Energy generation in convective shells of low mass, low metallicity stars (open access)

Energy generation in convective shells of low mass, low metallicity stars

We report on the non-negligible energy generation from the {sup 13}C neutron source and neutron capture reactions in low mass, low metallicity AGB stars. About 10{sup 4} L{sub {circle dot}} are generated within the thermal pulse convective shell by the combination of the {sup 13}C({alpha}, n){sup 16}O rate and the sum of the Y(Z,A)(n,{gamma})Y(Z,A + 1) reactions and beta decays. The inclusion of this energy source in an AGB thermal pulse evolution is shown to alter the evolution of the convective shell boundaries, and, hence, how the {sup 13}C is ingested into the convective shell. Also, the duration of the pulse itself is reduced by the additional energy input. The nucleosynthetic consequences are discussed for these evolutionary changes. 17 refs., 5 figs.
Date: November 10, 1989
Creator: Bazan, G. (Illinois Univ., Urbana, IL (USA). Dept. of Astronomy) & Lattanzio, J.C. (Lawrence Livermore National Lab., CA (USA))
Object Type: Article
System: The UNT Digital Library
Results of the radiological survey at 9 Branca Court, Lodi, New Jersey (LJ042) (open access)

Results of the radiological survey at 9 Branca Court, Lodi, New Jersey (LJ042)

Maywood Chemical Works (MCW) of Maywood, New Jersey, generated process wastes and residues associated with the production and refining of thorium and thorium compounds from monazite ores from 1916 to 1956. MCW supplied rare earth metals and thorium compounds to the Atomic Energy Commission and various other government agencies from the late 1940s to the mid-1950s. Area residents used the sandlike waste from this thorium extraction process mixed with tea and cocoa leaves as mulch in their yards. Some of these contaminated wastes were also eroded from the site into Lodi Brook. At the request of the US Department of Energy (DOE), a group from Oak Ridge National Laboratory conducts investigative radiological surveys of properties in the vicinity of MCW to determine whether a property is contaminated with radioactive residues, principally {sup 232}Th, derived from the MCW site. The survey typically includes direct measurement of gamma radiation levels and soil sampling for radionuclide analyses. The survey of this site, 9 Branca Court, Lodi, New Jersey (LJ042), was conducted during 1985 and 1986. 4 refs., 7 figs., 3 tabs.
Date: November 1, 1989
Creator: Foley, R.D.; Floyd, L.M. & Carrier, R.F.
Object Type: Report
System: The UNT Digital Library
Establishment and maintenance of a coal sample bank and data base (open access)

Establishment and maintenance of a coal sample bank and data base

For each sample, one 30-gallon drum containing approximately 90 lb of coal at {minus}1/4 inch was designated for headspace oxygen analysis and coal quality monitoring at yearly intervals. Headspace oxygen analysis and retrieval of a 5-lb sample for coal analysis have begun. Headspace oxygen contents are shown in Table 1. Preparation and analysis of these samples for the second yearly quality evaluation is in progress. We have initiated a study of different means of storage in preventing sample deterioration and in maintaining an inert headspace atmosphere. The work was performed with support from the Penn State Cooperative Program in Coal Research. A run-of-mine sample of medium-volatile bituminous Lower Kittanning coal was collected as PSOC-1536 and promptly processed. Gieseler fluidity FSI, alkali extraction and preparation of petrographic pellets were accomplished within 32 hours of extraction of the coal from the mine face. Splits of the sample were sealed under argon in several container types.
Date: November 16, 1989
Creator: Davis, A.
Object Type: Report
System: The UNT Digital Library
Fragmentation properties of jets produced in proton-antiproton collisions at radical S = 1. 8 TeV (open access)

Fragmentation properties of jets produced in proton-antiproton collisions at radical S = 1. 8 TeV

Jet fragmentation properties have been studied in collisions of protons and antiprotons at a center-of-mass energy of 1.8 TeV, using the Collider Detector at Fermilab (CDF). The fractional momentum distribution of charged particles within jets is presented and compared with Monte-Carlo predictions. With increasing di-jet invariant mass from 60 to 200 GeV/c{sup 2} the fragmentation is observed to soften as predicted by scale breaking effects in Quantum Chromodynamics (QCD). The charged multiplicity in the jet core is observed to rise with di-jet invariant mass. 57 refs.
Date: November 1, 1989
Creator: Hubbard, B. (California Univ., Berkeley, CA (USA). Dept. of Physics):(Lawrence Berkeley Lab., CA (USA))
Object Type: Report
System: The UNT Digital Library
A superstring theory underview (open access)

A superstring theory underview

I give a brief survey of the current status of superstring phenomenology, with an emphasis on the (currently unrealized) possibility of obtaining model-independent results. 40 refs., 9 figs.
Date: November 1, 1989
Creator: Dixon, L. J.
Object Type: Article
System: The UNT Digital Library
Profits and progress through least-cost planning (open access)

Profits and progress through least-cost planning

In the broadest sense, this paper discusses issues relating to the earnings implications which flow from the pursuit of least-cost plans. More narrowly, however, the issues, discussion, and conclusions apply with equal force whenever a utility implements cost-effective demand-side measures, whether as part of a least-cost plan or not. To a lesser extent, the paper addresses how these issues relate to many supply-side options, particularly cogeneration and renewable resources. Least-cost planning (LCP) is a process of examining all electricity-saving and electricity-producing options to select a mixture of options that minimizes total consumer cost, often including consideration of environmental concerns and other responsibilities.
Date: November 1, 1989
Creator: Moskovitz, D. (Moskovitz (D.), Alna, ME (United States))
Object Type: Report
System: The UNT Digital Library
Evapotranspiration studies for protective barriers: Experimental plans (open access)

Evapotranspiration studies for protective barriers: Experimental plans

This document describes a general theory and experimental plans for predicting evapotranspiration in support of the Protective Barrier Program. Evapotranspiration is the combined loss of water from plants and soil surfaces to the atmosphere. 45 refs., 1 fig., 4 tabs.
Date: November 1, 1989
Creator: Link, S.O. & Waugh, W.J.
Object Type: Report
System: The UNT Digital Library
LIMB Demonstration Project Extension (open access)

LIMB Demonstration Project Extension

The basic goal of the Limestone Injection Mitigation Burner (LIMB) demonstration is to extend LIMB technology development to a full- scale application on a representative wall-fired utility boiler. The successful retrofit of LIMB to an existing boiler is expected to demonstrate that (a) reductions of 50 percent or greater in SO{sub x} and NO{sub x} emissions can be achieved at a fraction of the cost of add-on FGD systems, (b) boiler reliability, operability, and steam production can be maintained at levels existing prior to LIMB retrofit, and (c) technical difficulties attributable to LIMB operation, such as additional slagging and fouling, changes in ash disposal requirements, and an increased particulate load, can be resolved in a cost-effective manner. The primary fuel to be used will be an Ohio bituminous coal having a nominal sulfur content of 3 percent or greater.
Date: November 15, 1989
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Initial operation and current status of the Fermilab DZero VMEbus-based hardware control and monitor system (open access)

Initial operation and current status of the Fermilab DZero VMEbus-based hardware control and monitor system

DZero is a large colliding beams detector at Fermilab. The control system for this detector includes twenty-five VMEbus-based 68020 computers interconnected using the IEEE-802.5 Token Ring local area network. In operation, the system will monitor about fifteen thousand analog channels and several thousand digital status bits, interfaced to the 68020 computers by the MIL-1553 multiplexed data bus. In addition, the VMEbus control system uses a memory-mapped multi-VMEbus interconnect to download parameters to more than one hundred VMEbus data crates in the experiment. Remote host computers can then read and set memory in the detector crates over the network by accessing memory in the control crates. This is an extremely useful feature during the construction phase, because low level diagnostics and testing of all the detector electronics can be done over the Token Ring network using either IBM-PC compatible computers or the laboratory-wide VAX system. The VMEbus control system hardware is now being installed in the DZero movable counting house. Installation is expected to be complete later this year. 4 refs., 2 figs.
Date: November 1, 1989
Creator: Goodwin, R.; Florian, R.; Johnson, M.; Jones, A. & Shea, M.
Object Type: Article
System: The UNT Digital Library
Results of the Radiological Survey at 83 Belle Avenue, Maywood, New Jersey (MJ047) (open access)

Results of the Radiological Survey at 83 Belle Avenue, Maywood, New Jersey (MJ047)

Maywood Chemical Works (MCW) of Maywood, New Jersey, generated process wastes and residues associated with the production and refining of thorium and thorium compounds from monazite ores from 1916 to 1956. MCW supplied rare earth metals and thorium compounds to the Atomic Energy Commission and various other government agencies from the late 1940s to the mid-1950s. Area residents used the sandlike waste from this thorium extraction process mixed with tea and cocoa leaves as mulch in their yards. Some of these contaminated wastes were also eroded from the site into Lodi Brook. At the request of the US Department of Energy (DOE), a group from Oak Ridge National Laboratory conducts investigative radiological surveys of properties in the vicinity of MCW to determine whether a property is contaminated with radioactive residues, principally {sup 232}Th, derived from the MCW site. The survey typically includes direct measurement of gamma radiation levels and soil sampling for radionuclide analyses. The survey of this site, 83 Belle Avenue, Maywood, New Jersey (MJ047), was conducted during 1988. 5 refs., 2 figs., 3 tabs.
Date: November 1, 1989
Creator: Foley, R. D. & Floyd, L. M.
Object Type: Report
System: The UNT Digital Library
A perspective on lepton-photon physics (open access)

A perspective on lepton-photon physics

This paper reviews some key experiments of the past in which the same basic physical processes are attacked both through lepton-photon interaction and by using hadron machines as primary tools. Not surprisingly, it is concluded that the basic distinction between lepton-photon physics and elementary particle physics in general is unreal but that the tools and methodology can be very different indeed. A look is then taken into the expected future evolution of particle accelerators. Existing accelerator technologies both for proton and electron colliders are approaching basic limits as the collision energy in the constituent frame is raised. At this time no clear path exists for electron-positron colliders to compete with the SSC as far as energy reach is concerned, but the superior clarity and coverage of phenomena not accessible to hadron colliders makes it absolutely essential that the development of both electron-positron and hadron colliders be pursued vigorously. It is concluded that accelerator R D effort underway is insufficient if a large hiatus in productivity in particle physics is to be avoided. Electron-positron linear colliders are the most promising approach for the extension of knowledge beyond LEP and beyond the SSC, but the difficulties to reach an electron-positron energy of …
Date: November 1, 1989
Creator: Panofsky, W.K.H.
Object Type: Article
System: The UNT Digital Library
Production of the f sub 0 (975) meson in J/. Psi. decays (open access)

Production of the f sub 0 (975) meson in J/. Psi. decays

Preliminary results on the production and decay of the f{sub 0}(975) meson in the processes J/{Psi} {yields} {phi}{pi}{sup +}{pi}{sup -}, J/{Psi} {yields} {phi}{pi}{sup 0}{pi}{sup 0}, J/{Psi} {yields} {phi}K{sup +}K{sup -}, and J/{Psi} {yields} {omega}{pi}{sup +}{pi}{sup -} are reported on. The data sample, corresponding to 5.8 {times} 10{sup 6} produced J/{Psi}'s, were collected with the MARK-III detector at SPEAR. In a coupled- channel fit to the invariant mass distribution of the {pi}{sup +}{pi}{sup -} system opposite the {phi}, the f{sub 0}(975) product branching ratios, resonance parameters and couplings to K{sup +}K{sup -} and {pi}{sup +}{pi}{sup -} are extracted. An upper limit on f{sub 0}(975) production in conjunction with an {omega} is presented. 15 refs., 4 figs., 4 tabs.
Date: November 1, 1989
Creator: Lockman, W.S.
Object Type: Article
System: The UNT Digital Library
Anisotropic yielding of rocks at high temperatures and pressures; Annual Progress Report, 1988-1989 (open access)

