Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isomeric states in neutron-rich nuclei around $N = 40$   Neutron-rich nuclei in the vicinity of the $N=40$ island of inversion are
characterized by shell evolution and exhibit deformed ground states. In several
nuclei isomeric states have been observed and attributed to excitations to the
intruder neutron $1g_{9/2}$ orbital. In the present study we searched for
isomeric states in nuclei around $N=40$, $Z=22$ produced by projectile
fragmentation at RIBF. Delayed $\gamma$ rays were detected by the EURICA
germanium detector array. High statistics data allowed for an updated decay
scheme of $^{60}$V. The lifetime of an isomeric state in $^{64}$V was measured
for the first time in the present experiment. A previously unobserved isomeric
state was discovered in $^{58}$Sc. The measured lifetime suggests a parity
changing transition, originating from an odd number of neutrons in the
$1g_{9/2}$ orbital. The nature of the isomeric state in $^{58}$Sc is thus
different from isomers in the less exotic V and Sc nuclei.

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The categories of this paper are: physics
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
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
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The categories of this paper are: stat
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The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
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The categories of this paper are: cs