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Liquid scintillators for optical-fiber applications

Description: A multicomponent liquid scintillator solution for use as a radiation-to-light converter in conjunction with a fiber optic transmission system. The scintillator includes a quantity of 1, 2, 4, 5, 3H, 6H, 1 OH, tetrahydro-8-trifluoromethyl (1) benzopyrano (9, 9a, 1-gh) quinolizin-10-one (Coumarin) as a solute in a fluor solvent such as benzyl alcohol or pseudo-cumene. The use of BIBUQ as an additional or primary solute is also disclosed.
Date: June 1, 1981
Creator: Franks, L. A. & Lutz, S. S.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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Comparison of Calculated and Experimental Neutron Attenuation and Streaming Data for Fusion Reactor Design

Description: Integral experiments that measure the neutron and gamma-ray energy spectra resulting from the attenuation of approx. 14 MeV T(D,n)/sup 4/He reaction neutrons in laminated slabs of stainless steel type 304, borated polyethylene, and a tungsten alloy (Hevimet) and from neutrons streaming through a 30-cm-diameter iron duct (L/D = 3) imbedded in a concrete shield have been performed at the Oak Ridge National Laboratory. The facility, NE-213 liquid scintillator detector system, and experimental tech… more
Date: January 1, 1980
Creator: Santoro, R. T.; Alsmiller, R. G., Jr.; Barnes, J. M. & Chapman, G. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Monopole search using an accelerator detector

Description: A neutrino detector at the Brookhaven AGS has been used to investigate the feasibility of using an already constructed apparatus for GUT monopole searches. A flux limit (90%CL) of 5.2 x 10/sup -12/ cm/sup -2/ sec/sup -1/ str/sup -1/ was found. The limitations of such an approach are discussed.
Date: December 20, 1983
Creator: Ahrenes, L.A.; Aronson, S.H.; Connolly, P.L.; Erickson, T.E.; Gibbard, B.G.; Montag, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Upper limits on neutron bursts emitted from Ti pressurized D sub 2 gas cells

Description: In a search for bursts of neutrons from Ti in pressurized D{sub 2} gas cells, no statistically significant deviations from the background were observed for events where five or more neutrons are detected over a ten day experiment, including 103 hours of counting with cells on, and 28 hours counting of various backgrounds. Up to four cells were used including some 60 grams of 662-Ti fillings in a pressurized cylinder with 40-60 atmosphere of D{sub 2} gas. Other Ti samples were used too. The samp… more
Date: October 27, 1989
Creator: Rugari, S. L.; France, R. H., III; Gai, M.; Lund, B. J.; Smolen, S. D.; Zhao, Z. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The neutrino program at LAMPF

Description: There are two neutrino experiments that this paper discusses: the first experiment is designed to verify the interference between charged and neutral current amplitudes in {nu}{sub e}- e scattering. The experiment is situated at 90{degree} to the beam stop, and detected recoil electrons from neutrino electron scattering. The experiment is sensitive to recoil electrons from {nu}{sub {mu}}, {nu}{sub e}, {bar {nu}}{sub {mu}} but the cross section for {nu}{sub e} - e scattering is the dominant cont… more
Date: January 1, 1989
Creator: White, D. Hywel
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Multi-energy neutron detector for counting thermal neutrons, high-energy neutrons, and gamma photons separately

Description: This scintillation detector is composed of two scintillators optically coupled and mounted on a single photomultiplier tube. The first scintillator is a {sup 6}Li-loaded glass that has high efficiency for thermal neutrons, and the second is a liquid scintillator (BC 501) that has fairly high efficiency for higher energy neutrons. The {sup 6}Li glass scintillator emits light with a characteristic time constant of {approximately}60 ns, whereas light emitted in the liquid scintillator by proton re… more
Date: January 1, 1989
Creator: Chiles, M. M.; Bauer, M. L. & McElhaney, S. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ternary liquid scintillator for optical-fiber applications

Description: A multicomponent liquid scintillator solution for use as a radiation-to-light converter in conjunction with a fiber optic transmission system. The scintillator includes a quantity of 5-amino-9-diethylaminobenz (a) phenoxazonium nitrate (Nile Blue Nitrate) as a solute in a fluor solvent such as benzyl alcohol. The use of PPD as an additional solute is also disclosed. The system is controllable by addition of a suitable quenching agent, such as phenol.
Date: June 1, 1981
Creator: Franks, L. A. & Lutz, S. S.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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Measurement of tritium permeation through resistant materials near room temperature

