Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nuclear Data for Astrophysical Modeling   Nuclear physics has been playing an important role in modern astrophysics and
cosmology. Since the early 1950's it has been successfully applied for the
interpretation and prediction of astrophysical phenomena. Nuclear physics
models helped to explain the observed elemental and isotopic abundances and
star evolution and provided valuable insights on the Big Bang theory. Today,
the variety of elements observed in stellar surfaces, solar system and cosmic
rays, and isotope abundances are calculated and compared with the observed
values. Consequently, the overall success of the modeling critically depends on
the quality of underlying nuclear data that helps to bring physics of macro and
micro scales together. To broaden the scope of traditional nuclear astrophysics
activities and produce additional complementary information, I will investigate
applicability of the U.S. Nuclear Data Program (USNDP) databases for
astrophysical applications. EXFOR (Experimental Nuclear Reaction Data) and ENDF
(Evaluated Nuclear Data File) libraries have large astrophysics potential; the
former library contains experimental data sets while the latter library
includes evaluated neutron cross sections. ENSDF (Evaluated Nuclear Structure
Data File) database is a primary depository of nuclear structure and decay
rates information. The decay rates are essential in stellar nucleosynthesis
calculations, and these rates are evaluated using nuclear structure codes. The
structure evaluation codes are pure mathematical procedures that can be applied
to diverse data samples. A brief review of astrophysical nuclear data needs has
been presented. Several opportunities and the corresponding computer tools have
been identified. Further work will include extensive analysis of nuclear
databases and computer procedures for astrophysical calculations.

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The categories of this paper are: q-fin
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an