Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-equilibrium thermionic electron emission for metals at high
  temperatures   The stationary thermionic electron emission currents from heated metals are
compared against an analytical expression derived using a non equilibrium
quantum Kappa energy distribution for the electrons. This later depends on the
temperature decreasing parameter $\kappa(T)$ which can be estimated from the
raw experimental data and characterizes the departure of the electron energy
spectrum from the equilibrium Fermi-Dirac statistics. The calculations
accurately predict the measured thermionic emission currents for both high and
moderate temperature ranges. The Richardson-Dushman law governs the electron
emission for large values of Kappa or equivalently, for moderate metal
temperatures. The high energy tail in the electron energy distribution function
which develops at higher temperatures or lower Kappa parameters, increases the
emission currents well over the predictions of the classical expression. This
analysis also permits the quantitative estimation of the departure of the metal
electrons from the equilibrium Fermi-Dirac statistics.

35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th