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[en] In this paper, counting efficiency vs figure of merit for 19 electron capture radionuclides has been computed. Toluene based s c i n t i l l a t o r solution of 15 cm3 has been assumed in the computation. The relationships to obtain the probability per decay are given and the computed efficiency tabulated.(Author)
[en] In this paper it shall be tried to strike the balance after the first years of experimenting at the on-line mass separator of the GSI Darmstadt and to present the main results of the study of very neutron deficient isotopes in the mass range 90-150 as well as the resulting questions for further experiments. First some foundations concerning the properties of neutron deficient nuclei and the measuring method are explained. The results and their interpretation are discussed using examples for the alpha decay, the beta decay, the mass-energy-area, and the proton-drip line. Finally the obtained results are summarized, and an outlook to further studies of nuclear properties far from beta stability is given. (orig.)
[de]In der vorliegenden Arbeit soll versucht werden, nach den ersten Jahren des Experimentierens am On-line Massenseparator der GSI Darmstadt Bilanz zu ziehen und die wesentlichen Ergebnisse bei den Untersuchungen sehr neutronenarmer Isotope in der Massengegend 90-150 sowie die fuer weiterfuehrende Experimente sich ergebenden Fragestellungen darzustellen. Zunaechst werden einige Grundbegriffe zu den Eigenschaften neutronenarmer Kerne und zur Messmethode erlaeutert. Die Messergebnisse und ihre Interpretation werden an Hand von Beispielen fuer den Alphazerfall, den Betazerfall, die Masse-Energie-Flaeche und die Proton-Drip-Linie diskutiert. Abschliessend sollen die gewonnenen Erkenntnisse zusammengefasst und ein Ausblick auf weiterfuehrende Untersuchungen von Kerneigenschaften weitab von der Beta-Stabilitaetslinie gegeben werden. (orig.)
[en] Neutrinos are one of the most abundant elementary particles in the Universe. First hypothesized by Pauli in 1929 to explain beta decay, and successfully used by Fermi to formulate a successful Beta decay theory, we still know so little about the neutrinos. M G Mayer formulated a double beta decay theory for nuclei, which could not undergo single beta decay, but two simultaneous beta decays can make them achieve more stable state. Using Majorana’s results that neutrino and anti neutrino yield exactly same beta decay results, Furry showed that there is a possibility for neutrinoless double beta decay as well. Experiments are operational and better sensitive experiments are proposed to search this rare decay to prove the nature of neutrinos and determine precise mass scales and hierarchy of neutrino states
[en] The India’s TIN (TIN.TIN) detector is under development in the search of neutrinoless double-β decay (0νββ) using 90% enriched 124Sn isotope as the target mass. This detector will be housed in the upcoming underground facility of the India-based Neutrino Observatory. We present the most important experimental parameters that would be used in the study of required sensitivity for the TIN.TIN experiment to probe the neutrino mass hierarchy. The sensitivity of the TIN.TIN detector in the presence of sole two neutrino double-β decay (2νββ) background is studied at various energy resolutions. The most optimistic and pessimistic scenario to probe the neutrino mass hierarchy at 3σ sensitivity level and 90% CL are discussed. (author)
[en] The conference covers the topics: Dark Matter and Dark Energy, Cosmology and Gravity, Physics and Astrophysics of Neutrinos, Supernovae and Compact Objects, Gravitational Waves, High Energy Cosmic Rays and High Energy Gamma Ray Astrophysics. Papers relevant to INIS are indexed separately
[en] Thanks to the excellent energy resolution, high efficiency and versatility, bolometric detectors are primed for the search of neutrinoless double-beta decay (0νDBD). The most advanced bolometric experiment, CUORE, is studying the 0νDBD of "1"3"0Te using a 741 kg array of TeO_2 crystals. CUORE points to a 90% CL sensitivity on the half-life of 0νDBD of 9.5 × 10"2"5 yr in 5 yr, corresponding to an upper limit on the neutrino Majorana mass of 50–130 meV. This sensitivity will allow to touch, but not to explore, the region corresponding to the inverted hierarchy mass scenario. In this document I present the status of CUORE and the possible upgrades of the bolometric technology in view of a next generation experiment.
[en] Beta-decay half-lives have been calculated by a microscopic theory for nuclei with 6< or =Z< or =114 between the line of beta-stability and the neutron drip line. The calculated half-lives are independent of the present uncertainties of nuclear mass formulas. The accuracy of the predictions is considerably improved over that of an earlier prediction based on a ''gross theory'' of beta decay
[en] Future experiments on the search for the 0νββ decay will be sensitive to the effective Majorana mass in the region of the inverted mass hierarchy. If a positive signal is observed, a possibility to test models of calculation of nuclear matrix elements of the process will appear. We discuss this possibility in some detail.