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in publisher: "Columbia University"

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Strange particle production in neutrino-neon charged current interactions

Neutral strange particle production in charged-current muon-neutrino interactions have been studied in the Fermilab 15-foot neon bubble chamber. Associated production is expected to be the major source of strange particles in charged-current neutrino interactions. sigma-neutral and xi-minus production by neutrinos was observed. The dependence on various leptonic and hadronic variables is investigated. A fit to single and associated production of s, s/anti-s, and c quarks is described based on t… more

Date: January 1, 1986

Creator: Plano, R.; Baker, N. J.; Connolly, P. L.; Kahn, S. A.; Murtagh, M. J.; Palmer, R. B. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Transport and transfer rates in the waters of the continental shelf. Annual report

The goal of govern project is to understand and quantify the processes that the transport and dispersal of energy-related pollutants introduced to the waters of the continental shelf and slope. The report is divided into sections dealing with processes associated with suspended solids; processes associated with sediments sinks for radionuclides and other pollutants; and spreading of water characteristics and species in solution. (ACR)

Date: September 1, 1980

Creator: Biscaye, P. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Experimental high temperature coefficients of compressibility and expansivity of liquid sodium and other related properties

The subcooled compressibility of liquid sodium was directly measured up to 200 atm between 900 K and 1867 K, utilizing a new multi-property apparatus which was previously tested with water. The experimental data were correlated by a 6-term equation with a standard deviation of 9.2 percent. The equation can be used to estimate the subcooled compressibilities and densities of liquid sodium up to 2300 K and 500 ata. The thermal expansion of liquid sodium was also measured along the isobars 1 ata, … more

Date: January 1, 1977

Creator: Das Gupta, S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Proton microprobe analysis of zinc in skeletal tissues. [Proton induced x-ray emission analysis]

A proton microprobe with windowless exit port was used to study zinc distributions in various types of skeletal tissues. The use of an external beam facilitated positioning of the targets for examination of particular points of interest. The proton microprobe is uniquely suited to this work since it combines high sensitivity for zinc determinations in thick samples with good spatial resolution. Measurements on rat and rabbit Achilles tendon showed a significant increase in zinc concentrations a… more

Date: June 1, 1980

Creator: Doty, S. B.; Jones, K. W.; Kraner, H. W.; Shroy, R. E. & Hanson, A. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Effect of hydrogen (deuterium) on properties of fusion power reactor first wall alloys

Candidate first wall fusion reactor materials were subjected to a deuterium bombardment comparable to that of anticipated reactors. Significant microstructural and mechanical damage modes were observed. The mechanisms involved and the relevance of deuterium interactions to fusion are discussed.

Date: January 1, 1977

Creator: Panayotou, N. F. & Gross, R. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Preliminary results on nu/sub. mu. / + e/sup -/. -->. nu/sub. mu. / + e/sup -/

We present here preliminary results on a recent experiment on nu/sub ..mu../ - e/sup -/ elastic scattering. A brief review of the Glashow-Salam-Weinberg theory is given, indicating how the measurement of the total cross section gives rise to an ambiguous solution for sin/sup 2/ THETA/sub w/, and showing how the differential cross section can be used to resolve the ambiguity. The experimental configuration and the extraction of the signal are described. The data are compared with those from our … more

Date: June 1, 1982

Creator: Baker, N.J.; Connolly, P.L. & Kahn, S.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Towards a quantitative approach to the utilization of magnetic effects as a means of isotopic enrichment

The photolysis of methyldesoxybenzoin in sodium dodecyl sulfate micellar solutions, produces benzaldehyde and styrene as disproportionation products of the triplet geminate radical pair. We have found that both the benzaldehyde and the recovered methyldeoxybenzoin are enriched in 13-C. These results provide the first direct evidence that both recombination and disproportionation are identically selective to the magnetic isotope effect, an important point anticipated by theory, but previously un… more

Date: May 1, 1992

Creator: Turro, N.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

(Ion temperature gradient instability and transport: Progress report)

Anomalous ion thermal conductivity remains in open physics issue for the present generation of high temperature Tokamaks. It is now believed to be due to the Ion Temperature Gradient (ITG or n{sub i}) instability. The production and identification of this instability is being studied in the simpler and experimentally convenient configuration of the steady state Columbia Linear Machine (CLM). The slab branch of this instability has been produced (by two different heating methods), identified and… more

Date: January 1, 1992

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Limits on likesign dilepton production in nu/sub. mu. / interactions

