  Solar neutrino detection is known to be a very challenging task, due to the
minuscule absorption cross-section and mass of the neutrino. One research
showed that relative large solar-flares affected the decay-rates of Mn-54 in
December 2006. Since most the radiation emitted during a solar flare are
blocked before reaching the earth surface, it should be assumed that such
decay-rate changes could be due to neutrino flux increase from the sun, in
which only neutrinos can penetrate the radionuclide. This study employs the
Rn-222 radioactive source for the task of solar flare detection, based on the
prediction that it will provide a stable gamma ray counting rate. In order to
ascertain counting stability, three counting systems were constructed to track
the count-rate changes. The Rn-222 count-rate measurements showed several
radiation counting dips, indicating that the radioactive nuclide can be
affected by order of magnitude neutrino flux change from the sun. We conclude
that using the cooled Radon source obtained the clearest responses, and
therefore this is the preferable system for detecting neutrino emissions from a
controlled source.
