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The development of in vitro mutagenicity testing systems using T-lymphocytes

Description: This annual report describes progress in studies on hprt mutations induced by radon or Indium 111 along with the corresponding mutation frequency, cloning and molecular spectra in human T-lymphocytes. Parallel studies on the mutation susceptibility between individuals is being investigated by hprt mutation studies on ataxia telangiectasia and xeroderma pigmentosum.
Date: May 1, 1993
Creator: Albertini, R.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Determination of the energy of suprathermal electrons during lower hybrid current drive on PBX-M

Description: Suprathermal electrons are diagnosed by a hard x-ray pinhole camera during lower hybrid current drive on PBX-M. The experimental hard x-ray images are compared with simulated images, which result from an integration of the relativistic bremsstrahlung along lines-of-sight through the bean-shaped plasma. Images with centrally peaked and radially hollow radiation profiles are easily distinguished. The energy distribution of the suprathermal electrons is analyzed by comparing images taken with diff… more
Date: June 1, 1993
Creator: Von Goeler, S.; Bernabei, S.; Davis, W.; Ignat, D.; Kaita, R.; Roney, P. et al.
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Partner: UNT Libraries Government Documents Department
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Recovery and purification of nickel-63 from HFIR-irradiated targets

Description: The production of large quantities of high-specific-activity [sup 63]Ni (>10 Ci/g) requires both a highly enriched [sup 62]Ni target and a long irradiation period at high neutron flux. Trace impurities in the nickel and associated target materials are also activated and account for a significant fraction of the discharged activity and essentially all of the gamma activity. While most of these undesirable activation products can be removed as chloride complexes during anion exchange, chromium, p… more
Date: June 1, 1993
Creator: Williams, D. F.; O'Kelley, G. D.; Knauer, J. B.; Porter, C. E. & Wiggins, J. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measuring parity violation using the neutron capture reaction

Description: Measuring parity violation using the total capture reaction has certain advantages over neutron transmission experiments. Very much less material is required for targets, a necessity when dealing with separated isotopes. The capture reaction is also quite sensitive to very weak resonances. These advantages indicated the need to construct a near 4[pi] gamma ray detector for use at LANSCE. A design for such a detector has been completed. Issues influencing the design and the final design paramete… more
Date: January 1, 1993
Creator: Frankle, C. M.; Bowman, J. D.; Seestrom, S. J. (Los Alamos National Lab., NM (United States)); Roberson, N. R. (Duke Univ., Durham, NC (United States) Triangle Universities Nuclear Lab., Durham, NC (United States)) & Sharapov, E. I. (Joint Inst. for Nuclear Research, Dubna (Russian Federation))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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K-Area Acid/Caustic Basin groundwater monitoring report

Description: During fourth quarter 1992, samples from the KAC monitoring wells at the K-Area Acid/Caustic Basin were analyzed for indicator parameters, groundwater quality parameters, parameters indicating suitability as drinking water, and other constituents. New wells KAC 8 and 9 also were sampled for GC/MS VOA (gas chromatograph/mass spectrometer volatile organic analyses). Monitoring results that exceeded the final Primary Drinking Water Standards (PDWS) or the Savannah River Site (SRS) flagging criteri… more
Date: March 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tests of non-local interferences in kaon physics at asymmetric [phi]-factories

Description: Tests of non-local interference effects in the two-kaon system are proposed. The first kind of tests consists of measuring the amount of destructive interference between K[sub S] [yields] K[sub L] regeneration processes of two distant kaons. The second kind deals with constructive interference. These tests could be performed at an asymmetric [phi]-factory. Estimates are given of the number of events predicted by orthodox quantum mechanics and kaon regeneration theory in various suitable experim… more
Date: April 16, 1993
Creator: Eberhard, P.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Infrared detection with high-[Tc] bolometers and response of Nb tunnel junctions to picosecond voltage pulses

Description: Oxide superconductors with high critical temperature [Tc] make sensitive thermometers for several types of infrared bolometers. The authors built composite bolometers with YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] thermometers on sapphire substrates which have higher sensitivity than competing thermal detectors which operate at temperatures above 77 K. A 1 x 1 mm bolometer with gold black serving as the radiation absorber has useful sensitivity for wavelengths 20--100 [mu]m. A 3 x 3 mm bolomete… more
Date: May 1, 1993
Creator: Verghese, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The pp elastic scattering experiment at RHIC and polarization studies in the Coulomb Nuclear Interference region