Description: To measure tritium permeation through low-permeability materials at 50 to 170/sup 0/C, we use highly-sensitive liquid scintillation counting to detect the permeating tritium. To validate our method, we conducted extensive experiments with copper, for which much data exists for comparison. We report permeability of tritium through copper at 50, 100, and 170/sup 0/C, and discuss details of the experimental technique. Further plans are outlined. 15 refs., 5 figs., 1 tab.
Date: January 1, 1985
Creator: Maienschein, J.; DuVal, V.; McMurphy, F.; Uribe, F.; Musket, R. & Brown, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Multi-energy neutron detector for counting thermal neutrons, high-energy neutrons, and gamma photons separately

Description: The need for an improved, compact, wide-energy neutron detector for neutron monitoring and surveillance in nuclear facilities and weapons storage, where a possibility of fission excursion exists, led to development of a single detector that is sensitive to thermal neutrons, high-energy neutrons, and gamma radiation. Previously, separate detectors have been required to count these three different radiations separately. This development is a great advantage when experimental space is limited. 4 f… more
Date: January 1, 1989
Creator: Chiles, M. M. & McElhaney, S. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Data Acquisition for a Large Neutrino Detector

Description: A hierarchical, distributed intelligence data acquisition system which has been used for the past two years in neutrino experiments at Brookhaven National Laboratory is described. Performance characteristics and the nature of problems encountered in bringing the system to maturity are discussed and some generalizations of the experience are suggested.
Date: January 1, 1983
Creator: Ahrens, L. A.; Aronson, S. A. & Connolly, P. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Planning for the next generation of proton-decay experiments in the United States

Description: There are now three well-developed proposals for new proton decay detectors to be built in the United States. These are the 1000 to 5000-ton Soudan 2 tracking calorimeter, the 1400-ton Homestake II liquid scintillator Tracking Spectrometer, and the 2500-ton University of Pennsylvania liquid-scintillator - proportional-drift-cell calorimeter. These proposals were reviewed by the Department of Energy Technical Assessment Panel on Proton Decay in February 1982. I shall describe the Soudan and Penn… more
Date: January 1, 1982
Creator: Ayres, D.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Detectors for the Superconducting Super Collider, design concepts, and simulation

Description: The physics of compensation calorimetry is reviewed in the light of the need of the Superconducting Super Collider (SSC) detectors. The four major detector types: liquid argon, scintillator, room temperature liquids, and silicon, are analyzed with respect to some of their strengths and weaknesses. Finally, general comments are presented which reflect the reliability of simulation code systems. 29 refs., 20 figs., 6 tabs.
Date: January 1, 1989
Creator: Gabriel, T.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design optimization of liquid scintillator cosmic-ray veto detector with BBQ shifter

Description: Certain design characteristics of a liquid scintillator detector for charged cosmic particles, have been studied. These include evaluation of scintillator emission spectra, absorption in various thicknesses of BBQ shifter bars and effective transmission in long lengths of BBQ acrylic. For our BBQ sample, 12.5 mm thick with semicircular shape, the shifted light was transmitted with 2.0 m absorption length.
Date: October 1, 1981
Creator: Kruse, H. W.; Egdorf, S. S. & Simmons, D. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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nu/sub. mu. /C/sup 12/. -->. mu. /sup -/X cross section and nu/sub. mu. / - nu/sub e/ oscillation using the decay-in-flight source at Line-E of LAMPF

Description: This paper describes an experiment to measure the nu/sub ..mu../C/sup 12/ ..-->.. ..mu../sup -/X cross section and to detect nu/sub ..mu../ - nu/sub e/ oscillations. A test run was completed last year. The detector has been calibrated and backgrounds are under study. The sensitivity of the experiment is estimated for the 1985 LAMPF run cycle to be +-20% for the cross section measurement and the 90% confidence level limits for the neutrino oscillation experiment are sin/sup 2/2THETA < 10/sup -3/… more
Date: January 1, 1984
Creator: Clearwater, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement of long-lived isotopes in fusion materials

Description: Neutron cross section measurements are reviewed for the production of long-lived isotopes in fusion reactor materials. Samples were irradiated at 14.5 to 14.8 MeV at the RTNSII facility. Long-lived reaction products were detected using gamma and x-ray spectroscopy, liquid scintillation spectrometry, and accelerator mass spectrometry. Radiochemical separations were performed for many samples prior to analysis. Results are summarized for reactions leading to /sup 26/Al (720,000 y), /sup 53/Mn (3,… more
Date: January 1, 1987
Creator: Greenwood, L.R. & Bowers, D.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Search for Neutrino Oscillations at the Brookhaven AGS

Description: We report on a search for neutrino oscillations of the type nu/sub ..mu../ ..-->.. nu/sub e/ in a detector located an effective distance of 96m from the neutrino source in the wide band neutrino beam at the Brookhaven AGS. No excess of electron events was observed. The resulting upper limit on the strength of the mixing between nu/sub ..mu../ and nu/sub e/ in the case of large mass difference ..delta..m/sup 2/ = absolute value m/sub 1//sup 2/ - m/sub 2//sup 2/ between the neutrino mass eigensta… more
Date: February 20, 1985
Creator: Ahrens, L. A.; Aronson, S. H.; Connolly, P. L.; Gibbard, B. G.; Murtagh, M. J.; Murtagh, S. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of neutron multiplicity counters for safeguards assay

Description: This paper reports on the development of a new generation of neutron multiplicity counters for assaying impure plutonium. The new counters will be able to obtain three measured parameters from the neutron multiplicity distribution and will be able to determine sample mass, multiplication, and (..cap alpha..,n) reaction rate, making it possible to obtain a more matrix-independent assay of moist or impure materials. This paper describes the existing prototype multiplicity counters and evaluates t… more
Date: January 1, 1989
Creator: Ensslin, N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Liquid-scintillation alpha-detection techniques

Description: Accurate, quantitative determinations of alpha-emitting nuclides by conventional plate-counting methods are difficult because of sample self-absorption problems in counting and because of non-reproducible losses in conventional sample separation methods. Liquid scintillation alpha spectrometry offers an attractive with no sample self-absorption or geometry problems and with 100% counting efficiency. Sample preparation may include extraction of the alpha emitter of interest by a specific organic… more
Date: 1983~
Creator: McKlveen, John W. & McDowell, W. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutron spectra as a function of angle at two meters from the Little Boy assembly

Description: Measurements of neutron spectra produced by the Los Alamos National Laboratory (LANL) Little Boy replica assembly (Comet) were made with a combined multisphere and liquid scintillator system, that has been widely used at the Lawrence Livermore National Laboratory. The combined system was used for measurements at the side (90/sup 0/) and nose (0/sup 0/) of the assembly; additional measurements were made at 45/sup 0/ using only the liquid scintillator. Data were obtained at two meters from the ce… more
Date: July 2, 1984
Creator: Griffith, R.V.; Huntzinger, C.J. & Thorngate, J.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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New scintillators for fiber optics: system sensitivity and bandwidth as a function of fiber length

Description: Long-wavelength liquid scintillators have been developed for fiber-optic plasma-diagnostic experiments. Relative system sensitivity and bandwidth data as a function of fiber length for several scintillator systems will be presented.
Date: January 1, 1981
Creator: Lutz, S.; Franks, L. A.; Flournoy, J. M. & Lyons, P. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Energy spectra of the pneumatically positioned neutron sources at LLNL's Hazards control standards and calibration facility

Description: The Hazards Control Department of Lawrence Livermore National Laboratory maintains a Standards and Calibration Laboratory that includes three neutron sources (two /sup 252/Cf and one /sup 238/PuBe that can be positioned pneumatically for irradiations. Ten moderators exist to modify the neutron energy spectra produced by these sources. The thicknesses and materials of these moderators are: 25-cm water; 5-, 10-, 15-, and 25-cm heavy water; 20-cm aluminum; and 2-, 5-, 10-, and 15-cm polyethylene. … more
Date: June 15, 1987
Creator: Thorngate, J.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Use of liquid scintillation in the appraisal of non-radioactive waste shipments from nuclear facilities

Description: On the Savannah River Site (SRS), non-radioactive or clean waste, is normally assayed to appraise the extent of surface contamination by using a survey meter. Because of the nature of the operations conducted at SRS, the majority of the waste generated is treated as contaminated waste until proven otherwise. Before such waste can be shipped off-site, more rigorous assay must demonstrate compliance with government standards. In particular, it is necessary to appraise the samples with regard to t… more
Date: January 1, 1989
Creator: McDowell, W.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Studies of nuclei using radioactive beams. Progress report, May 1988--July 1989

Description: The 12 month period from May 1988 to July 1989 represents the first full year of our 18 month pilot program in nuclear structure research. In this period, research was initiated to develop a capability for radioactive secondary beams at Argonne National Laboratory using the Atlas and the new Fragment Mass Analyzer (FMA), which is currently under construction. Two major new detector facilities are currently in the final stages of design and testing. The Large-Area, Scintillator Telescope (LAST) … more
Date: July 1, 1989
Creator: Piercey, R. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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