Interplay of particle, nuclear and atomic physics in rare weak decays

Details Interplay of particle, nuclear and atomic physics in rare weak decays Interplay of particle, nuclear and atomic physics in rare weak decays

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1304...85s&link_type=abstract

EXOTIC NUCLEI AND NUCLEAR/PARTICLE ASTROPHYSICS (III): From Nuclei to Stars. AIP Conference Proceedings, Volume 1304, pp. 85-93

Astronomy and Astrophysics

Astrophysics

Double Beta Decay, Electron Capture, Resonance, Nuclear Isospin, Neutrino Mass, Weak-Interaction And Lepton Aspects, Beta Decay, Double Beta Decay, Electron And Muon Capture, Resonance Reactions, Spin, Parity, And Isobaric Spin, Neutrino Mass And Mixing

Scientific paper

The neutrinoless double beta decays of atomic nuclei are considered at the present the most viable way to access the fundamenntal nature and absolute mass scale of the neutrino. Recently one sub-class of these decays, the neutrinoless double electron capture (0νECEC), has attracted a lot of attention due to its potential of detection. In particular, the resonant 0νECEC is of interest owing to the possible huge enhancement of the corresponding decay rate by a resonance condition. At present the mass differences of the involved atom pairs are being measured by the Penning trap technique for several potential resonant 0νECEC decays. By evaluating the associated nuclear matrix elements using nuclear-structure models one can access the half-lives of these decays and thus predict their detection potential in underground experiments in the future. The absolute mass scale of the neutrino can also be accessed through beta decays of small decay energy. In these cases the effects of atomic origin may introduce non-negligible, even dramatic effects for Q values in the regime of few hundreds of eV and below.

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