Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impact of a minority relativistic electron tail interacting with a
  thermal plasma containing high-atomic-number impurities   A minority relativistic electron component can arise in both laboratory and
naturally-occurring plasmas. In the presence of high-atomic-number ion species,
the ion charge state distribution at low bulk electron temperature can be
dominated by relativistic electrons, even though their density is orders of
magnitude lower. This is due to the relativistic enhancement of the collisional
excitation and ionization cross sections. The resulting charge state effect can
dramatically impact the radiative power loss rate and the related Bethe
stopping power of relativistic electrons in a dilute plasma.

34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat