Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single j-shell studies of cross-conjugate nuclei and isomerism   It is noted that in a calculation with 4 nucleons with isospin 1 in a single
j shell (f_{7/2}, g_{9/2}, h_{11/2}) the state with median angular momentum J =
(J_{max}+1)/2 lies very low in energy becoming either an isomeric state or a
ground state. Also states with J = J_{max} are isomeric for the orbits g_{9/2}
and h_{11/2}. Comparisons with experiment are made. A hybrid mixture of shell
model and rotational model arguments are used to explain the (J_{max} +1)/2
rule.

11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an