We have searched for the production of likesign dilepton events (nu/sub ..mu../ + Ne ..-->.. ..mu../sup -/ + e/sup -/ + ...) in a wideband neutrino beam at FNAL using the 15' bubble chamber. We observe no signal above the background arising from conventional sources. We set 90% confidence level upper limits for the production rates of (nu/sub ..mu../ + Ne ..-->.. ..mu../sup -/ + e/sup -/ + ...)/(nu/sub ..mu../ + Ne ..-->.. ..mu../sup -/ + ...) less than or equal to 8 * 10/sup -5/ and (nu/sub ..… more

Date: May 21, 1985

Creator: Baker, N. J.; Connolly, P. L.; Kahn, S. A.; Murtagh, M. J.; Palmer, R. B.; Samios, N. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Membrane-controlled processes for the energy-efficient conversion of sludges to fuels and marketable chemicals

Studies were carried out on the concentration of primary and secondary sludges by ultrafiltration, and the operation of a membrane-assisted anaerobic digester to treat these sludges. Auxiliary devices including water-spilling and membrane solvent extraction were tested for their feasibility in the ehhancement of digester operations and the recovery of valuable byproducts. It was shown that membrane-facilitated digestion can increase the rate of these processes by a factor of ten, together with … more

Date: March 1, 1982

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Time series analysis of records of asthmatic attacks in New York City. [Relation to air pollution]

One of several methods developed to search for temporo-spatial patterns in the health variable, as an alternative method to overcome certain shortcomings that afflict the usual techniques of studying the acute health effects of air pollution by multiple regression analyses, were used in an epidemiological study of asthmatic attacks in two areas of New York City (Harlem and Brooklyn), where aerometric monitoring stations are located to provide data on daily fluctuations in air pollution levels. … more

Date: January 1, 1977

Creator: Goldstein, I F & Rausch, L E

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Study of direct single photons and correlated particles in proton-proton collisions at. sqrt. s = 62. 4 GeV

As part of a study of large p/sub T/ phenomena in proton-proton collisions at the CERN ISR, a search for direct single photon production has been performed. A statistical division of the data sample into the fraction consistent with single photon production and the fraction due to multiphoton decays of neutral hadrons is accomplished by measuring the average conversion probability for the sample in a one radiation length thick converter. The fraction of the sample attributable to direct single … more

Date: January 1, 1980

Creator: Angelis, A. L. S.; Besch, H. J. & Blumenfeld, B. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Photogenerated carrier-induced reactions on uhv semiconductor surfaces

The objective for this experimental work was to examine the reaction mechanisms, half-collision dynamics, and other optically induced chemical effects, that are operable on a well characterized single-crystal semiconductor surface. Of particular interest were reactions induced by charge transfer from the semiconductor surface including hot carrier and thermalized carrier processes. The primary technique to measure the desorbed fragment translational energies was time-of-flight mass-spectroscopy… more

Date: May 28, 1992

Creator: Osgood, R.M. Jr.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The impact of changing land use, nitrate deposition and CO sub 2 fertilization on soil carbon storage

This research strives to assess the impact of changing land use, nitrate deposition and CO{sub 2} fertilization on soil carbon storage. Our motivation is that this reservoir is the most likely candidate for the so-called missing carbon sink. We are working on several aspects of this problem by measuring carbon content, nitrogen content and radiocarbon ratios in paired soil samples from neighboring sites, to determine the impact of land use on soil carbon inventories and turnover times. We are a… more

Date: May 21, 1992

Creator: Harrison, K. & Broecker, W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Nanodosimetry and nanodosimetric-based models of radiation action for radon alpha particles

The objective of our research work is to provide -- with the aid of biophysical models of radiation action -- information on human risks following exposure to radon alpha particles. The approach proposed consists of (1) developing appropriate models (parametric and non-parametric) for alpha radiation induction of relevant end points (survival, cellular transformation), (2) providing an accurate physical characterization of the particle tracks in terms of nanodosimetric distributions, (3) suppor… more

Date: January 1, 1992

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Alfven wave. [Book on linear and nonlinear properties for fusion applications]

Seven chapters are included. Chapters 1 and 2 introduce the Alfven wave and describe its linear properties in a homogeneous medium. Chapters 3 and 4 cover the effects of inhomogeneities on these linear properties. Particular emphasis is placed on the appearance of a continuum spectrum and the associated absorption of the Alfven wave which arise due to the inhomogeneity. The explanation of the physical origin of absorption is given using kinetic theory. Chapter 5 is devoted to the associated pla… more

Date: November 1, 1978

Creator: Hasegawa, A. & Uberoi, C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Experimental Research on the Laser Cyclotron Auto-Resonance Accelerator “LACARA”

The Laser Cyclotron Auto-Resonant Accelerator LACARA has successfully operated this year. Results are summarized, an interpretation of operating data is provided in the body of the report, and recommendations are made how the experiment should be carried forward. The Appendix A contains a description of the LACARA apparatus, currently installed at the Accelerator Test Facility, Brookhaven National Laboratory. This report summarizes the project, extending over three grant-years.

Date: November 11, 2008

Creator: Marshall, T C

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

MINERAL-SURFACTANT INTERACTIONS FOR MINIMUM REAGENTS PRECIPITATION AND ADSORPTION FOR IMPROVED OIL RECOVERY

During this reporting period, further fundamental studies were conducted to understand the mechanism of the interactions between surfactants and minerals with the aim of minimizing chemical loss by adsorption. The effects of pH and mixing ratio on the chemical loss by adsorption were investigated. Some preliminary modeling work has been done towards the aim of developing a guide book to design optimal polymer/surfactant formula based on the understanding of adsorption and orientation of surfact… more

Date: April 30, 2006

Creator: Somasundaran, P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Site Selection for DOE/JIP Gas Hydrate Drilling in the Northern Gulf of Mexico

Studies of geologic and geophysical data from the offshore of India have revealed two geologically distinct areas with inferred gas hydrate occurrences: the passive continental margins of the Indian Peninsula and along the Andaman convergent margin. The Indian National Gas Hydrate Program (NGHP) Expedition 01 was designed to study the occurrence of gas hydrate off the Indian Peninsula and along the Andaman convergent margin with special emphasis on understanding the geologic and geochemical con… more

Date: July 1, 2008

Creator: Collett, T. S.; Riedel, M.; Cochran, J. R.; Boswell, R. M.; Kumar, Pushpendra & Sathe, A. V.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of Same-Sign Dimuon Production in High-Energy Neutrino Interactions

We present rates for same-sign dimuon production in neutrino-iron interactions with energies of 30 to 600 GeV. We find 101 neutrino and 15 anti-neutrino induced same-sign dimuons with muon momenta above 9 GeV/c. A detailed calculation indicates that the overall level and kinematic distributions of conventional backgrounds are consistent with the data. There is no convincing indication of new physical processes. 16 refs., 11 figs., 1 tab.

Date: September 1, 1987

Creator: Merritt, F. S.; Oreglia, M.; Schellman, H.; Schumm, B. A.; Bachmann, K. T.; Bernstein, R. H. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Solenoid spectrometer magnets

Three solenoid detectors are considered for Isabelle. They are characterized by their diameters of 3, 5, and 8 meters. The size of an experimental hall is then considered, taking into account the likely physics goals, detector and return yoke geometries, thickness of superconducting coils, necessary space for detector repair, etc. Comments and major conclusions are presented. (GHT)

Date: unknown

Creator: Baltay, C.; Danby, G.; Mishina, M.; Wanderer, P. & Willis, W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Estimation of Structural Reliability Under Combined Loads. [PWR; BWR]

For the overall safety evaluation of seismic category I structures subjected to various load combinations, a quantitative measure of the structural reliability in terms of a limit state probability can be conveniently used. For this purpose, the reliability analysis method for dynamic loads, which has recently been developed by the authors, was combined with the existing standard reliability analysis procedure for static and quasi-static loads. The significant parameters that enter into the ana… more

Date: January 1, 1983

Creator: Shinozuka, M.; Kako, T.; Hwang, H.; Brown, P. & Reich, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Development of a Reliability-Analysis Method for Category I Structures. [PWR; BWR]

The present paper develops a reliability analysis method for category I nuclear structures, particularly for reinforced concrete containment structures subjected to various load combinations. The loads considered here include dead loads, accidental internal pressure and earthquake ground acceleration. For mathematical tractability, an earthquake occurrence is assumed to be governed by the Poisson arrival law, while its acceleration history is idealized as a Gaussian vector process of finite dur… more

Date: January 1, 1983

Creator: Shinozuka, M.; Kako, T.; Hwang, H. & Reich, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Search for Inclusive Oscillations of Muon Neutrinos in the Mass Range, 20 <. Delta. M/sup 2/ < 900 Ev/sup 2/

A sensitive search for inclusive neutrino oscillations has been performed using two similar detectors running simultaneously at different locations in the Fermilab dichromatic muon-neutrino beam. The preliminary results show no significant oscillation signal and rule out inclusive oscillations of muon neutrinos into any other type of neutrons for 20 < ..delta..m/sup 2/ < 900 eV/sup 2/ and sin/sup 2/(2 theta) > 0.03 to 0.10.

Date: July 1, 1983

Creator: Haber, C.; Auchincloss, P.; Blair, R.; Ruiz, M.; Sciulli, F.; Shaevitz, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department