Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precision measurement of the $^3D_1$ and $^3D_2$ quadrupole moments in
  Lu$^+$   Precision measurements of the Lu$^+$ $^3D_1$ and $^3D_2$ quadrupole moments
have been carried out giving $\Theta(^3D_1)=0.63862(74)\,e a_0^2$ and
$\Theta(^3D_2)=0.8602(14)\,e a_0^2$, respectively. The measurements utilize the
differential shift between ions in a multi-ion crystal so that effects of
external field gradients do not contribute leaving only the well defined
Coulomb interaction. At this level of precision, hyperfine-mediated corrections
will likely be important.

1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys