Double-beta decay is the rarest known kind of radioactive decay; it has been observed for only 12 isotopes, and all of them have a mean lifetime of more than 10 19 yr. For some nuclei, the process occurs as conversion of two protons to neutrons, with emission of two electron neutrinos and absorption of two orbital electrons ( double electron capture ).
Developments in the theoretical investigation of nuclear double-beta decay are reviewed. In particular, the neutrinoless mode is discussed in detail, since it is sensitive to lepton number violation as predicted by gauge theories beyond the standard model and it is expected to give important information on the nature of the neutrinos and the weak interaction.
The neutrinoless double beta decay can yield the neutrino mass, if the neutrino is a Majorana particle. In the Standard Model, the neutrinoless double beta decay is not allowed but it is allowed.
In nuclear physics, double beta decay is a type of radioactive decay in which two neutrons are simultaneously transformed into two protons, or vice versa, inside an atomic nucleus.As in single beta decay, this process allows the atom to move closer to the optimal ratio of protons and neutrons.As a result of this transformation, the nucleus emits two detectable beta particles, which are.
The future experiments being assembled or proposed to search for Double Beta Decay are presented and discussed with peculiar focus on the searches for the neutrinoless channel. Extension to larger masses of experiments presently running with conventional detectors is considered. Special attention is devoted to new techniques, which could allow to overcome the limitation of the presently.
Neutrinoless double-beta decay is a decay mode of an atomic nucleus in which two neutrons convert to two protons and two electrons. This process has not been observed, and it is not known whether it exists. If this decay occurs, the neutrino is its own antiparticle, or a Majorana particle. The observation of neutrinoless double-beta decay would determine whether the neutrino is a Majorana.
We review recent developments in double-beta decay, focusing on what can be learned about the three light neutrinos in future experiments. We examine the eff.
We review the recent developments in the field of nuclear double beta decay, which is presently an important topic in both nuclear and particle physics. The.