double beta decay


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double beta decay

[¦dəb·əl ¦bād·ə di′kā]
(nuclear physics)
A nuclear transformation in which the atomic number changes by 2 and the mass number does not change; either two electrons are emitted or two orbital electrons are captured.
References in periodicals archive ?
Context:Neutrinoless double beta decay is a currently unobserved process, but has wide implications for many fields in physics if the process is discovered.
If neutrinos are majorana particles, neutrinoless double beta decay (0[nu][beta][beta]) should occur.
The [[beta].sup.v] spectrum is expected to have definite spectrum corresponding to direct transition to levels in daughter nuclei in similarity to neutrinoless double beta decay; one of the possible broadening that could occur is due to original energy distribution of neutrinos.
The topics include physics potential and motivations for a muon collider, meson/baryon/tetraquark supersymmetry from superconformal algebra and light-front holography, neutrino mass ordering in future neutrinoless double beta decay experiments, searching for composite Higgs models at the Large Hadron Collider, and extensions of the Standard Model in multi-spinor field formalisms--visible and dark sectors.
Nineteen student posters update the Borexino solar neutrino detector in Italy, the COBRA experiment searching for neutrinoless double beta decay, the Germanium detector array, the Askar'yan radio array, the Karlsruhe tritium neutrino experiment, and the IceCube neutrino observatory.
Research at SURF is being conducted 4,850 feet beneath the earth's surface with the intention of building a 40-kilogram germanium detector, capable of detecting the theorized neutrinoless double beta decay. Detection might help to explain the matter-antimatter imbalance.
Topics include extra dimensions; The International Linear Collider; astrophysical aspects of neutrinos; leptogenesis; neutrino experiments; string theory, string model-building, and string phenomenology--a practical introduction; theoretical aspects of neutrino masses and mixings; searching for the Higgs boson; Z phenomenology and the LHC; neutrinoless double beta decay; and supersymmetry in elementary particle physics.
Context:This project is a study of the nucleon occupancies of neutrinoless double beta decay candidate nuclei using transfer reactions.
The ongoing and future neutrino based experiments including neutrinoless double beta decay and cosmological experiments would test the validity of present texture zero analysis.
Other topics include the ANTARES undersea neutrino telescope, the Majorana double beta decay experiment, five years of PAMELA in orbit, the search for heavy neutrino in rare kaon decays, and experimental signatures of superstrong magnetic fields in heavy ion collisions.
Also, double beta decay rate of [sup.100]Mo to the first excited [0.sup.+] state of [sup.100]Ru has been measured experimentally [2] using [gamma]-[gamma] coincidence technique.
In addition, the R & D and the construction of sources of Selenium for the research of the double beta decay have been successful.