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Development of Controlled Pitch Nano Arrays for Application in Nano Scale Based Proportional Counters

Description: Proportional counters (PCs) are a type of gas-filled radiation detection device capable of distinguishing between a wide range of radiation types and energies. In this application, however, these devices are limited by high power consumption and high bias potentials required to operate in the proportional detection regime. Previous work performed with a single carbon nanotube (CNT) anode has shown that nanoscale-based PCs can operate at bias potentials of 10V rather than the 1000V range require… more
Date: June 7, 2010
Creator: Sexton, L.; Serkiz, S. & Siegfried, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement of the CKM Angles alpha and gamma at the BaBar Experiment

Description: We present recent measurements of the CKM angles alpha and gamma using data collected by the BaBar detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at the Stanford Linear Accelerator Center. In addition to constraints on alpha from the decays B0 {yields} {pi}{sup +}{pi}{sup -}, B0 {yields} {rho}{sup +} {pi}{sup -} and B0 {yields} {rho}{sup +}{rho}{sup -}, we also report the first measurement of time-dependent CP asymmetries in the decay B0 {yields} a1{sup +}(1260) {pi}{sup -}.… more
Date: June 13, 2007
Creator: Lombardo, V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Outcrop Analysis of the Cretaceous Mesaverde Group: Jicarilla Apache Reservation, New Mexico

Description: Field work for this project was conducted during July and April 1998, at which time fourteen measured sections were described and correlated on or adjacent to Jicarilla Apache Reservation lands. A fifteenth section, described east of the main field area, is included in this report, although its distant location precluded use in the correlations and cross sections presented herein. Ground-based photo mosaics were shot for much of the exposed Mesaverde outcrop belt and were used to assist in corr… more
Date: April 24, 2001
Creator: Ridgley, Jennie & Dunbar, Robin Wright
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Jet Production at D-Zero

Description: The authors report on a new measurement of the rapidity dependence of the inclusive jet production cross section in p{bar p} collisions at {radical}s = 1:8 TeV using 92 pb{sup {minus}1} of data collected by the DO detector at the Tevatron collider. The differential cross sections, <d{sup 2}{sigma}/dE{sub T}d{eta}>, are presented as a function of jet transverse energy (E{sub T}) in five pseudorapidity ({eta}) intervals, up to {vert_bar}{eta}{vert_bar} = 3, significantly extending previous … more
Date: October 17, 2000
Creator: Varelas, Nikos
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Rare K+ Decays from Experiment E787

Description: This paper presents the latest results from experiment E787, at Brookhaven National Laboratory, on K{sup +} {r_arrow} {pi}{sup +} {nu}{bar {nu}} and radiative K{sup +} decays. The result for K{sup +} {r_arrow} {pi}{sup +} {nu}{bar {nu}} uses data collected in runs taken during 1995, 1996 and 1997. In addition, they discuss plans for future measurements of K{sup +} {r_arrow} {pi}{sup +} {nu}{bar {nu}}.
Date: October 9, 2000
Creator: Jain, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Organically-Templated Zinc Hydrogen Phosphites: Syntheses, Structures and Properties of {alpha}- and {Beta}-ZnHOP{sub 3}{center_dot}N{sub 4}C{sub 2}H{sub 4}

Description: The syntheses, crystal structures and some properties of {alpha}- and {beta}-ZnHPO{sub 3}{center_dot}N{sub 4}C{sub 2}H{sub 4} are reported. These two polymorphs are the first organically-templated hydrogen phosphites. They are built up from vertex-sharing HPO{sub 3} pseudo pyramids and ZnO{sub 3}N tetrahedra, where the Zn-N bond represents a direct link between zinc and the neutral 2-cyanoguanidine template. {alpha}-ZnHPO{sub 3}{center_dot}N{sub 4}C{sub 2}H{sub 4} is built up from infinite laye… more
Date: July 14, 2000
Creator: HARRISON,WILLIAM T.A.; PHILLIPS,MARK L.F.; STANCHFIELD,JESSE & NENOFF,TINA M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of oil-bearing Cretaceous sandstone hydrocarbon reservoirs, exclusive of the Dakota Sandstone, on the Jicarilla Apache Indian Reservation, New Mexico

Description: This is the Phase One contract report to the United States Department of Energy, United State Geological Survey and the Jicarilla Apache Indian Tribe on the project entitled ``Outcrop Analysis of the Cretaceous Mesaverde Group: Jicarilla Apache Reservation, New Mexico.'' Field work for this project was conducted during July and August 1998, at which time fourteen measured sections were described and correlated on or adjacent to Jicarilla Apache Reservation lands. A fifteen section, described ea… more
Date: June 8, 2000
Creator: Ridgley, Jennie & Wright Dunbar, Robyn
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Borehole data package for the 216-S-10 pond and ditch well 299-W26-13

Description: One new Resource Conservation and Recovery Act (RCRA) groundwater monitoring well was installed at the 216-S-10 pond and ditch during November and December 1999 in fulfillment of Tri-Party Agreement (Ecology 1996) milestone M-24-42. The well is 299-W26-13 and is located at the northeast comer to the 216-S-10 pond, southwest of 200 West Area. The well is a new downgradient well in the monitoring network. A figure shows the locations of all wells in the 216-S-10 pond and ditch monitoring network.… more
Date: June 1, 2000
Creator: Horton, DG; Williams, BA & Cearlock, CS
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Borehole data package for wells 299-E33-334 and 299-E33-335 at single-shell tank waste management Area B-BX-BY

Description: Two new Resource Conservation and Recovery Act (RCRA) groundwater monitoring wells were installed at the single-shell tank farm Waste Management Area (WMA) B-BX-BY during December 1999 through February 2000 in fulfillment of Tri-Party Agreement (Ecology 1996) Milestone M-24-45. The wells are 299-E33-334 and 299-E33-335. These wells were installed in support of the WMA B-BX-BY assessment to track the movement of contaminant plumes that appear to be entering the WMA from the northeast. Well 299-E… more
Date: June 1, 2000
Creator: Horton, DG
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Borehole data package for wells 299-W22-48, 299-W22-49, and 299-W22-50 at single-shell tank waste management Area S-SX

Description: Three new Resource Conservation and Recovery Act (RCRA) groundwater monitoring wells were installed at the single-shell tank farm Waste Management Area (WMA) S-SX in October 1999 through February 2000 in fulfillment of Tri-Party Agreement (Ecology 1996) milestone M-24-41. The wells are 299-W22-48, 299-W22-49, and 299-W22-50. Well 299-W22-48 is located east of the southeast corner of 241-S tank farm and is a new downgradient well in the monitoring network. Well 299-W22-49 is located on the east … more
Date: May 18, 2000
Creator: Horton, D. G. & Johnson, V. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental measurements of the thermal conductivity of ash deposits: Part 1. Measurement technique

Description: This paper describes a technique developed to make in situ, time-resolved measurements of the effective thermal conductivity of ash deposits formed under conditions that closely replicate those found in the convective pass of a commercial boiler. Since ash deposit thermal conductivity is thought to be strongly dependent on deposit microstructure, the technique is designed to minimize the disturbance of the natural deposit microstructure. Traditional techniques for measuring deposit thermal cond… more
Date: April 1, 2000
Creator: Robinson, A. L.; Buckley, S. G.; Yang, N. & Baxter, L. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Round-robin testing of a reference glass for low-activity waste forms

Description: A round robin test program was conducted with a glass that was developed for use as a standard test material for acceptance testing of low-activity waste glasses made with Hanford tank wastes. The glass is referred to as the low-activity test reference material (LRM). The program was conducted to measure the interlaboratory reproducibility of composition analysis and durability test results. Participants were allowed to select the methods used to analyze the glass composition. The durability te… more
Date: December 6, 1999
Creator: Ebert, W. L. & Wolf, S. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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EXPERIMENTAL RESULTS ON RADIATIVE KAON DECAYS

Description: This paper reviews the current status of experimental results on radiative kaon decays. Several experiments at BNL, CERN and FNAL have recently or will soon complete data collection; as a result, there are several new results.
Date: November 19, 1999
Creator: Kettell, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CDF B spectroscopy results: B** and Bc{sup +}

Description: The authors report on two spectroscopy results from CDF. First, they observe the orbitally excited B** mesons in B {r_arrow} {ell}D(*) X events. They find 28 {+-} 6 {+-} 3% of light B mesons produced are B** states. A collective mass fit results in a B{sub 1} mass of 5.71 {+-} 0.02 GeV/c{sup 2}. Secondly, they observe 20.4{sub {minus}5.5}{sup +0.18} {+-} 0.03 ps lifetime. The production rate is in reasonable accordance with expectations.
Date: September 8, 1999
Creator: Bauer, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The measurement of the mass of the W boson from the Tevatron.

Description: This paper presents measurements of the mass of the W vector boson from the CDF and D0 experiments using data collected at {radical}s = 1.8 TeV during the 1994-1995 data taking run. CDF finds a preliminary mass of M{sub W} = 80.43 {+-} 0.16 GeV and D0 measures a mass of M{sub W} = 80.44 {+-} 0.12 GeV.
Date: August 10, 1999
Creator: Thurman-Keup, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Preliminary flow analysis in experiment E917 at the AGS.

