Results 1 - 10 of 1746
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[en] We show that comparisons between different reactor experiments do not presently allow to unambiguously prove or disprove neutrino oscillations. Requirements for new generation experiments are deduced from Monte Carlo studies. Finally, the present status and prospects of the Bugey experiment are given. 8 refs
[en] The electron antineutrino background from reactors is estimated in proposed LAGUNA sites using commercial fission reactors operational in 2009. Calculations are made for an input to background studies like e.g. geoneutrino measurement uncertainty estimation.
[en] We consider theoretically ionization of a helium atom by impact of an electron antineutrino. The sensitivity of this process to neutrino magnetic moments is analyzed. In contrast to the recent theoretical prediction, no considerable enhancement of the electromagnetic contribution with respect to the free-electron case is found. The stepping approximation is shown to be well applicable practically down to the ionization threshold.
[en] These proceedings summarize the first MiniBooNE electron antineutrino appearance search results, corresponding to a data sample collected for 3.39 x 1020 protons on target (POT). The search serves as a direct test of the LSND oscillation signature, and provides complementary information which can be used in studies addressing the MiniBooNE neutrino-mode low-energy excess
[en] The 82-year-long history of searches for the neutrino mass is associated with the names of many prominent physicists. The aim of the KATRIN project is to set the upper limit on the effective electron antineutrino mass in tritium β-decay at the level of 0.2 eV/c2. The basic parameters of the setup are given. Measurements with nonradioactive gases are to be initiated in September 2016, and data taking with tritium should start in 2017. Possible experiments beyond the original KATRIN program are discussed.
[en] The beta spectrum of the decay of free molecular tritium has been accurately measured in order to search for a finite anti nu/sub e/ mass. The final state effects in molecular tritium are accurately known and the data thus yield an essentially model independent upper limit of 29 eV on the anti nu/sub e/ mass at the 95% confidence level. 17 refs., 4 figs., 1 tab
[en] We set an upper limit of 8 eV for the mass of the electron antineutrino from studying the beta decay of tritium. We use a gaseous molecular tritium source, a high resolution magnetic spectrometer and a low background counting system to minimize the systematic errors encountered in these measurements. Our calibration data with radioactive 83mKr enables us to measure our system response function and a good deal of atomic physics data. In addition to our end point results we have made the first measurement of the tritium beta decay spectrum below 200 keV. We find an excess of very low energy electrons which arise from molecular processes of the 3He-T+ ion