Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of inhibited electron-ion coupling in strongly heated
  graphite   Creating non-equilibrium states of matter with highly unequal electron and
lattice temperatures allows unsurpassed insight into the dynamic coupling
between electrons and ions through time-resolved energy relaxation
measurements. Recent studies on low-temperature laser-heated graphite suggest a
complex energy exchange when compared to other materials. To avoid problems
related to surface preparation, crystal quality and poor understanding of the
energy deposition and transport mechanisms, we apply a different energy
deposition mechanism, via laser-accelerated protons, to isochorically and
non-radiatively heat macroscopic graphite samples up to temperatures close to
the melting threshold. Using time-resolved x ray diffraction, we show clear
evidence of a very small electron-ion energy transfer, yielding approximately
three times longer relaxation times than previously reported. This is
indicative of the existence of an energy transfer bottleneck in non-equilibrium
warm dense matter.

26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org