Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints for stellar electron-capture rates on $^{86}$Kr via the
  $^{86}$Kr($t$,$^{3}$He$+\gamma$)$^{86}$Br reaction and the implications for
  core-collapse supernovae   In the late stages of stellar core-collapse, prior to core bounce, electron
captures on medium-heavy nuclei drive deleptonization and simulations require
the use of accurate reaction rates. Nuclei with neutron number near $N=50$,
just above atomic number $Z=28$, play an important role, but rates used in
astrophysical simulations rely primarily on a relatively simple single-state
approximation. In order to improve the accuracy of astrophysical simulations,
experimental data are needed to test the electron-capture rates and to guide
the development of better theoretical models. This work presents the results of
the $^{86}$Kr($t$,$^{3}$He+$\gamma$) experiment at the NSCL, from which an
upper limit for the Gamow-Teller strength up to an excitation energy in
$^{86}$Br of 5 MeV is extracted. The derived upper limit for the
electron-capture rate on $^{86}$Kr indicates that the rate estimated through
the single-state approximation is too high and that rates based on Gamow-Teller
strengths estimated in shell-model and QRPA calculations are more accurate. The
QRPA calculations tested in this manner were used for estimating the electron
capture rates for 78 isotopes near $N=50$ and above $Z=28$. The impact of using
these new electron-capture rates in simulations of supernovae instead of the
rates based on the single-state approximation is investigated, indicating a
significant reduction in the deleptonization that affects multi-messenger
signals, such as the emission of neutrinos and gravitational waves.

13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th