The results of this experiment have been checked against predictions made by standard solar models and it has been discovered that only one-third of the expected solar neutrino flux has been detected . And it is not just the Homestake experiment that is detecting a shortage of neutrinos. Neutrinos are subatomic particles produced during nuclear fission and fusion processes. The Sun produces energy by fusing hydrogen to helium. This may be accomplished in a number of ways but in the Sun, a process known as the proton-proton chain is thought to be primarily responsible for energy generation.
Numbers indicate different isotopes.
Solutions to the solar neutrino problem are usually classified in one of two categories, astrophysical or physical. Solutions that require a change in the way we think about the Sun are termed astrophysical solutions while solutions that require a change in the way we think about neutrinos are called physical solutions. Astrophysical Solutions One way to solve the solar neutrino problem is to lower the central temperature of the Sun by a few percent. This will mean fewer high-energy nuclear reactions occurring in the solar core and thus, fewer neutrinos being produced and hence detected. There are a number of ways to lower the central solar temperature.