Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exploring the mass surface near the rare-earth abundance peak via
  precision mass measurements at JYFLTRAP   The JYFLTRAP double Penning trap at the Ion Guide Isotope Separator On-Line
(IGISOL) facility has been used to measure the atomic masses of 13 neutron-rich
rare-earth isotopes. Eight of the nuclides, $^{161}$Pm, $^{163}$Sm,
$^{164,165}$Eu, $^{167}$Gd, and $^{165,167,168}$Tb, were measured for the first
time. The systematics of the mass surface has been studied via one- and
two-neutron separation energies as well as neutron pairing-gap and shell-gap
energies. The proton-neutron pairing strength has also been investigated. The
impact of the new mass values on the astrophysical rapid neutron capture
process has been studied. The calculated abundance distribution results in a
better agreement with the solar abundance pattern near the top of the
rare-earth abundance peak at around $A\approx165$.

25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc