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Measurement of the half-life of /sup 60/Fe using the Argonne FN tandem-superconducting Linac system as an accelerator mass spectrometer

Description: An experiment to improve the accuracy in the half-life value of /sup 60/Fe by measuring both the amount of /sup 60/Fe nuclei and the decay-rate of a spallation produced sample using the relation dN/dt = -lambda N is briefly discussed. (WHK)
Date: January 1, 1983
Creator: Kutschera, W.; Billquist, P.J. & Frekers, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Properties of neutrinos: Recent results

Description: Recent progress in experimental determinations of the properties of neutrinos is summarized. In particular, the extensive work on direct kinematic measurements of neutrino mass, on neutrino counting and on neutrino oscillations is highlighted. It is concluded that there may already be sufficient information to fix the masses of the neutrinos, but the evidence is still far from convincing. 63 refs., 13 figs.
Date: January 1, 1987
Creator: Robertson, R.G.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Investigaton of the beta strength function at high energy: gamma-ray spectroscopy of the decay of 5. 3-s /sup 84/As to /sup 84/Se

Description: The beta strength function up to approximately 8.6 MeV for the system /sup 84/As(..beta../sup -/)/sup 84/Se was investigated. It was found that it is not possible to satisfactorily describe S/sub ..beta../ by a statistical model. From the /sup 84/As decay scheme an experimental beta strength function was deduced. Additional information on the beta transition intensity is obtained from the gross coincidence spectra of individual gamma rays. In total these data suggest that the experimental beta … more
Date: June 1, 1981
Creator: Henry, E. A.; Lien, O. G., III & Meyer, R. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Decay of mass-separated /sup 118/Ag to levels in /sup 118/Cd

Description: A study of the gamma-ray de-excitation following the beta decay of /sup 118/Ag using the TRISTAN on-line isotope separator is reported. Gamma-ray singles, gamma-gamma coincidence, and gamma-ray multiscale measurements were made using Ge(Li) detectors. A total of 52 gamma rays were observed in the decay of /sup 118/Ag. Thirty-eight of these were placed in a level scheme for /sup 118/Cd consisting of 20 excited states up to 3382 keV. Gamma-ray multiscale measurements indicated that /sup 118/Ag ha… more
Date: April 1, 1978
Creator: Margetan, D. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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[Research programs from the University of South Carolina on High Energy Physics]. [119 Technical Progress Report]

Description: Work on three main experiments is summarized: (1) study of charm physics in a wide-band photon beam; (2) charmless two-body decays of b-flavored mesons and baryons studied with a ring imaging Cherenkov counter; and (3) the AMY Program, which studies e[sup +]e[sup [minus]] interactions using the TRISTAN collider at KEK, with emphasis on trigger upgrades. Future work related to the existence of a 17-keV neutrino in [beta] decay and [nu][sub [mu]]/[nu][sub [tau]] oscillation is described.
Date: January 1, 1993
Creator: Rosenfeld, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurement of low energy neutrino absorption probability in thallium 205

Description: A major aspect of the P-P neutrino flux determination using thallium 205 is the very difficult problem of experimentally demonstrating the neutrino reaction cross section with about 10% accuracy. One will soon be able to completely strip the electrons from atomic thallium 205 and to maintain the bare nucleus in this state in the heavy storage ring to be built at GSI Darmstadt. This nucleus can decay by emitting a beta-minus particle into the bound K-level of the daughter lead 205 ion as the onl… more
Date: January 1, 1986
Creator: Freedman, M.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Low-level gamma-ray spectrometry

Description: Low-level gamma-ray spectrometry generally equates to high-sensitivity gamma-ray spectrometry that can be attained by background reduction, selective signal identification, or some combination of both. Various methods for selectively identifying gamma-ray events and for reducing the background in gamma-ray spectrometers are given. The relative magnitude of each effect on overall sensitivity and the relative cost'' for implementing them are given so that a cost/benefit comparison can be made and… more
Date: October 1, 1990
Creator: Brodzinski, R.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutrino mass: Recent results

Description: Some recent developments in the experimental search for neutrino mass are discussed. Simpson and Hime report finding new evidence for a 17-keV neutrino in the {beta} decay of {sup 3}H and {sup 35}S. New data from Los Alamos on the electron neutrino mass as measured in tritium beta decay give an upper limit of 13.5 eV at the 95% confidence level. This result is not consistent with the long-standing ITEP result of 26(5) eV within a model-independent'' range of 17 to 40 eV. It now appears that the… more
Date: January 1, 1989
Creator: Robertson, R.G.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutrino mass experiments

Description: The current status of the experimental search for neutrino mass is reviewed, with emphasis on direct kinematic methods. Simpson and Hime report finding new evidence for a 17-keV neutrino in the ..beta.. decay of /sup 3/H and /sup 35/S. The situation concerning the electron neutrino mass as measured in tritium beta decay has not changed significantly in the last two years. We discuss the ''model independent'' lower limit of 17 eV obtained by the ITEP group in light of existing data on the /sup 3… more
Date: January 1, 1989
Creator: Robertson, R.G.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Beta and gamma decay-heat measurements for fast and thermal reactors, particularly for Pu-239

Description: The mounting evidence suggests (a) that the ORNL thermal-neutron fission decay heat data are likely correct to within stated uncertainties; (b) present data files (ENDF/B-V and others related to it) require more effort, and as improvements are made agreement with ORNL results is likely to become better; and (c) fast fission decay heat, induced by reactor-spectrum neutrons, appears to be little, if any, different from thermal-neutron fission-decay heat. The ANS 5.1 working group seems to be movi… more
Date: January 1, 1981
Creator: Dickens, J.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Searches for massive neutrinos in nuclear beta decay

Description: The status of searches for massive neutrinos in nuclear beta decay is reviewed. The claim by an ITEP group that the electron antineutrino mass > 17eV has been disputed by all the subsequent experiments. Current measurements of the tritium beta spectrum limit m[sub [bar [nu]]e] < 10 eV. The status of the 17 keV neutrino is reviewed. The strong null results from INS Tokyo and Argonne, and deficiencies in the experiments which reported positive effects, make it unreasonable to ascribe the spectral… more
Date: October 1, 1992
Creator: Jaros, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Double beta decay of U-238

Description: During the last period, two samples of 33 yr old uranyl nitrate have been examined for the accumulation of Pu-238 formed as a result of double beta decay. The 2.5 kg sample has led only to an upper limit of 6 {times} 10{sup 20} yr. The 8.5 kg sample has produced positive results corresponding to a half-life of 2 {times} 10{sup 21 } yr. The possibility of contaminating nuclear reactions has been carefully examined and eliminated. The possibility that contamination may have been introduced by the… more
Date: November 1, 1990
Creator: Turkevich, A. & Economou, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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US Department of Energy Quality Assessment Program data evaluation report

Description: The results of radiochemical analysis performed on the Quality Assessment Program (QAP) test samples are presented. This report reviews the results submitted by 26 participating laboratories for 49 different radionuclide-media combinations. 5 tables. (ACR)
Date: April 1, 1984
Creator: Jaquish, R.E. & Kinnison, R.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Focusing lenses for the 20-beam fusion laser, SHIVA

Description: The focus lens design for the 20-beam SHIVA laser fusion facility involves considerations of uniform and normal pellet illumination. The resulting requirements dictate tailored beam intensity profiles and vacuum-loaded thin lenses.
Date: May 18, 1976
Creator: O'Neal, W. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Los Alamos free molecular and atomic tritium beta decay experiment

Description: 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. … more
Date: January 1, 1986
Creator: Wilkerson, J. F.; Bowles, T. J.; Knapp, D. A.; Maley, M. P. & Robertson, J. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of soil and water at the Four Mile Creek seepline near the F H areas of SRS

Description: Several soil and water samples were collected along the Four Mile Creek (FMC) seepline at the F H Areas of the Savannah River Site. The samples were analyzed for concentrations of metals, radionuclides, and inorganic constituents. The results of the analyses are summarized below for the soil and water samples.
Date: June 20, 1990
Creator: Haselow, J. S.; Harris, M.; Looney, B. B.; Halverson, N. V. & Gladden, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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(The fate of nuclides in natural water systems)

Description: Our research at Yale on the fate of nuclides in natural water systems has three components to it: the study of the atmospheric precipitation of radionuclides and other chemical species; the study of the behavior of natural radionuclides in groundwater and hydrothermal systems; and understanding the controls on the distribution of radionuclides and stable nuclides in the marine realm. In this section a review of our progress in each of these areas is presented.
Date: January 1, 1989
Creator: Turekian, K.K. (Yale Univ., New Haven, CT (USA). Dept. of Geology and Geophysics)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Helium and deuterium permeability in O-rings. [Simulation of tritium]

Description: To obtain more information on gas permeation through elastomeric O-rings, studies were performed on Parker Seal Company O-rings, Nos. 2-113, 2-006, 3-904, and 3-906, all made of a nitrile rubber. Also included in the tests was a valve packing (Autoclave Engineers) encased in AE Valve 20A-2142. Permeation experiments were run usually in duplicate to 82.7 MPa (12,000 psi) with helium and deuterium at room temperature. The data are extrapolated to give values for tritium.
Date: October 27, 1976
Creator: Lakner, J. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Separation of tritium from gaseous and aqueous effluent systems

Description: Three processes are discussed for separating tritium from gaseous and aqueous effluent systems: separation in the gas phase using Pd-25 wt percent Ag alloy diffusion membranes; electrolytic separation in the aqueous phase using ''bipolar'' electrodes; and the countercurrent exchange of tritium-containing hydrogen gas with water on catalytic surfaces combined with separation by direct electrolysis. (LK)
Date: January 1, 1977
Creator: Kobisk, E. H.
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Partner: UNT Libraries Government Documents Department
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Numerical solution of the Schroedinger integral equation for dt. mu. Progress report

Description: The Schroedinger Integral Equation is derived for an N-body system, and solutions for required Green's functions are obtained. The initial method of numerical solution has yielded the correct ground states and lower excited states of He (test case) and dt..mu... Steps are being taken to improve the numerical accuracy.
Date: August 22, 1986
Creator: Morgan, D.L. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tritium-related materials problems in fusion reactors

Description: Pressing materials problems that must be solved before tritium can be used to produce energy economically in fusion reactors are discussed. The following topics are discussed: (1) breeding tritium, (2) recovering bred tritium, (3) containing tritium, (4) fuel recycling, and (5) laser-fusion fueling. (MOW)
Date: April 2, 1976
Creator: Hickman, R. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fusion component design for the moving-ring field-reversed mirror reactor

Description: This partial report on the reactor design contains sections on the following: (1) burner section magnet system design, (2) plasma ring energy recovery, (3) vacuum system, (4) cryogenic system, (5) tritium flows and inventories, and (6) reactor design and layout. (MOW)
Date: January 28, 1981
Creator: Carlson, G.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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