Anisotropic yielding of rocks at high temperatures and pressures; Annual Progress Report, 1988-1989

The experimental results we have obtained on Four-Mile gneiss have demonstrated that the yield behavior of quartzo-feldspathic rocks containing only a small percentage (10%) of mica can be markedly anisotropic, provided the mica minerals exhibit a strong crystallographic preferred orientation. Samples of gneiss oriented such that resolved shear stresses on the foliation plane are large are considerably weaker than granites of similar grain size and composition, and this weakness is attributed to enhanced nucleation of microcracks in quartz and feldspar adjacent to mica grains that are suitably oriented for slip. We expect the yield behavior of rocks containing a higher proportion of phyllosilicates to be influenced by the strongly anisotropic nature of these minerals as well, although the strengths, temperature and pressure dependencies, and flow-controlling mechanisms in such rocks may be significantly different.
Date: November 30, 1989
Creator: Kronenberg, A. K.; Russell, J. E. & Carter, N. L.
Object Type: Report
System: The UNT Digital Library
Results of the radiological survey at 146 W. Central Avenue, Maywood, New Jersey (MJ034) (open access)

Results of the radiological survey at 146 W. Central Avenue, Maywood, New Jersey (MJ034)

Maywood Chemical Works (MCW) of Maywood, New Jersey, generated process wastes and residues associated with the production and reining of thorium and thorium compounds from monazite ores from 1916 to 1956. MCW supplied rare earth metals and thorium compounds to the Atomic Energy Commission and various other government agencies from the late 1940s to the mid-1950s. Area residents used the sandlike waste from this thorium extraction process mixed with tea and cocoa leaves as mulch in their yards. Some of these contaminated wastes were also eroded from the site into Lodi Brook. At the request of the US Department of Energy (DOE), a group from OaK Ridge National Laboratory conducts investigative radiological surveys of properties in the vicinity of MCW to determine whether a property is contaminated with radioactive residues, principally {sup 232}Th, derived from the MCW site. These surveys typically include direct measurement of gamma radiation levels and soil sampling for radionuclide analyses. The survey of this site, a private property at 146 West Central Avenue, Maywood, New Jersey (MJ034), was conducted during 1987 and 1988. While some measurements at this property were greater than background levels typically encountered in the New jersey area, no radiation levels nor radionuclide …
Date: November 1, 1989
Creator: Foley, R.D. & Carrier, R.F.
Object Type: Report
System: The UNT Digital Library
Electroformation of Uranium Hemispherical Shells (open access)

Electroformation of Uranium Hemispherical Shells

This effort was directed at developing an electrochemical process for forming uniform and dendrite-free deposits of uranium from molten salts. This process is to be used for the electroformation of free-standing hemispherical shells of uranium for nuclear applications.
Date: November 1989
Creator: Marshall, S. L.; Redey, L.; Vandegrift, G. F. & Vissers, D. R.
Object Type: Report
System: The UNT Digital Library
A Systematic Analysis of the Spectra of Trivalent Actinide Chlorides in D3h Site Symmetry (open access)

A Systematic Analysis of the Spectra of Trivalent Actinide Chlorides in D3h Site Symmetry

