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Bose-Einstein correlations in e/sup +/e/sup -/ collisions

Description: The MARK II detector is used to study the Bose-Einstein correlation between pairs and triplets of charged pions produced in hadronic decays of the J)psi), the ..sqrt..s = 4 to 7 GeV continuum above the J)psi), two photon events at ..sqrt..s = 29 GeV, and e/sup )plus/)e/sup )minus/) annihilation events at ..sqrt..s = 29 GeV as a function of Q/sup 2/, the four-momentum transfer squared. After corrections for Coulomb effects and pion misidentification, we find a nearly full Bose-Einstein enhanceme… more
Date: December 1, 1987
Creator: Juricic, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluating late detection capability against diverse insider adversaries

Description: This paper describes a model for evaluating the late (after-the-fact) detection capability of material control and accountability (MCandA) systems against insider theft or diversion of special nuclear material. Potential insider cover-up strategies to defeat activities providing detection (e.g., inventories) are addressed by the model in a tractable manner. For each potential adversary and detection activity, two probabilities are assessed and used to fit the model. The model then computes the … more
Date: December 3, 1987
Creator: Sicherman, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Particle identification for beauty physics

Description: We look briefly at the requirements for particle identification for possible beauty experiments at the Tevatron, both in the fixed target and the collider mode. Techniques presently in use in high energy physics experiments, and under development, should make sensitive experiments feasible. However, in all cases the present state of the art must be advanced to meet the necessary requirements for segmentation andor rate capability. The most fundamentally difficult challenges appear to be the eff… more
Date: January 1, 1987
Creator: Ludlam, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Heavy leptons at the SSC

Description: It is argued that detection of heavy leptons at the Superconducting Super Collider seems to be very difficult but perhaps not impossible. The feasibility is shown to depend critically upon the ability to identify events with W's decaying hadronically and missing transverse momentum. (LEW)
Date: December 15, 1987
Creator: Anderson, G. & Hinchliffe, I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Report of the Intermediate-)ital p)/sub Perpendicular/ Detector Group: A Beauty Spectrometer for the SSC (Superconducting Super Collider)

Description: A ''Beauty Spectrometer'' has been designed for studies of B physics at the SSC. The ultimate goal is a definitive measurement of CP violation in the B system. The spectrometer consists of two stages and occupies one side of an intermediate-luminosity interaction region. An upstream, or intermediate, stage extends from the interaction point to 14 m and covers the angular region from 57 mrad (3.3 degree) to 350 mrad (20 degree). The forward stage extends to 77 m and to angles down to 5.7 mrad. T… more
Date: July 1, 1987
Creator: Foley, K. J.; Buchanan, C. D.; Morrison, R. J.; McHugh, S. W.; Witherell, M. S.; Atac, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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First tests with fully depleted PN-CCD's

Description: We have fabricated 280 ..mu..m thick fully depletable pn CCD's on high resistivity silicon ()rho) approx. 2.5 k..cap omega..cm). Its operation is based on the semiconductor drift chamber principle proposed by Gatti and Rheak. They are designed as energy and position sensitive radiation detector for (minimum) ionizing particles and X-ray imaging. Two dimensional semiconductor device modeling demonstrates the basic charge transer mechanisms. Prototypes of the detectors have been tested in static … more
Date: January 1, 1987
Creator: Strueder, L.; Lutz, G.; Sterzik, M.; Holl, P.; Kemmer, J.; Prechtel, U. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Quench detection by fluid dynamic means in cable-in-conduit superconductors

Description: The tight confinement of the helium in cable-in-conduit superconductors creates protection problems because of the substantial pressure rise that can occur during a quench. But the same pressure rise offers the useful possibility of a non-electrical means of detecting incipient quenches by monitoring the outflow from the various hydraulic paths of the magnet. If the method is to work, the signal must be large enough to be detected unambiguously at an early enough time, and the signal must not d… more
Date: June 1, 1987
Creator: Dresner, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Use of Artificial Intelligence for Safeguarding Fuel Reprocessing Plants

Description: Recorded process data from the ''Minirun'' campaigns conducted at the Barnwell Nuclear Fuel Plant (BNFP) in Barnwell, South Carolina during 1980 to 1981 have been utilized to study the suitability of computer-based Artificial Intelligence (AI) methods for process monitoring for safeguards purposes. The techniques of knowledge engineering were used to formulate the decision-making software which operates on the process data customarily used for process operations. The OPS5 AI language was used t… more
Date: January 1, 1987
Creator: Wachter, J. W. & Forgy, C. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CDF (Collider Detector at Fermilab) detector simulation

