Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Proton ejection from molecular hydride clusters exposed to strong X-ray
  pulses   Clusters consisting of small molecules containing hydrogen do eject fast
protons when illuminated by short X-ray pulses. A suitable overall charging of
the cluster controlled by the X-ray intensity induces electron migration from
the surface to the bulk leading to efficient segregation of the protons and to
a globally hindered explosion of the heavy atoms even outside the screened
volume. We investigate this peculiar effect systematically along the
iso-electronic sequence of methane over ammonia and water to the atomic limit
of neon as a reference. In contrast to core-shell systems where the outer shell
is sacrificed to reduce radiation damage, the intricate proton dynamics of
hydride clusters allows one to keep the entire backbone of heavy atoms intact.

6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
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The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga