Download or read book Los Alamos Free Molecular and Atomic Tritium Beta Decay Experiment written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An initial measurement of the tritium beta spectrum spanning an energy range of 16.4 - 18.9 keV has been performed using a free molecular tritium gas source. With the data from this preliminary low statistics measurement (approx. 72 hours of data), we are able to set an upper limit on the electron-antineutrino mass of 36 eV at the 95% confidence level. Measurements with a gaseous source eliminate many of the ambiguities arising from uncertainties associated with solid-source-based measurements. The ultimate neutrino mass sensitivity of our system should be about 10 eV or less. 13 refs., 9 figs.
Download or read book Los Alamos Free Atomic Tritium Beta Decay Experiment written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An apparatus is under construction at Los Alamos to measure the beta spectrum of free tritium atoms and molecules. The tritium atoms decay in a gaseous windowless source and are analyzed by a Tret'yakov type toroidal field beta spectrometer. The ultimate sensitivity of the experiment to electron antineutrino mass is expected to be
Download or read book Los Alamos Experiment on the Beta Decay of Free Molecular Tritium written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 betas originating from the decay of free tritium molecules in a differentially pumped source region were momentum analyzed in a toroidal beta spectrometer with 36-eV resolution. The final state effects in molecular tritium are accurately known and the data thus allow us to set an upper limit of 29.3 eV on the anti nu/sub e/ mass at the 95% confidence level.
Download or read book Status of the Los Alamos Free Atomic Tritium Beta decay Experiment written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An experiment to study the beta-decay of tritium using a gaseous source of free (unbound) atomic tritium is currently underway in the Physics Division at Los Alamos. The use of free atomic tritium along with careful design of the measurement scheme should allow a definitive determination for an electron antineutrino mass approx. 10 eV.
Download or read book Experiment to Study The Beta decay of Free Atomic and Molecular Tritium For Determining Antineutrino Mass written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An apparatus is described which will allow the measurement of the .beta.-decay of free tritium atoms and molecules for determining antineutrino mass. It consists of an RF dissociator, a long cylindrical decay region open at both ends, a guide field, and a magnetic spectrometer.
Download or read book Progress Report on the Los Alamos Tritium Beta Decay Experiment written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements near the endpoint of the tritium beta-decay spectrum using a gaseous molecular tritium source yield an essentially model-independent upper limit of 27 eV on the /ovr .nu.//sub e/ mass at the 95% confidence level. Since demonstrating from this initial measurement the successful operation of a gaseous source based system, most of our effort has been concentrated towards the upgrade and optimization of the experimental apparatus. The emphasis of this work has been to eliminate or further reduce effects that generate systematic errors. Based on realistic projections from our initial measurement, an ultimate sensitivity to neutrino mass of 10 eV is expected. 12 refs., 1 fig.
Download or read book Los Alamos Science written by and published by . This book was released on 1996 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of Los Alamos Research written by Los Alamos National Laboratory and published by . This book was released on 1984 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Los Alamos Tritium Beta Decay Experiment written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Los Alamos tritium experiment employs a gaseous tritium source and a magnetic spectrometer to determine the mass of the electron antineutrino from the shape of the tritium beta spectrum. Since publication of the first result from this apparatus (m/sub nu/
Download or read book Limit on the Anti Nu sub E Mass in Free Molecular Tritium Beta Decay written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The question of a nonzero neutrino mass has received considerable attention since the claims of Lyubimov et al in 1980 were published which showed evidence for an electron antineutrino mass between 14 and 46 eV, with a best fit value of 35 eV. However, there are still considerable concerns about possible systematic problems in thier experiment. Many of these concerns revolve around the use of a tritiated valine source, in which the energy given up in final state excitations of the molecule following the veta decay of one of the tritium atoms is comparable to the size of the neutrino mass observed. The effect of these final state effects is difficult to calculate in a molecule as complex as valine. In addition, ionization energy loss and backscattering of the betas in traversing the solid source are appreciable and must be very accurately accounted for. These concerns have led us to carry out an experiment using free molecular tritium as the source material. The final state effects have been accurately calculated for the tritium molecule and the uncertainties in these calculations cannot generate a spurious neutrino mass greater than 1 eV. in addition, the energy loss in the source is small because the source consists of tritium only and there is no backscattering.
Download or read book Rice Meeting The Proceedings Of The 1990 Meeting Of The Division Of Particles And Fields Of The Aps In 2 Volumes written by Billy E Bonner and published by World Scientific. This book was released on 1990-11-19 with total page 1140 pages. Available in PDF, EPUB and Kindle. Book excerpt: DPF 90 at Rice University was planned as a major conference of truly international character which reviews recent developments in all areas of particle physics. Plenary session topics include new results from SLC, LEP, pp colliders, Heavy Quark Physics, High Energy Astrophysics. Two-day mini-conferences were held on the following subjects: Electroweak Physics, QCD and Hadron Physics, Theory Beyond the Standard Model, Non-accelerator Physics.
Download or read book High Energy Physics Proceedings Of The 25th International Conference In 2 Volumes written by Kok Khoo Phua and published by World Scientific. This book was released on 1991-07-15 with total page 1583 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings contains the talks delivered at the plenary and parallel sessions. Topics covered include e⁺e⁻ Physics at Z0, String Theory and Theory of Extended Objects, High Energy pp Physics, Non-Accelerator Particle Physics, Conformal Field Theory, e⁺e⁻ Physics below Z⁰, Structure Functions and Deep Inelastic Scattering, Neutrino Physics, Recent Developments in 2-Dimensional Gravity, Lattice Gauge Theory and Computer Simulations, CP Violation , Accelerator Physics, Cosmology and Particle Physics, Interface Between Particle and Condensed Matter Physics, Detector R&D, and Astroparticle Physics.
Download or read book High Energy Physics Index written by and published by . This book was released on 1992 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1986 with total page 1150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1985 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rare Nuclear Processes Proceedings Of The 14th Eps Nuclear Physics Conference written by P Povinec and published by World Scientific. This book was released on 1992-03-27 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
