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in subjects: "Mass Spectra"  
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CDF evidence for the top quark & B physics at Fermilab

Description: We present the first direct evidence for the top quark with the Collider Detector at Fermilab (CDF) in a sample of {bar p}p collisions at {radical}s=1.8 TeV with an integrated luminosity of 19.3 pb{sup -1}. The recent B physics results at Fermilab from both collider and fixed target experiments are reviewed.
Date: February 1, 1997
Creator: Yao, Weiming
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent electroweak measurements from the tevatron

Description: Preliminary electroweak results are discussed from the Fermilab experiments, CDF and DO, based on Tevatron run 1b data. These include an updated precision measurement of the W mass which when combined with previous Tevatron, CERN S{bar p}S, and LEP-II results gives a combined world average M{sub W} = 80.40 {+-} 0.08 GeV/c{sup 2}. Also presented are new limits on anomalous gauge boson self-couplings, measurement of the W charge asymmetry, {sigma}{center_dot}B(W{yields} {tau}{nu}{sub {tau}}), and… more
Date: October 1, 1997
Creator: Wagner, Robert G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Preparation of high purity plutonium oxide for radiochemistry instrument calibration standards and working standards

Description: Due to the lack of suitable high level National Institute of Standards and Technology (NIST) traceable plutonium solution standards from the NIST or commercial vendors, the CST-8 Radiochemistry team at Los Alamos National Laboratory (LANL) has prepared instrument calibration standards and working standards from a well-characterized plutonium oxide. All the aliquoting steps were performed gravimetrically. When a {sup 241}Am standardized solution obtained from a commercial vendor was compared to … more
Date: April 1, 1997
Creator: Wong, A.S. & Stalnaker, N.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Quantitative analysis of hydrogen isotopes in the metal hydride of the neutron tube target

Description: We describe an experimental system for the quantitative analyses of hydrogen isotopes in metal hydride targets. The experimental system consists of a target desorption inlet system (TDIS) and a high-resolution mass spectrometer. The TDIS has a unique design that provides complete desorption of the gas and rapid, direct, and accurate measurements of pressure, volume, and temperature of the total gas desorbed from the target. The mass spectrometer measures partial pressures of the hydrogen isotop… more
Date: March 1, 1997
Creator: Bach, H.; Black, S. & Chamberlin, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Transformation rates and fate of dissolved, colloidal and particulate forms of organic carbon in ocean margins. Final report, May 1, 1992--April 30, 1995

Description: The goal of our proposal was to develop new sampling and analytical techniques which could be used to understand the transformation rates and mechanisms of exchange between dissolved, colloidal, small particle and large particle size classes of organic carbon in ocean margins. To meet this goal, we focused on the development of cross-flow filtration (CFF) for the isolation of colloidal material from the dissolved phase in seawater. In addition, we tested and optimized high sensitivity technique… more
Date: June 1, 1997
Creator: Buesseler, K. O.; Moran, S. B. & Bauer, J. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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b {r_arrow} sl{sup +}l{sup {minus}} in the left-right symmetric model

Description: We begin to analyze and contrast the predictions for the decay b {r_arrow} sl{sup +}l{sup {minus}} in the Left-Right Symmetric Model (LMR) with those of the Standard Model (SM). In particular, we show that the forward-backward asymmetry of the lepton spectrum can be used to distinguish the SM from the simplest manifestation of the LRM.
Date: May 1, 1997
Creator: Rizzo, T. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Rapid detection of CW residues on soil using an ion trap SIMS

Description: Technology for the rapid detection and identification of chemical warfare (CW) residues on soil samples is being developed at the Idaho National Engineering and Environmental Laboratory (INEEL). The development effort is being undertaken because of a need for rapid and specific characterization for possibly contaminated soils samples, preferably in the field. Secondary ion mass spectrometry (SIMS) is being pursued for these applications because SIMS combines rapid, specific and sensitive surfac… more
Date: August 1, 1997
Creator: Groenewold, G. S.; Ingram, J. C.; Dahl, D. A.; Appelhans, A. D. & Delmore, J. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Spectroscopy and decays of charm and bottom

Description: After a brief review of the quark model, we discuss our present knowledge of the spectroscopy of charm and bottom mesons and baryons. We go on to review the lifetimes, semileptonic, and purely leptonic decays of these particles. We conclude with a brief discussion B and D mixing and rare decays.
Date: October 1, 1997
Creator: Butler, J.N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Determination of chlorinated solvents in high VOC wastewaters