The optical spectra of actinide ions in the compound AnCl₃ and doped into single crystal LaCl₃ were interpreted in terms of transitions within 5f{sup N} configurations. Energy-level calculations were carried out using an effective operator Hamiltonian, the parameters of which were determined by fitting experimental data. Atomic and crystal-field matrices were diagonalized simultaneously assuming an approximate D{sub 3h} site symmetry. The spectroscopic data were taken from the literature but in most cases supplemented by unpublished measurements in absorption and in fluorescence. Spectroscopic data for each ion were analyzed independently, then the model parameters were intercompared and in many cases adjusted such that in the final fitting process the principal interactions showed uniform trends in parameter values with increasing atomic number. Consistent with analyses of the spectra of lanthanide ions in both LaCl₃ and LaF₃, abrupt changes in magnitude of certain crystal-field parameters were found near the center of the 5f{sup N}-series. This resulted in two groups of parameter values, but with consistent trends for both halves of the series, and generally very good agreement between observed and computed energies. A new energy level chart based on computed crystal-field level energies for each trivalent actinide ion has been prepared. in addition, …
Date: November 1989
Creator: Carnall, W. T.
Object Type: Report
System: The UNT Digital Library
PC-DYMAC: Personal Computer - DYnamic Materials ACcounting (open access)

PC-DYMAC: Personal Computer - DYnamic Materials ACcounting

This manual was designed to provide complete documentation for the computer system used by the EBR-II Fuels and Materials Department, Argonne National Laboratory-West (ANL-W) for accountability of special nuclear materials (SNM). This document includes background information on the operation of the Fuel Manufacturing Facility (FMF), instructions on computer operations in correlation with production and a detailed manual for DYMAC operation. 60 figs.
Date: November 1989
Creator: Jackson, B. Gail
Object Type: Report
System: The UNT Digital Library
Use of amine oxide surfactants for chemical flooding EOR (enhanced oil recovery) (open access)

Use of amine oxide surfactants for chemical flooding EOR (enhanced oil recovery)

The use of amine oxides with and without alcohols as cosolvents, and in combination with other surfactants as mixed micellar formulations for enhanced oil recovery by surfactant flooding was investigated. Amine oxides are a salt-tolerant class of surfactants that produce low interfacial tension and can develop viscosity without the addition of polymers. These salt-tolerant formulations generate three-phase regions with hydrocarbons over a broad salinity range, develop moderate solubilization, and produce low interfacial tensions, however oil recovery from amine oxide-alcohol phase behavior optimized formulations was directly dependent upon the quantity of surfactant injected. The large pore volume and high concentration of surfactant required prohibits their economic use as the primary surfactant in chemical flooding EOR. Dimethylalkylamine oxides are useful as cosurfactants and viscosifiers in formulations with other surfactants for chemical flooding EOR but the use of ethoxylated and propoxylated amine oxides should be avoided due to the decomposition of these amine oxides under reservoir conditions. Phase behavior, phase inversion temperatures, and viscosity scans have been correlated with surfactant structures to provide a guide for amine oxide applications in chemical flooding. 36 refs., 5 figs., 6 tabs.
Date: November 1, 1989
Creator: Olsen, D.K.
Object Type: Report
System: The UNT Digital Library
The earth-coupled heat pump: Utilizing innovative technology in single family rehabilitation strategies (open access)

The earth-coupled heat pump: Utilizing innovative technology in single family rehabilitation strategies

The study examines the feasibility of incorporating the use of earth-coupled heat pump technology in single-family housing rehabilitation projects, based on energy conservation attributes and financial considerations. Following evaluation of a theoretical model which indicated that installations of the heat pumps were feasible, the heat pumps were tested under actual conditions in five single family housing units which were part of the Urban Homesteading Program, and were matched with comparable units which did not receive special treatment. Energy consumption information was collected for all units for twelve months. Variables were identified, and the data was analyzed for individual housing units and compared with the results predicted by the theoretical model to determine the practicality of incorporating such technology in large scale rehabilitation projects. 14 refs., 14 figs., 3 tabs.
Date: November 1, 1989
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Gamma and beta logging of underground sewer and process lines (open access)

Gamma and beta logging of underground sewer and process lines

The GammaSnake can be useful for locating uranium mill tailings used as backfill for sewer lines or storm drains where the lines can be readily accessed from a cleanout access port or other opening. The time required to determine if contamination is present using the GammaSnake method is considerably less than when using the delta gamma or drilling methods. There is, also, less potential hazard to the equipment operators when using the GammaSnake method. The GammaSnake method is generally limited to a distance of 100 feet or less. Used with the MAC-51B line locator, the GammaSnake method can provide useful information without extensive drilling or surveying. 7 figs., 2 tabs.
Date: November 1, 1989
Creator: Rangel, M.J.; Martz, D.E. & Langner, G.H. Jr.
Object Type: Report
System: The UNT Digital Library
Ocean Thermal Energy Conversion: An overview (open access)

Ocean Thermal Energy Conversion: An overview

Ocean thermal energy conversion, or OTEC is a technology that extracts power from the ocean's natural thermal gradient. This technology is being pursued by researchers from many nations; in the United States, OTEC research is funded by the US Department of Energy's Ocean Energy Technology program. The program's goal is to develop the technology so that industry can make a competent assessment of its potential -- either as an alternative or as a supplement to conventional energy sources. Federally funded research in components and systems will help OTEC to the threshold of commercialization. This publication provides an overview of the OTEC technology. 47 refs., 25 figs.
Date: November 1, 1989
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Near-surface sputtered particle transport for an oblique incidence magnetic field plasma (open access)

Near-surface sputtered particle transport for an oblique incidence magnetic field plasma

Near-surface sputtered particle transport has been analyzed numerically using models of sputtering, sheath parameters, and impurity collisions with a background D-T plasma. Tungsten and carbon sputtering was examined, for tokamak divertor plasma conditions. Redeposited ion parameters computed include the charge state, transit time, energy and angle of incidence. A regime of operation for finite self-sputtering of tungsten has been identified. This regime is broader than previous estimates. Results for energetically sputtered and thermally sputtered carbon are compared. 18 refs., 9 figs., 1 tab.
Date: November 1, 1989
Creator: Brooks, J. N.
Object Type: Report
System: The UNT Digital Library
Cryosorption of helium on argon frost TFTR (Tokamak Fusion Test Reactor) neutral beamlines (open access)

Cryosorption of helium on argon frost TFTR (Tokamak Fusion Test Reactor) neutral beamlines

Helium pumping on argon frost has been investigated on TFTR neutral beam injectors and shown to be viable for limited helium beam operation. Maximum pumping speeds are {approximately} 25% less than those measured for pumping of deuterium. Helium pumping efficiency is low, > 20 argon atoms are required to pump each helium atom. Adsorption isotherms are exponential and exhibit a two-fold increase in adsorption capacity as the cryopanel temperature is reduced from 4.3 K to 3.7 K. Pumping speed was found to be independent of cryopanel temperature over the temperature range studied. After pumping a total of 2000 torr-l of helium, the beamline base pressure rose to 2{times}10{sup -5} torr from an initial value of 10{sup -8} torr. Accompanying this three order of magnitude increase in pressure was a modest 40% decrease in pumping speed. The introduction of 168 torr-l of deuterium prior to helium injection reduced the pumping speed by a factor of two with no decrease in adsorption capacity. 29 refs., 7 figs.
Date: November 1, 1989
Creator: Kamperschroer, J. H.; Cropper, M. B.; Dylla, H. F.; Garzotto, V.; Dudek, L. E.; Grisham, L. R. et al.
Object Type: Report
System: The UNT Digital Library
Status of glueball mass calculations in lattice gauge theory (open access)

Status of glueball mass calculations in lattice gauge theory

The status of glueball spectrum calculations in lattice gauge theory is briefly reviewed, with focus on the comparison between Monte Carlo simulations and small-volume analytical calculations in SU(3). The agreement gives confidence that the large-volume Monte Carlo results are accurate, at least in the context of the pure gauge theory. An overview of some of the technical questions, which is aimed at non-experts, serves as an introduction. 19 refs., 1 fig.
Date: November 1, 1989
Creator: Kronfeld, A.S.
Object Type: Article
System: The UNT Digital Library