Description: The Collider Detector at Fermilab (CDF) uses several different simulation programs, each tuned for specific applications. The programs rely heavily on the extensive test beam data that CDF has accumulated. Sophisticated shower parameterizations are used, yielding enormous gains in speed over full cascade programs. 3 refs., 5 figs.
Date: December 1, 1987
Creator: Freeman, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The response of survey meters to pulsed radiation fields

Description: The response of most survey meters to steady radiation fields is fairly well known and documented. However, hardly any data is available in the literature regarding the response of these instruments to pulsed radiation. Pulsed radiation fields are encountered, e.g., in the vicinity of linear electron accelerators or klystrons. An instrument that ordinarily responds well to the average dose rate spread out evenly in time may not be able to cope with such a high dose rate. Instruments which have … more
Date: November 1, 1987
Creator: McCall, R.C. & Ipe, N.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Search for tau decays to the eta meson

Description: Using a sample of 530,000 tau leptons collected by the Crystal Ball experiment at the e/sup +/e/sup -/ storage ring DORIS II, we have searched for tau decays to the eta meson. No eta signal is found in the inclusive analysis, tau ..-->.. eta X, of 1-prong decays, leading to the upper limits, BR(tau/sup -/ ..-->.. nu ..pi../sup -/eta) <0.3%, BR(tau/sup -/ ..-->.. ..pi../sup -/..pi../sup 0/eta) <0.9%, BR(tau/sup -/ ..-->.. nu ..pi../sup -/..pi../sup 0/..pi../sup 0/eta) <3.1%, BR(tau/sup -/ ..-->.… more
Date: December 1, 1987
Creator: Skwarnicki, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutral transverse momentum spectra in 200 A GeV O + nucleus reactions

Description: This paper discusses the experimental arrangement and detection system being used to study the neutral transverse momentum spectra of 200 GeV oxygen 16 reactions with carbon, copper and gold targets. Some preliminary results are given. 12 refs., 3 figs.
Date: January 1, 1987
Creator: Loehner, H.; Albrecht, R.; Awes, T.C.; Baktash, C.; Bechmann, P.; Berger, F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Gamma-ray and neutron spectroscopy of planetary surfaces and atmospheres

Description: The neutrons and gamma rays escaping from a planet can be used to map the concentrations of various elements in its surface. In a planet, the high-energy particles in the galactic cosmic rays induce a cascade of particles that includes many neutrons. The ..gamma.. rays are made by the decay of the naturally-occurring radioelements and by nuclear excitations induced by cosmic-ray particles and their secondaries (especially neutron capture or inelastic scattering reactions). After a short history… more
Date: January 1, 1987
Creator: Reedy, R. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The status of the SLAC Linear Collider and of the Mark II detector

Description: At SLAC we are currently involved in the exciting challenge of commissioning the first example of a new type of colliding beam accelerator, the SLAC Linear Collider, or SLC. The goals of the SLC are two-fold. It will explore the concept of linear colliders, and it will allow the study of physics on the Z/sup 0/ resonance. It accomplishes these goals by exploiting the existing SLAC linac and the large visible cross-section of approximately thirty nanobarns of the Z/sup 0/. The MARK II detector w… more
Date: October 1, 1987
Creator: Lankford, A.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ventilating-air change rate versus particulate contaminant spread

Description: This study provides information on the spread of particulate contamination from glovebox leaks in plutonium manufacturing facilities, with emphasis on the effect of ventilating-air change rate on contaminated spread. A new, very sensitive aerosol tracer technique was developed to simulate plutonium aerosol leaks and its dispersion in a room. The tracer, a submicron aerosol of phloroglucinol, does not interfere with work activity and is detected by its ability to form ice crystals in a supercool… more
Date: November 13, 1987
Creator: Langer, G. & Deitesfeld, C. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Probing the Non-Minimal Higgs Sector at the SSC

Description: Non-minimal Higgs sectors occur in the Standard Model with more than one Higgs doublet, as well as in theories that go beyond the Standard Model. In this report, we discuss how Higgs search strategies must be altered, with respect to the Standard Model approaches, in order to probe the non-minimal Higgs sectors at the SSC.
Date: November 1, 1987
Creator: Gunion, J. F.; Haber, H. E.; Komamiya, S.; Yamamoto, H. & Barbaro-Galtieri, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design and construction of a Vertex Chamber and measurement of the average B-Hadron lifetime

