bath at
temperatures of the astrophysical $\gamma$-process was investigated where the
photon bath was simulated by the superposition of bremsstrahlung spectra with
different endpoint energies. The method was applied to derive ($\gamma$,n)
cross sections and reaction rates for several platinum isotopes.

17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
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
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph