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Two-photon interactions from Mark II at SPEAR

Description: Results on the two-photon production of the eta', f(1270), A/sub 2/(1310), and f'(1515) mesons at SPEAR energies are presented using data taken with the Mark II detector. The radiative width of the eta' has been determined to be GAMMA/sub ..gamma gamma../(eta') = 5.8 +- 1.1 keV (20% systematic uncertainty). Upper limits for the radiative widths of the f, A/sub 2/, and f' have been determined.
Date: May 1, 1980
Creator: Hollebeek, Robert
Partner: UNT Libraries Government Documents Department
open access

Muon number violating rare decays

Description: The experimental status of rare decays that violate muon number conservation is summarized, giving upper limits of their branching ratios with 90% confidence. All of the muon experiments share several common elements. They aim to identify the process sought through the measurement of kinematical variables. Large solid angles are required to reach very high sensitivities. The need for good resolution stresses technology in high-rate environments to suppress backgrounds. In order to understand th… more
Date: January 1, 1985
Creator: Cooper, M.D.
Partner: UNT Libraries Government Documents Department
open access

Open and hidden charm muoproduction. [209 GeV]

Description: New results are presented on open and hidden charm and bottom production by 209-GeV muons interacting in a magnetized steel calorimeter. The upper limit on the production of T states by muons is sigma(..mu..N ..-->.. ..mu..UPSILONX)B(UPSILON ..-->.. ..mu mu..) < 22 x 10/sup -39/ cm/sup 2/ (90% confidence level). The distributions of elastically produced psi's are consistent with s-channel helicity conservation (SCHC) and disagree with psi dominance. From analysis of dimuon final states the cros… more
Date: September 1, 1980
Creator: Clark, A.R.; Johnson, K.J. & Kerth, L.T.
Partner: UNT Libraries Government Documents Department
open access

RESFEN: A residential fenestration performance design tool

Description: This paper describes the development of a prototype PC-based computer program called RESFEN. The program calculates the heating and cooling energy performance and costs of residential fenestration systems. Regression analysis of a data base of DOE-2 building energy simulations of single- and two-story residential buildings was used to develop algrbraic expressions that form the basis of the calculation procedure. The user can vary geographic location, electricity and gas cost, infiltration and … more
Date: August 1, 1991
Creator: Sullivan, R.; Chin, B.; Arasteh, D. & Selkowitz, S.
Partner: UNT Libraries Government Documents Department
open access

Comparing the Floating Point Systems, Inc. AP-190L to representative scientific computers: some benchmark results

Description: Results are presented of comparative timing tests made by running a typical FORTRAN physics simulation code on the following machines: DEC PDP-10 with KI processor; DEC PDP-10, KI processor, and FPS AP-190L; CDC 7600; and CRAY-1. Factors such as DMA overhead, code size for the AP-190L, and the relative utilization of floating point functional units for the different machines are discussed. 1 table.
Date: March 27, 1980
Creator: Brengle, T.A. & Maron, N.
Partner: UNT Libraries Government Documents Department
open access

Place of HgI/sub 2/ energy-dispersive x-ray detectors

Description: After a review of solid-state conduction counters, in general, and of the history of mercuric iodide, in particular, the theory of operation of solid-state energy-dispersive HgI/sub 2/ detectors is dicusssed. The main factors which limit energy resolution in solid-state compound detectors are considered, including statistical fluctuations in charge generation, the window effect, trapping, inhomogeneities in the detector material, and electronic noise. Potential applications of room-temperature … more
Date: January 1, 1982
Creator: Dabrowski, A. J.; Huth, G. C.; Iwanczyk, J. S.; Kusmiss, J. H.; Barton, J. S.; Szymczyk, J. M. et al.
Partner: UNT Libraries Government Documents Department
open access

Spallation target-moderator-reflector studies at the Weapons Neutron Research facility. [800-MeV p]

Description: Basic neutronics data, initiated by 800-MeV proton spallation reactions, are important to spallation neutron source development and electronuclear fuel production. Angle-dependent and energy-dependent neutron production cross sections, energy-dependent and total neutron yields, thermal and epithermal neutron surface and beam fluxes, and fertile-to-fissile conversion ratios are being measured. The measurements are being done at the Weapons Neutron Research facility on a variety of targets and ta… more
Date: January 1, 1980
Creator: Russell, G. J.; Gilmore, J. S.; Prael, S. D.; Robinson, H. & Howe, S. D.
Partner: UNT Libraries Government Documents Department
open access

Variable Eddington factors and flux-limiting diffusion coefficients

Description: Variable Eddington factors and flux limiting diffusion coefficients arise in two common techniques of closing the moment equations of transport. The first two moment equations of the full transport equation are still frequently used to solve many problems of radiative or particle transport. An approximate analysis, developed by Levermore, exhibits the relation between the coefficients of the two different techniques. This analysis is described and then used to test the validity of several commo… more
Date: January 1, 1982
Creator: Whalen, P. P.
Partner: UNT Libraries Government Documents Department
open access

Phenomenological Analysis of Current Limits in Storage Rings

Description: The limitations on the current which can be stored in a storage ring was studied. A simple model is used for the impedance of the beam environment. Feedback systems are assumed to be used to their full capacity to provide beam stability and that in the frequency range where feedback can no longer be used Landau damping will determine how much current can be stored in the ring. Estimates are made for proton storage rings and for electron storage rings of interest as synchrotron radiation sources… more
Date: January 1, 1980
Creator: Pellegrini, C. & Sands, M.
Partner: UNT Libraries Government Documents Department
open access

Proper use of the Nordheim integral treatment for resonance processing

Description: The Nordheim integral treatment is an approximate method for determining the neutron spectra within materials containing resonance cross sections. These spectra are necessary to determine the flux-weighted multigroup data properly. In practice, the resonance material multigroup cross sections produced by use of Nordheim-generated spectra are combined with other multigroup cross sections, and further energy and spatial collapsing of the data is performed. The question arises of whether performin… more
Date: January 1, 1979
Creator: Pevey, R. E.; Dodds, H. L., Jr.; Greene, N. M. & Westfall, R. M.
Partner: UNT Libraries Government Documents Department
open access

Investigations of entrainment mortality among larval and juvenile fishes using a Power Plant Simulator

Description: A Power Plant Simulator (PPS) was constructed at the Oak Ridge National Laboratory to examine the component sources of entrainment mortality. This experimental apparatus circulates temperature-controlled water through a closed loop consisting of a pump, a condenser bundle, and vertically adjustable piping. Larval bluegill, channel catfish, carp, largemouth bass, and smallmouth bass and juvenile bluegill and mosquitofish were exposed to different combinations of pump speed and water temperatures… more
Date: January 1, 1980
Creator: Cada, G. F.; Suffern, J. S.; Kumar, K. D. & Solomon, J. A.
Partner: UNT Libraries Government Documents Department
open access

Transportable charge in a periodic alternating gradient system

Description: A simple set of formulas is derived which relate emittance, line charge density, matched maximum and average envelope radii, occupancy factors, and the (space charge) depressed and vacuum values of tune. This formulation is an improvement on the smooth limit approximation; deviations from exact (numerically determined) relations are on the order of +-2%, while the smooth limit values are in error by up to +-30%. This transport formalism is used to determine the limits of transportable line char… more
Date: May 1, 1985
Creator: Lee, E.P.; Fessenden, T.J. & Laslett, L.J.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of postulated LOF (loss-of-flow) events in PRISM and SAFR

Description: The PRISM and SAFR designs, as currently proposed by DOE, are designed for ''inherent'', as opposed to ''engineered'', safety. Brookhaven National Laboratory is supporting the initial NRC review of these advanced LMR concepts. A loss-of-flow (LOF) accident coupled with a failure of the reactor shutdown system is one of the major safety concerns in the advanced liquid metal reactor (LMR) evaluation effort. The analysis discussed here covers: (1) primary pipe break without pump trip, (2) primary … more
Date: January 1, 1987
Creator: Chan, B. C.; Van Tuyle, G. J.; Slovik, G. C. & Aronson, A. L.
Partner: UNT Libraries Government Documents Department
open access

XIX Recontre de Moriond. Summary talk

Description: The theoretical arguments for neutrino mass are reviewed, and the present status of searches for neutrino mass in neutrino oscillations, direct measurements and other experiments are summarized. 46 references.
Date: January 1, 1984
Creator: Rosen, S.P.
Partner: UNT Libraries Government Documents Department
open access

An analysis of risk reduction methods for interfacing system LOCAs at PWRs

Description: Interfacing system loss-of-coolant accidents (ISLs) refers to events where the integrity of the Reactor Coolant System (RCS) pressure boundary is breached through failure of isolation valves which separate a support system of lower design pressure. The overpressurization of the support system will affect its availability and may further affect the availability of various safety systems required to mitigate the accident. In addition, it may result in a scenario where primary coolant is directly … more
Date: January 1, 1988
Creator: Kohut, P.; Bozoki, G. & Fitzpatrick, R.
Partner: UNT Libraries Government Documents Department
open access

Survey of beam-beam limitations

Description: The effect of beam-beam interaction is known to limit the luminosity of electron-positron storage rings and will, no doubt, limit the proton-antiproton collision scheme for the SPS. While theorists are struggling to explain this phenomenon it is more instructive to list their failures than their rather limited successes, in the hope that experiments may emerge which will direct their endeavors. The search for a description of a nonlinear system as it approaches the limit in which ordered motion… more
Date: January 1, 1979
Creator: Courant, E; Cornacchia, M; Donald, M M.R.; Evans, L R; Tazzari, S & Wilson, E J.N.
Partner: UNT Libraries Government Documents Department
open access

Complex fragment emission in relativistic heavy ion collisions

Description: Data relative to proton and pion production produced in central collisions have been reviewed by S. Nagamiya. Therefore, the production of complex fragments is emphasized here. A presentation is made of experimental data on d, t, /sup 3/He emission and their discussion in terms of the existing models. The size of fireball derived from the analysis of complex fragments is compared to the results of pion interferometry experiment. Interesting features observed in the distribution of charged parti… more
Date: October 1, 1979
Creator: Lemaire, M.C.
Partner: UNT Libraries Government Documents Department
open access

Electrical and Magnetic Properties of Holmium Single Crystals

Description: Magnetic moment measurements are made on holmium single crystals (hcp) from 1.3 to 300 deg K in magnetic fields from 250 to 18,000 Oe, with the field applied along the c axis, the a axis, and a (1010) direction. The STA1010! direction is the direction of easy magnetization with an extrapolated effective moment per atom at saturation of 10.34 Bohr magnetons. Basal plane measurements show antiferromagnetism below the Neel temperature of 132 deg K with basal plane anisotropy occurring below 80 deg… more
Date: September 15, 1962
Creator: Strandburg, D. L.; Legvold, S. & Spedding, F. H.
Partner: UNT Libraries Government Documents Department
open access

Comment on the light-heavy majorana neutrino mechanism in no-neutrino double beta decay

Description: We review the cancellation mechanism between light and heavy neutrinos in no-neutrino double beta decay, and the limits on the mass and mixing angle for the heavy neutrino. We emphasize that the effective mass for no-neutrino double beta decay varies with atomic weight, being heavier the lighter the parent nucleus. A search for double beta decay in /sup 48/Ca will be an excellent test of this mechanism.
Date: January 1, 1984
Creator: Rosen, S. P.
Partner: UNT Libraries Government Documents Department
open access

Nuclear Contribution to the Heat Capacity of Terbium Metal

Description: The heat capacity of terbium metal was measured between 0.25 and 1.0 deg K. The high temperature data can be expressed as C = 28R x 10/sup -3/T/sup 2/ cal/ mole-deg. The data are compared with a Schottky formula for the heat capacity, assuming equal spacing between the nuclear hyperfine levels with an over-all spacing of beta = 0.45/ deg K, correspondlng to the high temperature expression above. The agreement is within experimental error except at the very lowest temperatures obtained. The effe… more
Date: October 1, 1961
Creator: Heltemes, E. C. & Swenson, C. A.
Partner: UNT Libraries Government Documents Department
open access

Energy dependence of the /sup 238/U thermal capture cross section. [25 to 450/sup 0/C]

Description: Integral activation measurements supported the thermal neutron energy dependence of /sup 238/U assumed in the ENDF/B-IV evaluation. The activation measurements were conducted in a thermally insulated graphite block at the side of the SP Reactor. The block was thermally heated to temperatures up to 450/sup 0/C. In addition to heating, gasolinium filters were used to tailor the neutron spectra incident on the foils. The metallic foils consisted of copper and depleted uranium. Copper served as the… more
Date: January 1, 1980
Creator: Baumann, N.P. & Owais, M.
Partner: UNT Libraries Government Documents Department
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