Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge-changing transitions and capture strengths of pf-shell nuclei
  with $T_{z} = -2$ at proton drip-line   Charge-changing transitions, commonly referred to as Gamow-Teller (GT)
transitions, and electron capture/$\beta^{+}$-decay strengths for pf-shell
nuclei with $T_{z} = - 2$ at proton drip-line have been calculated using the
proton-neutron quasi-particle random phase approximation (pn-QRPA) model. The
total GT$_{+}$ strength values and electron capture/$\beta^{+}$-decay rates are
needed for the study of the late stages of the stellar evolution. The pn-QRPA
theory is used for a microscopic calculation of GT strength distribution
functions and associated stellar electron capture/$\beta^{+}$-decay rates of
proton-rich pf-shell nuclei with $T_{z} = - 2$ in the mass range 46 $\leq$ A
$\leq$ 56 at proton drip-line. Standard quenching factor of 0.74, usually
implemented in the shell model calculation, has been incorporated for the
comparison with experimental data (wherever available). The calculated GT
strength of the two proton-rich nuclei, $^{52}$Ni and $^{56}$Zn are compared
with experimental data of corresponding mirror nuclei. It has been found that
the pn-QRPA results are in good agreement with the experimental data as well as
shell model result. It is noted that the total GT strength increases linearly
with the increase of mass number. The electron capture/$\beta^{+}$-decay rates
for proton-rich nuclei are calculated on a temperature and density scale
relevant to presupernova evolution of massive stars. The $\beta^{+}$ decay
half-lives are compared with measured and other theoretical calculations.

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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
2
The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: math-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: eess