Description: Four parameters describe the mixing of the three quark generations in the Standard Model of the weak charged current interaction. These four parameters are experimental inputs to the model. A measurement of the mean lifetime of hadrons containing b-quarks, or B-Hadrons, constrains the magnitudes of two of these parameters. Measurement of the B-Hadron lifetime requires a device that can measure the locations of the stable particles that result from B-Hadron decay. This device must function relia… more
Date: October 1, 1987
Creator: Nelson, H.N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Intermediate energy neutrino physics

Description: Occasionally, our understanding of a situation in physics is apparently so clear that consequences of a particular experimental result can imply a substantial confrontation with our view of the physical world. The standard model of electroweak interactions is now so clear that a number of experimental consequences are precisely predicted. This seems like a delightful situation for experimenters, but the bad news is that the experiments on which the predictions rest are at least hard and certain… more
Date: January 1, 1987
Creator: White, D. Hywel
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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New results on the tau lepton

Description: This is a review of new results on the tau lepton. The results include precise measurements of the lifetime, measurements of the decay tau/sup -/ ..-->.. ..pi../sup -/2..pi../sup 0/nu/sub tau/ with much improved precision, and limits on decay modes containing eta mesons, including the second-class-current decay tau/sup -/ ..-->.. ..pi../sup -/eta nu/sub tau/. The implications of these new results on the discrepancy in the one-charged-particle decay modes are discussed. 52 refs., 6 figs., 2 tabs. more
Date: November 1, 1987
Creator: Gan, K.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Detection and speciation of transuranium elements in synthetic groundwater via pulsed-laser excitation

Description: High sensitivity methods for detection and speciation of complexed transuranium ions in synthetic basalt groundwater, and simplified analogs, are being developed which exploit advances in pulsed laser technology. The first demonstration of high sensitivity detection of a transuranium ion at temperatures significantly above ambient is reported using laser photoacoustic spectroscopy (LPAS). The existence of enhanced LPAS signal amplitudes with increasing temperature in aqueous solution is confirm… more
Date: January 1, 1987
Creator: Beitz, J. V.; Bowers, D. L.; Doxtader, M. M.; Maroni, V. A. & Reed, D. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of uncertainties in irradiated hardware characterization: Final report, September 30, 1986-March 31, 1987

Description: Waste Management Group, Inc. has evaluated the techniques used by industry to characterize and classify irradiated hardware components for disposal. This report describes the current practices used to characterize the radionuclide content of hardware components, identifies the uncertainties associated with the techniques and practices considered, and recommends areas for improvement which could reduce uncertainty. Industry uses two different characterization methods. The first uses a combinatio… more
Date: October 1, 1987
Creator: Bedore, N.; Levin, A. & Tuite, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of the neutron self-interrogation approach for assay of plutonium in high-. cap alpha. ,n materials

Description: Neutron self-interrogation is a proposed method for assay of plutonium in bulk materials with very high ..cap alpha..,n activity. The simple assay approach assumes that neutron multiplication for the calibration standards is the same as that for the bulk items. Efforts to use bulk properties to determine corrections to the calibration for changing multiplication have been initiated. Self-interrogation assays of bulk pyrochemical residues have been performed. Comparison with tag values obtained … more
Date: January 1, 1987
Creator: Russo, P. A.; Menlove, H. O.; Fife, K. W.; West, M. H. & Miller, B. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Look at Supernova 1987A

Description: Supernova 1987A is reviewed with emphasis on the neutrino observations. It is shown that the results fit well with the expectations for neutrino temperatures (T approx. 4epsilon/sub 0/4.5 MeV) and total energy emitted (2epsilon/sub 0/4 x 10/sup 53/ ergs). It is argued that the detection tends to favor collapse models that yield emission for 10 second timescales with a 1epsilon/sub 0/2 second early accretion phase followed by Kelvin-Helmholtz cooling as opposed to prompt shocks with the immediat… more
Date: October 1, 1987
Creator: Schramm, D. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Physics Division activities report, 1986--1987

Description: This report summarizes the research activities of the Physics Division for the years 1986 and 1987. Areas of research discussed in this paper are: research on e/sup +/e/sup /minus// interactions; research on p/bar p/ interactions; experiment at TRIUMF; double beta decay; high energy astrophysics; interdisciplinary research; and advanced technology development and the SSC.
Date: January 1, 1987
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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