Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High activity of He droplets following ionization of systems inside
  those droplets   Relaxation processes following inner-valence ionization of a system can be
modified dramatically by embedding this system in a suitable environment.
Surprisingly, such an environment can be even composed of helium atoms, the
most inert species available. As demonstrated by the examples of Ne and Ca
atoms embedded in He droplets, a fast relaxation process [Interatomic Coulombic
Decay (ICD)] takes place merely due to the presence of the He surroundings. We
have computed ICD widths for both 4He_N and 3He_N droplets doped with Ne and Ca
and discuss the findings in some detail. In the case of Ne, ICD is by far the
dominating relaxation pathway. In Ca, atomic Auger decay is also possible but
ICD becomes a competitive relaxation pathway in the droplets.

11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph