  The recent neutrino oscillation experimental results indicate that at least
one neutrino has a mass greater than 50 meV. The next generation of double-beta
decay experiments will very likely have a sensitivity to an effective Majorana
neutrino mass below this target. Therefore this is a very exciting time for
this field of research as even null results from these experiments have the
potential to elucidate the nature of the neutrino.
