Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Valence pairing, core deformation and the development of two-neutron
  halos   We explore the evolution of the structure of the ground state of a nucleus
with two valence nucleons as the system approaches the two particle threshold.
We use a three-body model of $core+n+n$ where the core is deformed and allowed
to excite. We find that both NN correlations and correlations due to
deformation/excitation of the core inhibit the formation of halos. Our results
suggest that it is unlikely to find halo nuclei on the dripline of deformed
nuclei.

7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga