Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Schottky mass measurements of heavy neutron-rich nuclides in the element
  range $70\leZ \le79$ at the ESR   Storage-ring mass spectrometry was applied to neutron-rich $^{197}$Au
projectile fragments. Masses of $^{181,183}$Lu, $^{185,186}$Hf, $^{187,188}$Ta,
$^{191}$W, and $^{192,193}$Re nuclei were measured for the first time. The
uncertainty of previously known masses of $^{189,190}$W and $^{195}$Os nuclei
was improved. Observed irregularities on the smooth two-neutron separation
energies for Hf and W isotopes are linked to the collectivity phenomena in the
corresponding nuclei.

24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin