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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

Selected results from the Mark II at SPEAR

Description: Recent results on radiative transitions from the psi(3095), charmed meson decay, and the Cabibbo-suppressed decay tau ..-->.. K* ..nu../sub tau/ are reviewed. The results come primarily from the Mark II experiment at SPEAR, but preliminary results from the Crystal Ball experiment on psi radiative transitions are also discussed.
Date: June 1, 1980
Creator: Scharre, D.L.
Partner: UNT Libraries Government Documents Department
open access

Some physical aspects of higher twist

Description: A brief description of some of the physical origins of higher twist terms and their possible relevance to data is given. 13 references, 7 figures.
Date: May 1, 1980
Creator: Blankenbecler, R.
Partner: UNT Libraries Government Documents Department
open access

Low jitter spark gap switch for repetitively pulsed parallel capacitor banks

Description: A two-section air insulated spark gap has been developed for switching multi-kilojoule plus-minus charged parallel capacitor banks which operate continuously at pulse rates up to 20 pps. The switch operates with less than 2 ns jitter, recovers its dielectric strength within 2 to 5 ms and has not shown degraded performance in sequential test runs totaling over a million shots. Its estimated life with copper electrodes is > 10/sup 7/ shots. All preliminary tests indicate that the switch is sui… more
Date: January 1, 1980
Creator: Rohwein, G. J.
Partner: UNT Libraries Government Documents Department
open access

Tests of perturbative quantum chromodynamics in photon-photon collisions

Description: The production of hadrons in the collision of two photons via the process e/sup +/e/sup -/ ..-->.. e/sup +/e/sup -/X can provide an ideal laboratory for testing many of the features of the photon's hadronic interactions, especially its short-distance aspects. That part of two-photon physics which is particularly relevant to tests of perturbative QCD is reviewed here. 6 figures.
Date: January 1, 1979
Creator: Brodsky, Stanley J.
Partner: UNT Libraries Government Documents Department
open access

A-dependence of inclusive hadron scattering at 100 GeV. Fermilab-Conf-80/47-Exp

Description: An experiment was performed to study the inclusive processes a/sup +/ + A ..-->.. c/sup + -/ + X, where a and c are either ..pi.., K, or p. The nuclear targets used were C, Al, Cu, Ag, and Pb. The Feynman x and p/sub T/ dependence of particle c was studied using the Fermilab Single Arm Spectrometer. In this paper cross sections are presented as a function of x at transverse momenta of 0.3 and 0.5 GeV/c for each target nucleus. The A-dependence is parameterized as sigma/sub A/ = sigma/sub 0/A… more
Date: January 1, 1980
Creator: Brenner, A. E.; Carey, D. C. & Elias, J. E.
Partner: UNT Libraries Government Documents Department
open access

Charmonium studies with the crystal ball

Description: The Crystal Ball detector at SPEAR is used to analyze the decays psi' ..-->.. ..gamma gamma..psi and psi' ..-->.. ..gamma..chi,chi ..-->.. ..gamma gamma... Values are obtained for the branching ratios of psi' ..-->.. eta/..mu../sup 0/psi and psi' ..-->.. ..gamma..chi,chi ..-->.. ..gamma..psi. No evidence is found for a 2/sup 1/S/sub 0/(eta'c) state in the mass range 3129 ..-->.. 3644 MeV/c/sup 2/. Analysis of the angular distributions in the cascade chi decays yields spin and multipole assignme… more
Date: June 1, 1980
Creator: Oreglia, M.
Partner: UNT Libraries Government Documents Department
open access

(p,n) reaction at intermediate energy. [100 to 200 MeV]

Description: The use of the (p,n) reaction in exploring effective interactions is reviewed. Some recent data on self-conjugate nuclei taken at the Indiana University Cyclotron Facility (IUCF) are presented, and the differences between low- and high-energy data are emphasized. Experimental problems and techniques used are briefly described. It is concluded that forward-angle (p,n) spectra at energies greater than 100 MeV are dominated by Gamow-Teller (GT) transitions, while Fermi transitions (IAS transitions… more
Date: January 1, 1979
Creator: Goodman, C. D.
Partner: UNT Libraries Government Documents Department
open access

Magnetic susceptibility of /sup 249/Bk metal

Description: Magnetic susceptibility measurements have been made on a sample of /sup 249/Bk metal using a SQUID micromagnetic susceptometer.
Date: January 1, 1979
Creator: Nave, S.E.; Huray, P.G. & Haire, R.G.
Partner: UNT Libraries Government Documents Department
open access

Experimental study of the steady natural convection in a horizontal annulus with irregular boundaries

Description: The natural convective heat transfer across an annulus with irregular boundaries was studied using a Mach-Zehnder interferometer. The annulus was formed by an inner hexagonal cylinder and an outer concentric circular cylinder. This configuration models, in two dimensions, a liquid metal fast breeder reactor spent fuel subassembly inside a shipping container. During the test, the annulus was filled with a single gas, either neon, air, argon, krypton, or xenon, at a pressure of about 0.5 MPa. Fro… more
Date: January 1, 1980
Creator: Boyd, R.D.
Partner: UNT Libraries Government Documents Department
open access

Analysis of fluorescent particle tracer data

Description: Four fluorescent particle tracer experiments were conducted during the July 1979 ASCOT experiment in the Anderson Creek Valley of northern California. The purpose of the experiment was to examine the transport and elongation of a plume traveling in the Anderson Creek nocturnal drainage flow and investigate the interaction of the Anderson Creek and Putah Creek flow fields. Sequential samples of tracer material at three downwind locations in Anderson Creek gave effective transport velocities of 1… more
Date: January 1, 1980
Creator: Clements, W.E.
Partner: UNT Libraries Government Documents Department
open access

Strain distribution and model for formation of eastern Umtanum Ridge anticline, south-central Washington

Description: Umtanum Ridge in south-central Washington is the topographic expression of a complex anticline within the Yakima Fold system in the Miocene Columbia River Basalt Group. The Yakima Fold system, which is partly contained within the Hanford Site, is an example of a layered basalt sequence folded near the surface of the earth. The Pasco Basin stratigraphic nomenclature is used in this repot. Rockwelll Hanford Operations, under contract to the US Department of Energy, is investigating the feasibilit… more
Date: October 1, 1979
Creator: Price, E.H.
Partner: UNT Libraries Government Documents Department
open access

/sup 18/O + /sup 12/C fusion-evaporation reaction

Description: A study of the /sup 18/O + /sup 12/C fusion evaporation reaction has been undertaken for 2 reasons: to make a systematic study of the formation cross section for each individual evaporation residue over a broad excitation energy region in the compound nucleus /sup 30/Si:30 to 62 MeV; and to compare all results to fusion-evaporation calculations done in the framework of the Hauser-Feschbach statistical model.
Date: January 1, 1980
Creator: Heusch, B.; Beck, C.; Coffin, J. P.; Freeman, R. M.; Gallmann, A.; Haas, F. et al.
Partner: UNT Libraries Government Documents Department
open access

Studies of the strain-dependent properties of A15 filamentary conductors at Brookhaven National Laboratory

Description: Work at BNL pertaining to the strain response of filamentary bronze-processed superconductors is reviewed. This work includes the intrinsic strain dependence of the critical properties of A15 structure compounds, the nature of the initial internal strain state of composite conductors, and the interplay between these residual strains and applied strains which governs the response of the conductor to external strain. Some factors which can enhance the strain tolerances of filamentary conductors a… more
Date: January 1, 1980
Creator: Luhman, T & Welch, D O
Partner: UNT Libraries Government Documents Department
open access

Search for extreme states in nuclear matter (or looking for collective phenomena)

Description: After some introductory background material, the report discusses data from single-particle inclusive reactions with emission of nucleons and pions. The anomalous neutron-to-proton ratio is explained; pion data show a possible indication of a long-lived fireball. The other major topic is multiparticle correlations (noninclusive data). The energy dissipation in the target nucleus and the process of total disintegration (target explosion) leads over to pressure effects (bounce-off) in the heavy f… more
Date: March 1, 1980
Creator: Gutbrod, H.H.
Partner: UNT Libraries Government Documents Department
open access

Search for narrow structures in the anti pp annihilation cross section from 1925 to 1955 MeV

Description: The anti pp annihilation cross section has been measured over the CM energy range 1925 to 1955 MeV with an RMS resolution of +-2.5 MeV on the average. This search yields no evidence for narrow enhancements in the S(1936) region. Using an A + B/p dependent background, a two standard deviation upper limit of 9 mb-MeV is set for the integrated area of any resonance with mass between 1936 and 1942 and with width less than or equal to 4 MeV.
Date: January 1, 1980
Creator: Lowenstein, D I; Peaslee, D C & Bromberg, C
Partner: UNT Libraries Government Documents Department
open access

Two-photon results from SPEAR

Description: Results obtained by two experiments at SPEAR on the two-photon production of lepton pairs and resonances are reported. Both experiments find agreement of lepton production with QED expectations, and observe an enhancement of the ..pi pi.. mass spectrum in the 1250 MeV/c/sup 2/ region. The Mark II finds this enhancement not consistent with the decay of the f(1270 MeV/c/sup 2/) alone. The ..gamma gamma.. partial width of the eta' has also been measured by the Mark II.
Date: September 1, 1980
Creator: Roussarie, A.
Partner: UNT Libraries Government Documents Department
open access

Muon spin depolarization in nonmagnetic metals doped with paramagnetic impurities

Description: The diffusion of muons and their magnetic interactions are treated by describing the physics to be learned from experiments which measure muon depolarization in metallic hosts doped with dilute concentrations of magnetic impurities. (GHT)
Date: January 1, 1980
Creator: Heffner, R.H.
Partner: UNT Libraries Government Documents Department
open access

Reaction of hydrogen and oxygen in the presence of concretes incorporating simulated radioactive waste

Description: The radiolysis of contained water, with the potential of pressurization due to the accumulation of these radiolytically produced gases, has been identified as a major concern for radioactive wastes fixed in cementitious matrices. One estimate of the pressure build-up is that about 100 atmospheres pressure could accumulate in a standard canister containing alpha waste after 100,000 years. Since the radiolysis of concrete is dependent on the amount of unbound or free water present in the system, … more
Date: January 1, 1979
Creator: Katz, S.
Partner: UNT Libraries Government Documents Department
open access

Photon-gluon fusion: a review

Description: A brief review of the photon-gluon fusion model for heavy quark (virtual) photoproduction is presented. It is compared with existing data, and some difficulties and speculations are discussed. 12 figures.
Date: November 1, 1979
Creator: Leveille, J.P.
Partner: UNT Libraries Government Documents Department
open access

Determination of in-situ thermal properties of Stripa granite from temperature measurements in the full-scale heater experiments: method and preliminary results. Technical information report No. 24

Description: The in-situ thermal conductivity and thermal diffusivity of a granite rock mass at the Stripa mine, Sweden, have been extracted from the first 70 days of temperature data for the 5 kW full-scale heater experiment by means of least-squares fit to a finite-line source solution. Thermal conductivity and thermal diffusivity have been determined to be 3.69 W/(m-/sup 0/C) and 1.84 x 10/sup -6/ m/sup 2//s, respectively, at an average rock temperature of 23/sup 0/C (the average value of the actual temp… more
Date: May 1, 1979
Creator: Jeffry, J.A.; Chan, T.; Cook, N.G.W. & Witherspoon, P.A.
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

Evaluation of a modified Gaussian plume model for travel distances 25 to 150 KM

Description: Gaussian plume model was developed and evaluated using observed Kr-85 air concentration data. The main features of the model include: segmented plumes and displaced effective source terms; reflective upper and lower boundaries; and formulations describing the effects of time-varying mixing height. The model was evaluated in terms of goodness factor, root mean square error, percentage of hits, and percentage of observed and calculated concentrations within a factor of 2 and 10. The test results … more
Date: January 1, 1980
Creator: Huang, J.C.
Partner: UNT Libraries Government Documents Department
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