Description: Gas chromatography - Mass Spectrometry using mass spectrometer source programming and a selected ion monitoring method has been applied to the analysis of trace levels of trichloroethene and tetrachloroethene in process waste waters that contain up to 20 wt percent volatile organic compounds. The method provides selectivity for the target compounds and freedom from interference from the other volatile compounds in the sample. Initial attempts at meeting customer required detection limits were u… more
Date: July 1997
Creator: Young, J. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Shale oil value enhancement research. Quarterly report, July 1, 1994--September 30, 1994

Description: Activities during this quarter focused on using the phase-I results to define process sequence alternatives for phase-II. Two process alternatives have been devised while obtaining the desired marketable product slate. The status of required process units has been evaluated. While there are some units that need to be designed and fabricated, the upstream process units are in place to proceed with the process plan. Separations have been completed and analyzed on three of the four shale oil fract… more
Date: May 1, 1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Production and measurement of minor actinides in the commercial fuel cycle

Description: The minor actinide elements, particularly neptunium and americium, are produced as a normal byproduct of the operation of thermal power reactors. Because of the existence of long-lived isotopes of these elements, they constitute the major sources of the residual radiation in spent fuel or in wastes resulting from reprocessing. This has led to examinations by some countries of the possibility of separating the minor actinides from waste products. The papers found in this report address the produ… more
Date: March 1, 1997
Creator: Stanbro, W.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hadronic spectra from collisions of heavy nuclei

Description: Hadronic spectra from collisions of heavy ions at ultrarelativistic energies are discussed, concentrating on recent measurements at the SPS of central Pb+Pb collisions at 158 GeV/nucleon, which are compared to collisions of lighter ions and at lower beam energies. Baryon stopping is seen to be larger for heavier systems and lower energies. Total yields of pions and kaons scale with the number of participants in central collisions at the SPS; in particular, the K/{pi} ratio is constant between c… more
Date: March 1, 1997
Creator: Jacobs, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Top quark, W-boson and light Higgs

Description: The top quark, the W-boson and the Higg boson form an interesting triptych of elementary particles. In the Standard Model knowing the mass of two of these particles, usually the top quark and W-boson, we can predict the mass of the third, the Higgs boson. Therefore in this proceedings I will primarily cover the following topics, top quark physics, W-boson mass and the light Higgs boson at the proton-antiproton collider at Fermilab, the Tevatron. Other hadron collider topics to be cover in this … more
Date: October 1, 1997
Creator: Parke, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Speciation of chromium and manganese using pneumatically assisted electrospray mass spectrometry

Description: It is not an exaggeration to say that much of chemistry involves ions in solution. A technique which allows for ions to be transferred from solution into the gas phase and subsequently analyzed by mass spectrometric detection would be of importance. If structural information, representative of the solution chemistry could be gained from these gas-phase ions, this would also be important. Electrospray mass spectrometry (ES-MS) is such a technique.
Date: February 1, 1997
Creator: Gwizdala, A.B. III
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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The dijet mass spectrum at D-Zero

Description: We present preliminary results from an analysis of jet data collected during the 1994-95 Tevatron Collider run with an integrated luminosity of 93 pb{sup -1}. Measurements of dijet mass spectra in {anti p}p collisions at {radical}s = 1.8 TeV are compared to next-to-leading order QCD calculations.
Date: November 1, 1997
Creator: Abbott, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Characterization of asphaltenes from processed resids

Description: The current and future trend for petroleum processing is towards conversion of heavier and heavier fractions into useful products such as gasoline and diesel. Asphaltenes, the heptane insoluble fraction of heavy oils, are a solubility class and not a specific boiling range. They tend to be the hardest fraction to process in the refinery because of their high molecular mass, aromaticity and heteroatom and metal (S, N, Ni, V) content. Molecular characterization of asphaltenes is important since a… more
Date: April 1, 1997
Creator: Hunt, J. E.; Winans, R. E. & Miller, J. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Co-firing high sulfur coal with refuse derived fuels. Technical progress report No. 10, January 1997--March 1997

Description: In previous progress reports, we reported our study on the proposed mechanism for the formation of chlorinated organics during combustion, in which molecular chlorine is thought to be the key starting material. The objective of this quarter of study was to quantitatively test the inhibiting effect of SO{sub 2} on the formation of Cl{sub 2} during the combustion of MSW. The experiments were conducted under conditions close to those employed in the AFBC system. The principle analytical technique … more
Date: February 28, 1997
Creator: Pan, Wei-Ping; Riley, J. T. & Lloyd, W. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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