Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for solar axions using Li-7   We describe a novel approach to the search for solar, near-monochromatic
hadronic axions, the latter being suggested to be created in the solar core
during M1 transitions between the first excited level of Li-7, at 478 keV, and
the ground state. As a result of Doppler broadening, in principle these axions
can be detected via resonant absorption by the same nuclide on the Earth.
Excited nuclei of Li-7 are produced in the solar interior by Be-7 electron
capture and thus the axions are accompanied by emission of Be-7 solar neutrinos
of energy 384 keV. An experiment was made which has yielded an upper limit on
hadronic axion mass of 32 keV at the 95% confidence level.

14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat