Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermi and Gamow-Teller Strength in Charge Exchange with Radioactive
  Beams   At forward angles, and bombarding energies E > 200 MeV, the (p,n) and (n,p)
reactions are thought to be directly proportional to the Gamow-Teller
transition strengths in the nuclei. Assuming that this relationship also holds
for charge exchange induced by high-energy heavy ions, it would be very useful
in studies with radioactive beams. Contrary to this expectation, we show that
the determination of Gamow-Teller and Fermi matrix elements from heavy-ion
charge-exchange at forward angles is very inaccurate.

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The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: cs