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24
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Results:
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3-body final states in peripheral heavy-ion collisions: nuclear clustering structure and projectile excitation revisited
Even though peripheral heavy-ion collisions are less violent than their central counterparts, the large energy exchange between the reactants often leaves the primary products in excited particle-unstable states whose subsequent decay leads to 3 or more nuclei emerging in the final exit channel. These post-reaction, predominantly sequential de-excitation processes can sometimes provide interesting structural information about the parent nuclei. In fact, provided these processes are well understood, one can employ them as probes for studying initial properties of the fragments. This report discusses results of two experiments that deal with (1) nonstatistical, rare decay modes of the projectile, and (2) internal excitation energy of the projectile- and target-like fragments in peripheral collisions. The physics addressed in each is different, but the experimental and data-analysis techniques are so similar that it is relevant to join them together.
Date:
February 1, 1986
Creator:
Chan, Y.; Chavez, E.; Gazes, S.B.; Kamermans, R.; Schmidt, H.R.; Siwek-Wilczynska, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Intermediate mass fragment emission from 8 to 40 MeV/u
Experimental data for fragmentation in the reactions /sup 93/Nb = /sup 9/Be, /sup 12/C, and /sup 27/Al are presented. Data were obtained from the LBL BEVALAC (25 to 40 MeV/u), GSI Unilac (11 to 18 MeV/u) and LBL SuperHILAC. These measurements imply, that over a large range of bombarding energies, intermediate mass fragments are produced by the bineary decay of a compound nucleus-like system. At low bombarding energies, these systems are associated with a complete fusion reaction, whereas for the larger energies the initial system is formed in an incomplete fusion reaction. The data shows a smooth evolution from the lower energies, where the statistical emission of intermediate mass fragments is well established, to the higher, intermediate energy regime. 4 refs., 2 figs.
Date:
February 1, 1986
Creator:
Charity, R. J.; McMahan, M. A.; Bowman, D. R.; Liu, Z. H.; McDonald, R. J.; Wozniak, G. J. et al.
Object Type:
Article
System:
The UNT Digital Library
Bio-leaching of toxic metals from geothermal waste. A preliminary engineering analysis
The feasibility of a biological facility to treat geothermal sludge from a base case 50-MW double-flash geothermal power plant in the Imperial Valley, California was evaluated. The effect of sludge and nutrient concentration, agitation air bubbling and sterility on the rate of metal solubilization by the bacteria Thiobacillus thiooxidans and ferrooxidans was examined. All experiments were performed in batch flasks and monitored daily for bacterial growth. T. Thiooxidans leached 36% of the zinc in the sludge after 288 hr but leached little chromium. T. ferrooxidans removed 60% of the chromium in the sludge after 250 hr but did not leach zinc. Sludge to medium ratios of greater than 10% were toxic to the microorganisms studied. the experimental results were used to design a biological solid-waste treatment plant. The design basis used was 5 wt % sludge in the leaching vessel with a residence time of 10 days. The non-regulated waste resulting from the treatment plant could be used for land fill or construction materials. The total capital cost for the bio-leaching plant is $3.3 million with an annual operating cost of $690,000. The total cost of this plant is about 0.2 cents/kWh of electricity produced, which is essentially the same …
Date:
February 1, 1986
Creator:
Dobryn, D. G.; Brisson, A. L.; Lee, C. M. & Roll, S. M.
Object Type:
Report
System:
The UNT Digital Library
Yakima River Spring Chinook Enhancement Study, 1985 Annual Report.
The purpose was to evaluate enhancement methodologies that can be used to rebuild runs of spring chinook salmon in the Yakima River basin. The objectives were to: (1) determine the abundance, distribution and survival of naturally produced fry and smolts in the Yakima River; (2) evaluate different methods of fry and smolt supplementation into the natural rearing environment while maintaining as much as possible the gentic integrity of naturally produced stocks; (3) locate and define areas in the watershed which may be used for the rearing of spring chinook; (4) define strategies for enhancing natural production of spring chinook in the Yakima River; and (5) determine physical and biological limitations for production within the system.
Date:
February 1, 1986
Creator:
Fast, David E.
Object Type:
Report
System:
The UNT Digital Library
Low cost hydrogen/novel membrane technology for hydrogen separation from synthesis gas
To make the coal-to-hydrogen route economically attractive, improvements are being sought in each step of the process: coal gasification, water-carbon monoxide shift reaction, and hydrogen separation. This report addresses the use of membranes in the hydrogen separation step. The separation of hydrogen from synthesis gas is a major cost element in the manufacture of hydrogen from coal. Separation by membranes is an attractive, new, and still largely unexplored approach to the problem. Membrane processes are inherently simple and efficient and often have lower capital and operating costs than conventional processes. In this report current ad future trends in hydrogen production and use are first summarized. Methods of producing hydrogen from coal are then discussed, with particular emphasis on the Texaco entrained flow gasifier and on current methods of separating hydrogen from this gas stream. The potential for membrane separations in the process is then examined. In particular, the use of membranes for H{sub 2}/CO{sub 2}, H{sub 2}/CO, and H{sub 2}/N{sub 2} separations is discussed. 43 refs., 14 figs., 6 tabs.
Date:
February 1, 1986
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Reduced waste generation, FY 1986
The United States Department of Energy is committed to the principles of minimizing the quantity and transuranic content of its transuranium (TRU) waste being generated at its nuclear facilities. The reasons are to reduce costs associated with waste handling and disposal, and also to reduce radiation exposure to workers and risk for radionuclide release to man and the environment. The purpose of this document is to provide the USDOE with a plan of research and development tasks for waste minimization, and is prepared so as to provide the maximum impact on volumes based on cost/benefit factors. The document is to be updated annually or as needed to reflect current and future tasks. The Reduced Waste Generation (RWG) tasks encompass a wide range of activities with the principal goals of (1) preventing the generation of waste and (2) converting TRU waste into low-level wastes (LLW) by sorting or decontamination. Concepts for reducing the volume such as in incineration and compaction are considered within the discipline of Reduced Waste Generation, but are considered as somewhat developed technology with only a need for implementation. 33 refs.
Date:
February 1, 1986
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
An Alternative Library Under 4. 2 BSD UNIX on a VAX 11/780
This paper describes an alternative library of elementary functions prepared for use with the standard Fortran compiler under 4.2 BSD UNIX on a VAX 11/780. The library, written in C and based on the book ''Software Manual for the Elementary Functions'' by Cody and Waite, offers improved accuracy over the standard system library, as well as additional capabilities. Listings and output from the ELEFUNT suite of test programs are included in the appendix.
Date:
February 1986
Creator:
Cody, William James
Object Type:
Report
System:
The UNT Digital Library
Analysis of Heat-Pipe Absorbers in Evacuated-Tube Solar Collectors
Heat transfer in evacuated-tube solar collectors with heat-pipe absorbers is compared with that for similar collectors with flow-through absorbers. In systems that produce hot water or other heated fluids, the heat-pipe absorber suffers a heat transfer penalty compared with the flow-through absorber, but in many cases the penalty can be minimized by proper design at the heat-pipe condenser and system manifold. The heat transfer penalty decreases with decreasing collector heat loss coefficient, suggesting that evacuated tubes with optical concentration are more appropriate for use with heat pipes than evacuated or non-evacuated flat-plate collectors. When the solar collector is used to drive an absorption chiller, the heat-pipe absorber has better heat transfer characteristics than the flow-through absorbers.
Date:
February 1986
Creator:
Hull, John R.; Schertz, William W. & Allen, John W.
Object Type:
Report
System:
The UNT Digital Library
Heat Extraction from the ANL Research Salt Gradient Solar Pond
This report documents the design considerations and test results of two heat extraction systems for the ANL Research Salt Gradient Solar Pond (RSGSP). Since operation began in November 1980, the RSGSP has been used to study a wide variety of solar pond phenomena, and the behavior of the RSGSP without heat extraction has been well characterized. Heat extraction equipment was installed in the spring of 1984, with heat extraction experiments conducted the following summer and fall and in the fall of 1985. The experiments simulated the use of the solar pond for grain drying. The effects of both heat extraction methods on the stability of the salt gradient are investigated.
Date:
February 1986
Creator:
Hull, John R.; Scranton, A. B.; Mehta, J. M.; Cho, S. H. & Kasza, Kenneth Edmund
Object Type:
Report
System:
The UNT Digital Library
The Reaction of Glass During Gamma Irradiation in a Saturated Tuff Environment: Part 1, SRL 165 Glass
The influence of gamma irradiation on the reaction of actinide-doped borosilicate glass (SRL 165) in a saturated tuff environment has been studied in a series of tests lasting up to 56 days. The following conclusions were reached. The reaction of, and subsequent actinide release from, the glass depends on the dynamic interaction between radiolysis effects, which cause the solution pH to become more acidic; glass reaction, which drives the pH more basic; and test component interactions that may extract glass components from solution. The use of large gamma irradiation dose rates to accelerate reactions that may occur in an actual repository radiation field may affect this dynamic balance by unduly influencing the mechanism of the glass-water reaction. Comparisons between the present results and data obtained by reacting similar glasses using MCC-1 and NNWSI rock cup procedures indicate that the irradiation conditions used in the present experiments do not dramatically influence the reaction rate of the glass.
Date:
February 1986
Creator:
Bates, John K.; Fischer, Donald F. & Gerding, Thomas J.
Object Type:
Report
System:
The UNT Digital Library
Transforming Fortran DO Loops to Improve Performance on Vector Architectures
The performance of programs executing on vector computers is significantly improved when the number of accesses to memory can be reduced. Unrolling Fortran DO loops, followed by substitutions and eliminations in the unrolled code, can reduce the number of loads and stores. The unrolling transformation and associated transformations of Fortran DO loops are characterized, and a set of software tools to carry out these transformations is described. The tools use the machinery available in Toolpack and have been integrated into that environment. The results of applying these tools to a collection of linear algebra subroutines are included.
Date:
February 1986
Creator:
Cowell, Wayne R. & Thompson, Christopher P.
Object Type:
Report
System:
The UNT Digital Library
Effect of Depth of Discharge on Lead-Acid Battery Overcharge Requirements
Proper charging is essential to achieve maximum performance and life of lead-acid batteries. Excessive overcharging gives rise to increased battery temperature, gassing rates, electrolyte maintenance, and component corrosion, whereas repeated undercharging causes a gradual decrease in battery capacity, which often becomes irreversible. To develop an optimal charge procedure, the relation between battery available capacity, applied overcharge, and the depth-of-discharge (DOD) level prior to charging needed to be established.
Date:
February 1986
Creator:
DeLuca, W. H. & Tummillo, A. F.
Object Type:
Report
System:
The UNT Digital Library
[Portrait of the cast of a Theater Gemini Production]
Photograph of the cast of a Theater Gemini Production, starring in "Last Summer at Bluefish Cove." The back of the images reads: "The Cast of a Theatre Gemini Production."
Date:
February 7, 1986
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Photograph 2012.201.B0123.0376]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "From left, Nicole Andrews, 11; Rhonda Felton, 10; Christy Collins, 11; and Christina Colbert, 10 make posters at Capitol Hill fifth-Year Center, 2717 S. Robinson."
Date:
February 7, 1986
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0102.0075]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "In the Houston Rockets' view, Anthony Bowie couldn't make their roster but he could take care of their equipment."
Date:
February 11, 1986
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0073.0636]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Oklahoma State's Roshon Patton puts up a jumper at the expense of Missouri's Derrick Chievous in the Cowboy's 86-65 rout over the Tigers Saturday in Gallagher Hall."
Date:
February 15, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0074.0638]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Putnam North's Pat Craney drives on Ronald Dennis during North's 82-56 win over Putnam City Friday night in Class 5A regional play."
Date:
February 28, 1986
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0144.0293]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Cheryl Combs changes the Coronado Heights Elementary marquee."
Date:
February 4, 1986
Creator:
Berland, Nancy
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0148.0510]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mary Crissup, exercises a horse."
Date:
February 27, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0147.0485]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Rep. David Craighead visits with Hoe Davis and his wife, Eugenia, at the Midwest City Chamber's Mongolian barbecue."
Date:
February 18, 1986
Creator:
Howell, Paul S.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0147.0185]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
February 20, 1986
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0148.0303]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "City workers prepare to haul off felled trees."
Date:
February 26, 1986
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0174.0403]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Bobby Bourland"
Date:
February 23, 1986
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0152.0837]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Applicants for jobs with the Dallas police department fill out applications in a hallway Thursday morning at the downtown Holiday Inn."
Date:
February 27, 1986
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History