Description: The study of directed flow in heavy ion collisions as a probe of collision dynamics has been of heightened interest to the physics community in recent years. The E917 collaboration is addressing this interest by investigating signatures of flow as a function of rapidity and centrality for fixed target gold on gold collisions at 11.7A GeV/c. The purpose of this report is to demonstrate E917's capability to establish the reaction plane on an event-by-event basis and present preliminary results of… more
Date: August 4, 1999
Creator: Back, B. B.; Betts, R. R.; Chang, J.; Chang, W. C.; Chi, C. Y.; Collaboration, E917 et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Aluminum Honeycomb Characteristics in Dynamic Crush Environments

Description: Fifteen aluminum honeycomb cubes (3 in.) have been crushed in the Mechanical Shock Laboratory's drop table testing machines. This report summarizes shock experiments with honeycomb densities of 22.1 pcf and 38.0 pcf and with crush weights of 45 lb, 168 lb, and 268 lb. The honeycomb samples were crushed in all three orientations, W, L, and T. Most of the experiments were conducted at an impact velocity of {approx}40 fps, but higher velocities of up to 90 fps were used for selected experiments. W… more
Date: July 1, 1999
Creator: Bateman, Vesta I. & Swanson, Lloyd H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of in-situ gamma spectrometry in the remediation of radioactively contaminated soil

Description: The Fernald Environmental Management Project (FEMP) is a US Department of Energy site that is undergoing total remediation and closure. Most of the remediation effort entails massive excavation of soil for disposal, both offsite and onsite, at an engineered disposal facility. In-situ gamma spectrometry is routinely used to support soil excavation operations to accurately and quickly identify soil areas as being above or below regulatory remediation criteria. Two different in-situ gamma spectrom… more
Date: June 1, 1999
Creator: Sutton, C.; Yesso, J.D.; Danahy, R.J. & Cox, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aspherical bubble dynamics and oscillation times

Description: The cavitation bubbles common in laser medicine are rarely perfectly spherical and are often located near tissue boundaries, in vessels, etc., which introduce aspherical dynamics. Here, novel features of aspherical bubble dynamics are explored by time-resolved photography and numerical simulations. The growth-collapse period of cylindrical bubbles of large aspect ratio (length:diameter {approximately}20) differs only slightly from twice the Rayleigh collapse time for a spherical bubble with an … more
Date: June 1, 1999
Creator: Vogel, A.; Noack, J.; Chapyak, E.J. & Godwin, R.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of environmental variables upon in-situ gamma spectrometry data

Description: The Fernald Environmental Management Project (FEMP) is a US Department of Energy site that is undergoing total remediation and closure. Fernald is a former uranium refinery which produced high quality uranium metal. Soil in the Fernald site is pervasively contaminated with uranium and secondarily with thorium and radium isotopes. In-situ gamma spectrometry is routinely utilized in soil excavation operations at Fernald to provide high quality and timely analytical data on radionuclide contaminan… more
Date: June 1, 1999
Creator: Sutton, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Innovative directional and position specific sampling technique (POLO). Innovative technology summary report

Description: The UTD Inc. Position Location (POLO) device is used for identifying the position of characterization sensors in the subsurface. POLO fits within a cone penetrometer rod to quickly and cost-effectively identify sample location, rod tip location, and track the rod path. UTD demonstrated the POLO device at a private site in Virginia and at the DOE Savannah River Site in South Carolina. Results show POLO as accurate as any alternative approach at less than 0.50% error, and at a fraction of the cos… more
Date: June 1, 1999
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Magnetization reversal in melt-quenched NdFeB

Description: Melt-quenched NdFeB is an important modern permanent magnet material. However there still remains doubt as to the magnetization reversal mechanism which controls coercivity in material prepared by this processing route. To investigate this problem a new technique based on measurements of reversible magnetization along recoil curves has been used. The technique identifies the presence of free domain walls during magnetic reversal. For this study samples of isotropic (MQI), hot pressed (MQII) and… more
Date: June 1, 1999
Creator: Crew, D.C.; Lewis, L.H.; McCormick, P.G.; Street, R. & Panchanathan, V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fracture toughness measurements on a glass bonded sodalite high-level waste form.

Description: The electrometallurgical treatment of metallic spent nuclear fuel produces two high-level waste streams; cladding hulls and chloride salt. Argonne National Laboratory is developing a glass bonded sodalite waste form to immobilize the salt waste stream. The waste form consists of 75 Vol.% crystalline sodalite (containing the salt) with 25 Vol.% of an ''intergranular'' glassy phase. Microindentation fracture toughness measurements were performed on representative samples of this material using a … more
Date: May 19, 1999
Creator: DiSanto, T.; Goff, K. M.; Johnson, S. G. & O'Holleran, T. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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