In this case, beta decay is forbidden so the much rarer double-beta decay can occur. The energy spectrum is also a continuum. Neutrino experiments have also played a role in the understanding of weak interactions. Interactions in which the exchange of a charged W occur are called charged current interactions and those in which a neutral Z particle are exchanged are called neutral current interactions. The first observation of neutral current interactions was made in 1973 at the Gargamelle bubble chamber that was recording neutrino interactions at the CERN neutrino beam.
Neutrinos serve as a sensitive probe of the standard model.
There is also a lot of interest in neutrino oscillations because this seems to be the most sensitive avenue to study whether neutrinos have mass or not. Some of these topics are pursued in the neutrino oscillations page. Neutrinos provide a wealth of knowledge into how the sub-atomic world really works and still continue to surprise us. A link to this Neutrino Industry web site can provide further links to other neutrino experiments that might be of interest.