Description: We have examined the feasibility of measuring proton proton (pp) elastic scattering at small four momentum transfer t. The application of the measurement as a polarimeter in the Coulomb Nuclear Interference (CNI) region for polarized pp collisions is discussed. In addition, other fundamental polarization phenomena can be explored by making use of the same setup. The configuration of the lattice of the Relativistic Heavy Ion Collider (RHIC) which allows the measurement of scattering in CHI regio… more
Date: January 1, 1993
Creator: Guryn, W. (Brookhaven National Lab., Upton, NY (United States)) & Akchurin, N. (Iowa Univ., Iowa City, IA (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutral-current detection in the Sudbury Neutrino Observatory

Description: The Sudbury Neutrino Observatory (SNO) will have the capability of detecting all active species of neutrinos with energies greater than 2.2 MeV by the neutral-current disintegration of deuterium. The comparison of this rate with the rate of inverse beta decay of the deuteron will yield a nearly model-independent answer to the question of whether electron neutrinos from the sun oscillate into mu or tau neutrinos. The signal of a neutral-current interaction is the liberation of a free neutron in … more
Date: January 1, 1993
Creator: Bowles, T. J.; Doe, P. J.; Fowler, M. M.; Hime, A.; Robertson, R. G. H.; Thornewell, P. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Production of jets in association with W vector bosons in the D0 detector

Description: The D0 detector has accumulating data at the Fermilab Tevatron at [radical]s = 1.8 TeV for several months. In this paper we present the results of an analysis based on 1.1 pb[sup [minus]1] of data. We compare the observed W transverse momentum distributions of W+0jet and W+1jet events with a full D0 detector simulated leading order Monte Carlo. The jet multiplicity distributions associated with W are presented as well as new method of testing NLO QCD predictions and measuring the strong couplin… more
Date: March 1, 1993
Creator: Yu, J. (State Univ. of New York, Stony Brook, NY (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Search for the top quark and other new particles at D0

Description: Preliminary results from the search for the top quark and other new particles in p[bar p] collisions at [radical]s = 1.8 TeV are reported. In a data sample corresponding to an integrated luminosity of about 7.5 pb[sup [minus]1], one candidate event for top quark is found in the di-lepton channel. A lower limit for the mass of the top quark of 103 GeV/c[sup 2] (99 Gev/c[sup 2]) is obtained at 95% confidence level with (without) background subtraction. Status of searches for other new particles t… more
Date: September 1, 1993
Creator: Bhat, P.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Strange particle nuclear physics: Workshop summary

Description: Several sessions of the Working Group on Hadronic and Nuclear Spectroscopy dealt with different aspects of strange particle nuclear physics, including hypernuclear spectroscopy, strange dibaryons, and K[sup +] interactions with nuclei. Recent developments in this area are summarized here, and open questions are identified. Some prospects for optimum use of existing facilities, as well as the desired characteristics of future ones, are discussed.
Date: March 1, 1993
Creator: Dover, C. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Resonances in the [Sigma]NN system

Description: We first review certain unique aspects of few-body [Alpha]- hypernuclei and then explore the physics of [summation] threshold in few-body elastic scattering and reactions. In particular, we discuss a predicted enhancement in the [Alpha]d cross section near the [summation]NN threshold in terms of poles in the [Tau]=0YNN amplitude. A brief discussion of anticipated poles in the [Tau]=1 amplitudes is also given.
Date: January 1, 1993
Creator: Gibson, B.F. (Los Alamos National Lab., NM (United States)) & Afnan, I.R. (Flinders Univ. of South Australia, Bedford Park, SA (Australia). School of Physical Sciences)
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Partner: UNT Libraries Government Documents Department
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Thermally excited proton spin-flip laser emission in tokamaks

Description: Based on statistical thermodynamic fluctuation arguments, it is shown here for the first time that thermally excited spin-flip laser emission from the fusion product protons can occur in large tokamak devices that are entering the reactor regime of operation. Existing experimental data from TFTR supports this conjecture, in the sense that these measurements are in complete agreement with the predictions of the quasilinear theory of the spin-flip laser.
Date: July 1, 1993
Creator: Arunasalam, V. & Greene, G. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Contained [nu] events observed in Soudan 2

Description: Atmospheric [nu][sub [mu]] and [nu][sub e] are created in cosmic ray interactions in the atmosphere, and can be detected in underground detectors. The Kamiokande and IMB water Cerenkov detectors have found fewer [nu][sub [mu]] interactions (relative to [nu][sub e]) than are expected. Results are usually expressed by the ratio: R[triple bond]([nu][sub [mu]]/[nu][sub [mu]]) measured ([nu][sub [mu]]/[nu][sub e]) predicted with R found to be less than 1. The Soudan 2 detector is an iron calorimeter… more
Date: January 1, 1993
Creator: Ambats, I.; Ayres, D. S.; Balka, L.; Barrett, W. L.; Dawson, J.; Fields, T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SLAC measurement of the neutron spin structure function

