Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Competition of electron capture and beta-decay rates in supernova
  collapse   We calculate supernova electron capture and beta decay rates for various
pf-shell nuclei using large-scale shell model techniques. We show that the
centroid of the Gamow-Teller strength distribution has been systematically
misplaced in previous rate estimates. Our total electron capture rates are
significantly smaller than currently adopted in core collapse calculations,
while the total beta decay rates change less. Our calculation shows that for
electron-to-baryon ratios Ye=0.42-0.46 beta decay rates are larger than the
competing electron capture rates.

34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
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The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg