Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inverse $\beta^+$ - decay of proton in strong magnetic field   In the present work, the energy spectrum and solution of Dirac's equation for
the charged and neutral fermions taking into account interaction of the
anomalous magnetic moments of particles with the external field are obtained.
The total probability of the inverse beta- decay of proton in the presence of
strong uniform magnetic field taking into account the anomalous magnetic
moments of nucleons is found.

14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex