Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electronic bridge excitation in highly charged Th-229 ions   The excitation of the 8 eV $^{229m}$Th isomer through the electronic bridge
mechanism in highly charged ions is investigated theoretically. By exploiting
the rich level scheme of open $4f$ orbitals and the robustness of highly
charged ions against photoionization, a pulsed high-intensity optical laser can
be used to efficiently drive the nuclear transition by coupling it to the
electronic shell. We show how to implement a promising electronic bridge scheme
in an electron beam ion trap starting from a metastable electronic state. This
setup would avoid the need for a tunable vacuum ultraviolet laser. Based on our
theoretical predictions, determining the isomer energy with an uncertainty of
$10^{-5}$ eV could be achieved in one day of measurement time using realistic
laser parameters.

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The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
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The categories of this paper are: econ
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con