Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Interaction of Neutrons With 7Be: Lack of Standard Nuclear Physics
  Solution to the "Primordial 7Li Problem"   The destruction of 7Be with neutrons represents the last possible standard
avenue to reduce the predicted abundance of the primordial 7Li and in this way
to attempt to solve the Cosmological 7Li problem. We discuss the results of an
experiment performed at the Soreq Applied Research Accelerator Facility (SARAF)
in Israel where we measured the Maxwellian Averaged Cross Sections (MACS) of
the 7Be(n,p), 7Be(n,a), and 7Be(n,ga) reactions. Our MACS measured at 49.5 keV
in the window of the Big Bang Nucleosynthesis (BBN), indicate the lack of
standard nuclear physics solution to the "Primordial 7Li Problem".

35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org