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in subjects: "Nonmetals"

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A 1. 5--4 Kelvin detachable cold-sample transfer system: Application to inertially confined fusion with spin-polarized hydrogens fuels

A compact cold-transfer apparatus for engaging and retrieving samples at liquid helium temperatures (1.5--4K), maintaining the samples at such temperatures for periods of hours, and subsequently inserting them in diverse apparatuses followed by disengagement, is described. The properties of several thermal radiation-insulating shrouds, necessary for very low sample temperatures, are presented. The immediate intended application is transportable target-shells containing highly spin-polarized deu… more

Date: January 1, 1990

Creator: Alexander, N.; Barden, J.; Fan, Q. & Honig, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

1/12-scale physical modeling experiments in support of tank 241-SY- 101 hydrogen mitigation

Hanford tank 241-SY-101 is a 75-ft-dia double-shell tank that contains approximately 1.1 M gal of radioactive fuel reprocessing waste. Core samples have shown that the tank contents are separated into two main layers, a article laden supernatant liquid at the top of the tank and a more dense slurry on the bottom. Two additional layers may be present, one being a potentially thick sludge lying beneath the slurry at the bottom of the tank and the other being the crust that has formed on the surfa… more

Date: January 1, 1993

Creator: Fort, J. A.; Bamberger, J. A.; Bates, J. M.; Enderlin, C. W. & Elmore, M. R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A = 4 0/sup +/ - 1/sup +/ binding-energy difference

The A = 4 ..lambda..-hypernuclei provide a rich source of information about the s-wave properties of the fundamental hyperon-nucleon (YN) force as well as offer a unique opportunity to investigate the complications that arise in calculations of the properties of bound systems in which one baryon (here the ..lambda..) with a given isospin couples strongly to another (the ..sigma..) with a different isospin. The ..lambda../sup 4/H - ..lambda../sup 4/He isodoublet ground-state energies are not con… more

Date: January 1, 1982

Creator: Gibson, B. F. & Lehman, D. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

30-MJ superconducting magnetic energy storage for BPA transmission-line stabilizer

The Bonneville Power Administration operates the transmission system that joins the Pacific Northwest and southern California. A 30 MJ (8.4 kWh) superconducting Magnetic Energy Storage (SMES) unit with a 10 MW converter can provide system damping for low frequency oscillations. The unit is scheduled to operate in late 1982. Progress to date is described. The coil is complete. All major components of the electrical and cryogenic systems have been received and testing has begun. Computer control … more

Date: January 1, 1981

Creator: Schermer, R.I.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

300-Element Silicon-Lithium Position-Sensitive Imaging Detector for Angiography

Silicon lithium-drifted (Si(Li)) detectors 150 mm long, 10 mm wide and 5 mm thick with 300 individual elements have been fabricated as imaging detectors for noninvasive studies of human coronary arteries using 33 keV x-rays from a synchrotron radiation beamline. This detector is an extension of earlier work on 30 mm long devices with initially 30 and later 60 elements. The detector fabrication details are discussed highlighting problems in uniform lithium-ion compensation. The device structure … more

Date: October 1, 1985

Creator: Walton, J. T.; Sommer, H. A.; Thompson, A. C.; Hughes, E. B. & Zeman, H. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

300-MHz optical discriminator-counter

The prediction of future CO/sub 2/ content in the atmosphere is not completely credible because the oceanographers and terrestrial ecologists do not agree on the global CO/sub 2/ balance. Very precise measurements of O/sub 2//N/sub 2/ ratio using Raman scattering over a few years' period could provide important information and lead to the explanation of the disparity in the atmospheric CO/sub 2/ balance. An optical discriminator-counter has been developed to count closely spaced optical events … more

Date: July 1, 1981

Creator: Turko, B. & Lo, C.C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

650 mm long liquid hydrogen target for use in a high intensity electron beam

This paper describes a 650 mm long liquid hydrogen targetr constructed for use in the high intensity electron beam at the Stanford Linear Accelerator Center (SLAC). The main design problem was to construct a target that would permit the heat deposited by the electron beam to be removed rapidly without boiling the hydrogen so as to maintain constant target density for optimum data taking. Design requirements, cosntruction details and operating experience are discussed.

Date: February 1, 1984

Creator: Mark, J.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

650 mm long liquid hydrogen target for use in a high intensity electron beam

This paper describes a 650 mm long liquid hydrogen target constructed for use in the high intensity electron beam at the Stanford Linear Accelerator Center. The main design problem was to construct a target that would permit the heat deposited by the electron beam to be removed rapidly without boiling the hydrogen so as to maintain constant target density for optimum data taking. Design requirements, construction details and operating experience are discussed.

Date: July 1, 1983

Creator: Mark, J.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

17th DOE nuclear air cleaning conference: proceedings. Volume 2

Volume 2 contains papers presented at the following sessions: adsorption; noble gas treatment; personnel education and training; filtration and filter testing; measurement and instrumentation; air cleaning equipment response to accident related stress; containment venting air cleaning; and an open end session. Twenty-eight papers were indexed separately for inclusion in the Energy Data Base. Ten papers had been entered earlier.

Date: February 1, 1983

Creator: First, M.W. (ed.)

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

1985 environmental monitoring report

The environmental monitoring program is designed to determine that BNL facilities operate such that the applicable environmental standards and effluent control requirements have been met. The data were evaluated using the appropriate environmental regulatory criteria. The environmental levels of radioactivity and other pollutants found in the vicinity of BNL during 1985 are summarized in this report. Detailed data are not included in the main body of the report, but are tabulated and presented … more

Date: April 1, 1986

Creator: Day, L.E.; Miltenberger, R.P. & Naidu, J.R. (eds.)

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

1986 annual information meeting. Abstracts

Abstracts are presented for the following papers: Geohydrological Research at the Y-12 Plant (C.S. Haase); Ecological Impacts of Waste Disposal Operations in Bear Creek Valley Near the Y-12 Plant (J.M. Loar); Finite Element Simulation of Subsurface Contaminant Transport: Logistic Difficulties in Handling Large Field Problems (G.T. Yeh); Dynamic Compaction of a Radioactive Waste Burial Trench (B.P. Spalding); Comparative Evaluation of Potential Sites for a High-Level Radioactive Waste Repository… more

Date: January 1, 1986

Item Type: Article

Partner: UNT Libraries Government Documents Department

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1986 wet deposition temporal and spatial patterns in North America

The focus of this report is on North American wet deposition temporal patterns from 1979 to 1986 and spatial patterns for 1986. The report provides statistical distribution summaries of annual precipitation-weighted average concentration and annual deposition for nine ion species: hydrogen, sulfate, nitrate, ammonium, calcium, chloride, sodium, potassium, and magnesium. The data in the report are from the Acid Depositing System (ADS) for the statistical reporting of North American deposition da… more

Date: July 1, 1989

Creator: Olsen, A.R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

1988 Wet Deposition Temporal and Spatial Patterns in North America

The focus of this report is on North American wet deposition temporal patterns from 1979 to 1988 and spatial patterns for 1988. It is the third in a series of reports that investigate the patterns of annual precipitation-weighted average concentration and annual deposition for nine ion species: hydrogen, sulfate, nitrate, ammonium, calcium, chloride, sodium, potassium, and magnesium. Mosaic maps, based on surface estimation using kriging, display concentration and deposition spatial patterns of… more

Date: March 1, 1992

Creator: Simpson, J. C.; Olsen, A. R. & Bittner, E. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

5cm aperture dipole studies

The results obtained during the evolution of the design, construction, and testing program of the design ''B'' dipole are presented here. Design ''B'' is one of the original three competing designs for the Superconducting Super Collider ''SSC'' arc dipoles. The final design parameters were as follows: air cored (less than a few percent of the magnetic field derived from any iron present), aluminum collared, two layered winding, 5.5T maximum operating field, and a 5 cm cold aperture. There have … more

Date: September 30, 1986

Creator: McInturff, A.D.; Bossert, R.; Carson, J.; Fisk, H.E.; Hanft, R.; Kuchnir, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Ab initio effective core potentials including relativistic effects and their application to the electronic structure calculations of heavy atoms and molecules

The effects of the 4f shell of electrons and the relativity of valence electrons are compared. The effect of 4f shell (lanthanide contraction) is estimated from the numerical Hartree-Fock (HF) calculations of pseudo-atoms corresponding to Hf, Re, Au, Hg, Tl, Pb and Bi without 4f electrons and with atomic numbers reduced by 14. The relativistic effect estimated from the numerical Dirac-Hartree-Fock (DHF) calculations of those atoms is comparable in the magnitude with that of the 4f shell of elec… more

Date: November 1, 1977

Creator: Lee, Y. S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Ab initio potential surface calculations for the H + H₂O and H + HF hydrogen atom exchange reactions

The calculations reveal that the H + H/sub 2/O and H + HF exchange reactions are both characterized by a large energy barrier (on the order of 20 to 30 kcal/mole) and a transition state possessing significant Rydberg 3s character on the central atom. The presence of high energy barriers means that both exchange reactions will be extremely slow except at very high temperatures.

Date: January 1, 1976

Creator: Wadt, W. R. & Winter, N. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Absence of molecular deuterium dissociation during room-temperature permeation into polystyrene ICF target shells

Polystyrene microshells filled with deuterium and tritium gas are important target shells for inertially confined fusion (ICF) and are particularly promising for target containing spin-polarized hydrogens fuels. A currently active approach to the latter uses polarized D in HD, in a method which requires preservation of the high purity of the initially prepared HD (very low specified H{sub 2} and D{sub 2} concentrations). This would not be possible if dissociation should occur during permeation … more

Date: January 1, 1991

Creator: Honig, A.; Alexander, N.; Fan, Q.; Gram, R. & Kim, H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Absolute rate measurements of two-photon process of gases, liquids, and solids

Due to rapid improvements in high-power laser performance, two-photon absorption processes have become a very useful tool for studying the molecular structures of various gases, liquids and solids. However, measurements of absolute two-photon absorption cross sections were more or less ignored previously because of their small size. In this work, we obtained not only the two-photon absorption spectra, but also measurements of their absolute cross sections for various gases, liquids, and solids.… more

Date: December 1, 1987

Creator: Chen, C.H.; McCann, M.P. & Payne, M.G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Absorption experiments on electorn-beam pumped rare gases

Absorption experiments have been performed on electron-beam pumped rare gases (argon and krypton) as a function of pump power using the frequency-doubled output of a tunable dye laser at 248.4 nm and 257.3 nm. Energy deposition into the gas was varied by attenuating the electron beam with one or two stainless steel screens and by filling the gas chamber with different rare gas densities. The results from two energy deposition diagnostics were compared, and found to agree within 20%. Kinetics co… more

Date: January 1, 1989

Creator: McCown, A. W.; Rose, E. A.; Krohn, B. J.; Hanson, D. E. & Czuchlewski, S. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Absorption of ion Bernstein waves by impurity cyclotron harmonics

This paper analyzes the damping of externally-launched ion Bernstein waves by absorption at the cyclotron harmonics of the impurity ions. The inclusion of the non-magnetic energy flux term reduces the damping rate by nearly two orders of magnitude from the previous calculation. Excessive impurity damping can be avoided by launching ion Bernstein waves at a frequency just below the second (or higher) cyclotron harmonic of hydrogen.

Date: May 1, 1982

Creator: Ono, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Absorption spectrophotometric characterization of Sm(II), Sm(III), and Sm(II/III) bromides and Sm(III) oxybromide in the solid state

Absorption spectra obtained from SmBr/sub 3/, SmBr/sub 2/, and Sm0Br were used in identifying the samarium species in several mixed-valence Sm(II/III) compounds produced by H/sub 2/ reduction of SmBr/sub 3/. The nature of the absorption of Sm0Br made it possible to detect even traces of Sm0Br in the Sm bromides.

Date: June 15, 1981

Creator: Wood, A. B.; Young, J. P.; Peterson, J. R. & Haschke, J. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

AC microcalorimetry of adsorbates on evaporated metal films: Orientational ordering of H₂ multilayers

We have improved and extended a novel ac calorimetric technique for measuring the heat capacity of adsorbates on evaporated metal films. Metallic substrates are of particular interest in current studies of the thermodynamics of adsorbed molecules. The method described in the present work is only calorimetric technique which allows measurements of molecules on simple metallic surfaces. Among other improvements, we have achieved significant progress in the preparation and characterization of the … more

Date: November 1, 1991

Creator: Phelps, R.B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Accelerator-driven sub-critical target concept for transmutation of nuclear wastes

A means of transmuting key long-lived nuclear wastes, primarily the minor actinides (Np, Am, Cm) and iodine, using a hybrid proton accelerator and sub-critical lattice, is proposed. By partitioning the components of the light water reactor (LWR) spent fuel and by transmuting key elements, such as the plutonium, the minor actinides, and a few of the long-lived fission products, some of the most significant challenges in building a waste repository can be substantially reduced. The proposed machi… more

Date: January 1, 1991

Creator: Van Tuyle, G. J.; Todosow, M.; Aronson, A. L.; Takahashi, H. (Brookhaven National Lab., Upton, NY (United States)) & Geiger, M. J. (Military Academy, West Point, NY (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Accelerator for the production of tritium (APT)

A collaborative study by Los Alamos and Brookhaven National Laboratories, supported by the Westinghouse Hanford Company, investigating a facility to produce tritium for the nation's defense needs indicates that a 1.6-GeV, 250-mA proton accelerator is required. A reference design of this accelerator starts with two parallel 125-keV injectors feeding 350-MHz radio-frequency quadrupoles (RFQ) that funnel at 2.5 MeV into a 700-MHz drift-tube linac (DTL). The DTL injects at 100 MeV into a 1400-MHz s… more

Date: January 1, 1989

Creator: Wilson, M. T.; Bhatia, T. S.; Guy, F. W.; Neuschaefer, G. H.; Wangler, T. P. & Young, L. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department