Description: A measurement of the nucleon spin asymmetries from deep inelastic scattering of polarized electrons by polarized [sup 3]He has been performed. The neutron spin structure function g[sub 1][sup n] is extracted and used to test the Bjorken sum rule. The neutron integral assuming a simple Regge theory extrapolation at low x is [integral][sub 0][sup 1]g[sub 1][sup n](x)dx = [minus]0.022 [plus minus] 0.011. Combined with the EMC proton results, the Bjorken sum rule predicts a neutron integral of [int… more
Date: April 1, 1993
Creator: Hughes, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fundamental theory of light for applications: Notes for five informal lectures

Description: These notes give an overview of some aspects of the quantum theory of light and its interaction with matter. A description is given of basic emission and absorption processes, as well as the theory of photodetection and optical coherence. Basic research in this area is increasingly relevant to areas of technological importance, including microlaser devices and the noise characteristics of semiconductor lasers.
Date: June 18, 1993
Creator: Milonni, P.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Title I implementation: Status report on nonattainment areas

Description: Key provisions of Title I of the Clean Air Act Amendments of 1990 (CAAA) focus on bringing cities and other areas into attainment of the National Ambient Air Quality Standards for ozone, carbon monoxide (CO), and fine particulates (PM-10). The CAAA's new classification scheme for pollutant nonattainment areas is based on the relative severity of pollution in these areas and determines the stringency of control measures and the dates by which attainment of the standards will be required. The US … more
Date: January 1, 1993
Creator: Kenkeremath, L. D. & Snyder, T. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Can the measurement of the cross-section of proton-capture on beryllium-7 be improved

Description: The solar neutrino problem'' arises from the discrepancy between the observations of solar neutrinos fluxes in experiments at Homestake and Kamiokande and the solar model predictions of those fluxes. Both experiments, which are sensitive mainly to high-energy neutrinos, observe fewer neutrinos than predicted by solar models. Most of the expected high-energy solar neutrinos come from the beta-decay of [sup 8]B, which is produced in the reaction [sup 7]Be(p,[gamma])[sup 8]B. A study of all of the… more
Date: January 1, 1993
Creator: Bowers, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a high-performance coal-fired power generating system with pyrolysis gas and char-fired high temperature furnace (HITAF)

Description: A concept for an advanced coal-fired combined-cycle power generating system is currently being developed. The first phase of this three-phase program consists of conducting the necessary research and development to define the system, evaluating the economic and technical feasibility of the concept, and preparing an R D plan to develop the concept further. The power generating system being developed in this project will be an improvement over current coal-fired systems. Goals have been specified… more
Date: February 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Engineering development of advanced coal-fired low-emission boiler system

Description: The Pittsburgh Energy Technology Center of the US Department of Energy (DOE) has contracted with Combustion Engineering, Inc. (ABB CE) to perform work on the Engineering Development of Advanced Coal-Fired Low-Emission Boiler Systems'' Project and has authorized ABB CE to complete Phase I on a cost-reimbursable basis. The overall objective of the Project is the expedited commercialization of advanced coal-fired low-emission boiler systems. The specified primary objectives are: (1) NOx emissions … more
Date: May 28, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of potential runaway generation in large-tokamak disruptions

Description: A detailed evaluation of various potential mechanisms for the generation of strong runaway beams during disruptions of largetokamak devices, including TFTR, JET, DIIID and ITER, is performed based on typical operating parameters of these devices and the presently accepted disruption model. The main results include: (1) In the existing devices, the evaporative preicer'' process by itself can lead to sizable runaway beams in disruptions of high-current-medium-to-low-ne discharges. In ITER, such r… more
Date: June 1, 1993
Creator: Fleischmann, H. H. & Zweben, S. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A camera for imaging hard x-rays from suprathermal electrons during lower hybrid current drive on PBX-M

Description: During lower hybrid current drive (LHCD), suprathermal electrons are generated that emit hard X-ray bremsstrahlung. A pinhole camera has been installed on the PBX-M tokamak that records 128 [times] 128 pixel images of the bremsstrahlung with a 3 ms time resolution. This camera has identified hollow radiation profiles on PBX-M, indicating off-axis current drive. The detector is a 9in. dia. intensifier. A detailed account of the construction of the Hard X-ray Camera, its operation, and its perfor… more
Date: May 1, 1993
Creator: Von Goeler, S.; Kaita, R.; Bernabei, S.; Davis, W.; Fishman, H.; Gettelfinger, G. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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