Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Galactic Chemical Evolution of Radioactive Isotopes with an s-process
  Contribution   Analysis of inclusions in primitive meteorites reveals that several
short-lived radionuclides (SLRs) with half-lives $0.1-100$ Myr existed in the
early Solar System (ESS). We investigate the ESS origin of $^{107}$Pd,
$^{135}$Cs, and $^{182}$Hf, which are produced by $slow$ neutron captures (the
$s$-process) in asymptotic giant branch (AGB) stars. We modelled the galactic
abundances of these SLRs using the OMEGA+ galactic chemical evolution (GCE)
code and two sets of mass- and metallicity-dependent AGB nucleosynthesis yields
(Monash and FRUITY). Depending on the ratio of the mean life $\tau$ of the SLR
to the average length of time between the formation of AGB progenitor $\gamma$,
we calculate timescales relevant for the birth of the Sun. If
$\tau/\gamma\gtrsim2$, we predict self-consistent isolation times between 9 and
26 Myr by decaying the GCE predicted $^{107}$Pd/$^{108}$Pd,
$^{135}$Cs/$^{133}$Cs, and $^{182}$Hf/$^{180}$Hf ratios to their respective ESS
ratios. The predicted $^{107}$Pd/$^{182}$Hf ratio indicates that our GCE models
are missing $9-73\%$ of $^{107}$Pd and $^{108}$Pd in the ESS. This missing
component may have come from AGB stars of higher metallicity than those that
contributed to the ESS in our GCE code. If $\tau/\gamma\lesssim0.3$, we
calculate instead the time ($T_{\rm LE}$) from the last nucleosynthesis event
that added the SLRs into the presolar matter to the formation of the oldest
solids in the ESS. For the 2 M$_\odot$, $Z=0.01$ Monash model we find a
self-consistent solution of $T_{\rm LE}=25.5$ Myr.

12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
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
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs