«No other particle that we know of could have this property; the neutrino is the only one,» says neutrino physicist Jason Detwiler of the University of Washington in Seattle, who is a member of the KamLAND - Zen and Majorana Demonstrator neutrinoless double
beta decay experiments.
Mass measured by neutrinoless double
beta decay experiments is an effective mass, a kind of weighted average of the three neutrino masses.
Such a process «creates asymmetry between matter and antimatter,» says physicist Giorgio Gratta of Stanford University, who works on the EXO - 200 neutrinoless double
beta decay experiment.
Not exact matches
Four
experiments have recently published results showing no hint of the process, known as neutrinoless double
beta decay (SN: 7/6/02, p. 10).
With 30 times more germanium than the current
experiment, the planned one - ton
experiment would be able to spot the neutrinoless double -
beta decay of just one germanium nucleus per year.
In a 2015 report of the U.S. Nuclear Science Advisory Committee to the Department of Energy and the National Science Foundation, a U.S. - led ton - scale
experiment to detect neutrinoless double -
beta decay was deemed a top priority of the nuclear physics community.
«Our
experiment seeks to observe a phenomenon called «neutrinoless double -
beta decay» in atomic nuclei.
The KamLAND - Zen
experiment succeeded in dramatically improving the neutrinoless
decay search limit by combing an ultra-low background detector with an unprecedented amount of xenon - 136, the isotope where the double -
beta decay occurs.
These
experiments completed the observations of the particles involved in
beta decay and paved the way for use of the free neutrino to probe the nature of the weak interaction.
The Majorana
experiment will search for neutrinoless double
beta (0νββ)
decay in germanium - 76.
The
experiment seeks to observe a phenomenon in atomic nuclei called «neutrinoless double -
beta decay.»