Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solar Flares: Gamma Rays   We briefly review the theory of gamma ray production in solar flares and
present the highlights of the observations and their implications.
Specifically: (i) the gamma ray data show that a large fraction of the released
flare energy is in accelerated ions, mostly around 1 MeV/nucleon; (ii) the
accelerated He-3, heavy ion, and relativistic electron abundances are enriched,
implying that the particle acceleration is dominated by stochastic gyroresonant
interactions with plasma turbulence; (iii) there is evidence for the
enhancement of the abundances of ambient chromospheric elements with low first
ionization potentials; (iv) the observed Li-7 and Be-7 lines, at 0.429 MeV and
0.478 MeV due to alpha-alpha interactions, show that both the accelerated alpha
particle and the ambient He abundances are significantly enhanced.

37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg